text:
User:Mwnuk/myWork CoreControl

Write problem/project Goal
Research and develop a working core control system

My First Task
Research the core control system and prepare an introduction presentation for next week.

Summary of actual work over first weekend
Read through the tutorial for constructing a homebrew Core control on instructables as well as research from Standford Magazine and Avacore's website.

Week1 Narrative
Both of us were tasked with general research to familiarize ourselves with the core control technology in preparation for giving an introduction presentation to the class. The majority of my research was from Instructables which provides a tutorial for building a homebrew core control system. Additional research from Standford Magazine where the technolgy was origonally developed and from the commercial producers of the product Avacore's website

Avacore produced documentaries explaining the technologies.
 * Video 1
 * Video 2
 * Video 3

My Second Task
My second task is to test the vacuum pump and buy PVC pipes and couplings to start basic assembly of the glove.

Summary of actual work over second weekend
Over the second weekend I bought and tested the materials for creating a vacuum as well as some of the materials for assembling the glove.

Week2 Narrative
This weekend I spent time with the good people of home depot. First I decided to test the vacuum pump on an ordinary container to see if I could produce the 3 inches of mercury needed as per the specifications. This turned out to be fairly easy. I cut a crude hole in an empty creamer container and fit a tube covered with latex hose into it. The latex hose was to create a snug fit and allow an airtight seal. I covered the threads with silicone sealant to create an airtight seal there and presto, 5 inches of mercury.

My Third task
My tasking for the third weekend is to acquire the divers glove to create an airtight seal around the wrist.

Summary of actual work over third weekend
This past weekend I created the wrist seal component for the glove.

Week3 Narrative
I got the divers gloves in the mail at the end of last week. Obviously there are only two so I was a but nervous that I may not get it right, cutting it too close to the wrist or the gloves being too large to create a seal. I was pleased with the gloves overall and had been advertised to be airtight, they seemed tight so I figured there wouldn't be a problem. I cut the gloves as close to the fingers as I could to ensure enough room to attach them firmly to the 4" x 3" PVC reducer.

My Fourth task
The last weekend on the project I still needed to get the pump set up in a jar to attach and create a vacuum in the actual glove.

Summary of actual work over fourth weekend
This weekend I finished up the vacuum tube / hand pump stuff, created the water pump jar and got everything all together.

Week4 Narrative
So upon inventory of what was left I realized there was still a bunch to do. I had at this point gotten the water pipes through the body of the glove and the wrist assembly on the PVC reducer. Remaining was to get the vacuum pump working on the glove and create the water pump jug apparatus. I set to work on the vacuum first because I assumed this was going to be the biggest problem. I realize that making a vacuum in a jar that can be sealed on all points is easy enough, but this was an attempt at creating a vacuum in a PVC pipe that you are able to stick your hand into. Probably not the easiest thing in the world. I cut the hole, put a small layer of latex over the tube and jammed it in there. At this point I had thought I might be good on that and went to work on the water pump situation. This was very easy as it turns out. The ridged pipe idea that was brought up worked very well with several levels of this project. It was cleaner for one thing which was the original intention (to keep from having a bunch of tubes everywhere). It worked well with the water pump we ended up with because it screwed in, as well as the thermal transfer which I obviously should had thought about before.

After applying silicone to the inside of the wrist strap and the band where the wrist strap is connected to the PVC reducer the leak is much reduced to the point where 5 inches of mercury vacuum can be produced inside the core control unit with the persons hand inside. The silicone inside the wrist strap does however make it somewhat of a chore to get my hand in, but i have big meat hooks for hands. We now have a fully functional Core Control unit!

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Mwnuk/myWork CoreControl


text:
Wind Tunnel/Howard Community College/Spring 2012

Teams working on this project
 * /BJM550/

 * /BJ560/

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/


text:
Wind Tunnel/Howard Community College/Spring 2012/BJM550

Problem Statement
Design, Develop, and Build a Wind Tunnel for testing other projects.

Team Members

 * Brittany Simon
 * Justin Jones
 * Michael Walker

Summary
We started this project by first researching designs for wind tunnels through multiple databases to find which designs are the most efficient, simplistic, and realistic for our needs in this project. We found that we had to build a wind tunnel that incorporated an air compressing section with a honeycomb to reduce air buffeting, a test section where the wind velocity is at its highest for testing objects, and a diffuser which reduces the wind speed and releases it. We also found that we should pull the air through instead of pushing it to reduce air buffeting. We then began setting up the fan assembly through an esc and an arduino board. this would give us the best control over the velocity of the fan and would allow simple operation. Following this we began building the wind tunnel in sections. We built the air compressor and diffuser from scratch to the specifications we found necessary for proper operation. We also began designing the test section which will be made of plexi glass and ways to to measure wind speed as well as be able to see its movement around the solid objects.

Story
''Tell a detailed story of the project. Describe how split up, what the obstacles were, what testing was done, what informal decisions were made, what assumptions were made, what the results were.''

Decision List
Decsion to make the air blown through the wind tunnel by the fan, or blown out the wind tunnel and sucked through by the fan. We decided to pull the air through.

Material List

 * Adruino Uno
 * Hextronik HXT 80 Electronic Speed Controller
 * Brushless Motor
 * Converted computer power supply

1 4'x 4' sheet of 1/2inch thick particle board. $10.00  2000 8.5 inch inflexible straws $20.00
 * Purchases made

This is an arbitrary condition. It is not yet known what may need to be purchased in order to complete this project. Depending on what is needed to determine wind speed and to create a way to see air stream further purchases would be logical.
 * Future Purchases

Software List

 * Arduino 1.0 Programming Software
 * Google Chrome

Time
35 hours

Tutorials
Arduino/ESC_Programming Was updated

Next Steps
The next group will need to be able to find a way to measure wind speed inside the tunnel, find a way to observe the wind patterns inside the tunnel using dust,toner,smoke, etc. create a simple on off mechanism for the fan,esc,arduino system ,and finish the test section by finding a way to safely cut plexi glass. Some of the current problems include, making the fan system able to run off of outlet power instead of an external power source, making all the straws adhere together in the honeycomb so that they do not jostle during testing, and being able to cut plexi glass.


text:
User:Kmashaye5220/enes100/myWork02

''This is designed for a person working on a project for 4 weeks as part of a 3 credit class. Please copy this form to your user page. Then delete everything in italics when filling out this form.''

Write problem/project Goal
What is your wording of the overall problem/project goal?

My First Task
What are you going to do for the team this first weekend?

Summary of actual work over first weekend
How is what you did different than what you planned?

Week1 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Second Task
Record what you are planning on doing for the team during the second weekend.

Summary of actual work over second weekend
How is what you did different than what you planned?

Week2 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Third task
Record what you are planning on doing for the team during the third weekend.

Summary of actual work over third weekend
How is what you did different than what you planned?

Week3 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Fourth task
''Record what you are planning on doing for the team during the final weekend of project work. ''

Summary of actual work over fourth weekend
How is what you did different than what you planned?

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Kmashaye5220/enes100/myWork02


text:
3D Scan/Kinect Makerbot/Howard Community College/Spring2012/p21550Kinect Robotic Car

Problem Statement
Use Arduino and kinect's gesture feature to create a robotic RC car.

Team Members

 * Mir07
 * Eshipley

Summary
Initially we agreed to use RC Car in the lab, However that required pulling apart a brand new RC toy so we decided to calibrate controller with another toy car that had the same frequency. The we decided to use kinect-gesture features and the arduino to send information to the controller.

Story
The Main idea of this project was to hook up kinect and arduino with an RC car, then move it using kinect gestures. The kinect, using serial communication would be able to communicate with the arduino and the arduino then converts that data from the kinect gestures to the RC controller which then moves the RC car. The Project was split up between two team members; one of the members was responsible for software part which would deal with the kinect, processing all the gesture based information using c# or python language, then using processing the kinect gesture information would be translated into the arduino which would pass on the parameters to the RC controller to move the car. The other team member was responsible for actually hacking the RC controller and matching its frequency with a RC car.

Decision List

 * I. Robotic Car

1) How does it work?        A) Hardware -kinect -RC Car and hackecd RC Controller B) Software- To convert kinect gestures data to arduino data             - http://files.ch9.ms/coding4fun/KinectForWindowsSDKQuickstarts.zip   -http://codingfun.collinboy.net/     2) What else might be needed? A) Equipment to check the controller’s polarity

Material List
Nothing Needs to be purchased for this project, the code and kinect software can be downloaded online from http://channel9.msdn.com/
 * 1. RC Controller
 * 2. RC Car
 * 3. Kinect

Software List
There is no Actual software but some code is required that can be downloaded from
 * 1) http://channel9.msdn.com/
 * 2) kinect Drivers can be downloaded from http://www.microsoft.com/en-us/kinectforwindows/

Time
17 Hours

Tutorials
All projects create new tutorials of technical details future participants are going to want to know. They are going to be separate pages that are linked to here.

Next Steps
The software part of this project is complete, even the wiring with the arduino and kinect is complete. The only part which was not completed was the RC controller hack. This project can be completed if the RC controller can be calibrated with the RC car and the arduino.


text:
User:Kmashaye5220/enes100/myWork2

Write problem/project Goal
1.Repairing an ATX power supply, which is already converted to a LAB one, but it does not work

My First Task
I am going to consider all possibilities that caused the power supply to be broken. I plugged in the power supply and observed that its fan does not work. I checked binding posts output voltage by a multimeter, but I saw that voltage of all binding posts are zero. There is no output. I took a video and explained the issue.

The video of the broken power supply

Possible issues:

1. one of the stripped wires, has touched the case, other wires, other connections or parts of the power supply, so the system goes to protection mode.

2. One wires has damaged in somewhere and has touched the case or other parts.

3. One of the original parts of the power supply, such as Capacitors, resistors, transformer,etc, has burned up.

Possible solutions:

1 & 2. Opening up the power; finding the stripped wire or the damaged part of a wire which has touched other parts of the power; disconnect it from that part; connect it to its proper connection and cover it by electrical tape or heating shrink.

3. I hope that none of the power supply's parts has burned up, because finding and replacing the burned part is so difficult and, it is not economically valuable. If the power supply is burned up, the best solution is to buy another power supply!

Summary of actual work over first weekend
My teammate and I opened up the power supply. I tested output voltages of the wires. The did not have any voltage. I checked the connection of the green and black wire. That was okay. We realized the the issue is bigger than we thought before. We tried to trace the input voltage and to figure out where the voltage is leaking, but it was so complicated and finally we gave up.

We got to convert more ATX power supply to LAB ones, so I took a power supply from a computer. I opened it up. I drilled 5 holes for binding posts. Then, I took anything I needed home. At home, I connected a red and a black wire to a 5 ohm power resistor. I connected all same color wires to each other, and I connected the green wire and a black wire to the switch. I attached binding posts to the holes. I connected all wires to their binding posts. Finally, I tested the power supply.

Week1 Narrative
In Class- My teammate and I opened up the power supply. I tested all output wires' voltages, red, orange, and yellow, but they did not have any voltage. I was skeptical about their wires, so I tested their voltage from the points that they were connected to the power's board. The result was same. I, also, checked the connection of the green and the black wire. The connection was perfect. Finally, we realized that the issue is more complicated than we thought it is. We started to trace the input voltage. we tested the voltage that comes to the power and then to its switch by multimeter. the voltage was 120 volt. Then, we followed the wires from switch to the board. I measured the voltage again. It was 120 volt. No voltage leak. After that, we tried to follow the voltage trace again, but it goes to something that I guess it is a transformer. We are not familiar with a transformer structure, so ,actually, we gave up. Troubleshooting a complicated ATX power supply needs lots of information and skills.

My Second Task
I should solder all connection and cover all stripped wires and connections by shrink tube. And the power supply will be ready!

Also, I guess I should convert another power supply.

Summary of actual work over second weekend
I labeled binding posts with their output voltage. After that, I soldered all binding posts to wires. Then, I covered them be electrical tape. After that, I soldered the green and the black wire to the switch and taped them tightly. Next, I placed the switch into its hole and closed the power supply carefully. Finally, I tested the power supply. It works perfectly.

Also,I got to make a test protocol for the power supply. For doing so, I made a simple circuit with the power supply, a 1.5 ohm power resistor, and a multimeter. And I measured currents with different voltages of the power supply. The results follows the formula V=R.I. I made a table of results.

In addition, I got to test a manufactured power supply which has been recently purchased for the class. I made a circuit same as above. And, I changed the voltage and observed how current relatively changed. Also, I realized that the power resistor got too hot when the current increased.

Week2 Narrative
I typed and printed voltage labels and stuck them below their proper binding posts.

Here is a video which shows how current increases when voltage increases. This video was taken a few minutes after running the circuit, so the resistor had gotten even hotter; therefore, as shown, the maximum current had decreased compared to a few moments before.

The Manufactured LAB Power Supply

My Third task
I should make two LAB power supply with these two boards:

Summary of actual work over third weekend
I measured the output voltage of the board #1, the smaller board, and I saw that it produced 27 volt and 5 volt. Also, I realized that when I unplugged that had still voltage, so I connected a power resistor to the white wire, 5 volt, and a black wire in order to discharge capacitors, but a small parts of the board- I guess a resistor- started to making smokes, so I unplugged it quickly. After that, when I plugged it again, I figured out the board does not produce power. It was burned up. Therefore, I cut off its power cable for using in the other board. I connected the power cable to the board #2 and measured its output voltage. It produces 5 and 1.2 volt. I need to make a box for it.

Week3 Narrative
First, I stripped all wires of the board #1. I has 8 wires; 2 blacks, 2 reds, and 4 whites. Then, I plugged it in and measured the output voltages. As usual, blacks are ground. I found out that reds have 27 volt. Also, the 3 white wires next to reds have 27 volt and the last white has 5 volt. Because I had already gotten 27 volt, I cut off those white wires which produced 27 volt. Therefore, I have 2 black wires, 2 red wires and a white wire.

Finally, I plugged in the circuit and tested the output voltages again. This board produces 1.2 and 5 volt. It was written on the board that it can produces 15, 24, and 5 volt, but in fact it does not. Probably, some parts of the board had been damaged, so it is not efficient as it has to be.

My Fourth task
I am going to make a box for the board, so it will be usable in LAB as a power supply.

Summary of actual work over fourth weekend
I got a spaghetti carton, and I put thick pieces of cardboard inside it to support its sides and make them stronger. I fixed the board on a cardboard and fixed it into the carton. I made holes for power cable, switch, and 3 binding posts. I placed them into their holes. Finally, I wrapped the carton by Aluminum foil and tested the binding posts voltages. They perfectly work. After that, I wrapped the carton by clear tape because Aluminum foil can easily be torn apart. Then, I printed and attached labels, which show the voltage of each binding posts, below them.

Week4 Narrative
I found a spaghetti carton. I put 4 pieces of cardboard parallel to each side of the carton and glued them in order to make the carton stronger. On one of those pieces of cardboard I screwed the board.

title: User:Kmashaye5220/enes100/myWork2


text:
User:9484syoon/enes100/personal work page2

Write problem/project Goal
What is your wording of the overall problem/project goal?

My First Task
What are you going to do for the team this first weekend?

Summary of actual work over first weekend
How is what you did different than what you planned?

Week1 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Second Task
Record what you are planning on doing for the team during the second weekend.

Summary of actual work over second weekend
How is what you did different than what you planned?

Week2 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Third task
Record what you are planning on doing for the team during the third weekend.

Summary of actual work over third weekend
How is what you did different than what you planned?

Week3 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Fourth task
''Record what you are planning on doing for the team during the final weekend of project work. ''

Summary of actual work over fourth weekend
''How is what you did different than what you planned? Crane''

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).


text:
User:Mir07/mywork2

''This is designed for a person working on a project for 4 weeks as part of a 3 credit class. Please copy this form to your user page. Then delete everything in italics when filling out this form.''

Write problem/project Goal
To use the kinect Gestures to control a toy car.

My First Task
Get the Kinect and arduino to work together. Get the arduino to get the kinect skeleton points and convert them into control data which then can be used to move or rotate servos or certain parts of the car ie right left movement and acceleration.

Summary of actual work over first weekend
My task was to get the kinect gesture feature to work with the arudino. The gestures work as controller points which the arudino passes to any object ie car and moves it, either right or left. At this point I just wanted to get the kinect gesture feature to work with the arduino to pass parameters to the servos. Using left and right hand movements in Kinect to control the rotation of two servos tied to the Arduino, which in turn moves the left and right servos. The code for this is written in Visual Basic with gets the gesture points from the kinect skeleton and converts them into arduino parameters that moves the servos.

Week1 Narrative
The following steps will show how the kinect and arduino are able to communitcate with each other to make the servos move, based on gestures alone.

Hardware Required: 1- Microsoft Kinect 2- Arduino 3- Micro Servos/or stepper motor 4- Breadboards and wires

Setup: Drivers and software (some drivers and software are required to get the kinect and the arduino to work together with the kinect gesture feature). 1-download and install the Microsoft development kit from http://www.microsoft.com/en-us/kinectforwindows/develop/ 2-download and install the arduino software from http://www.arduino.cc/en/Main/software 3-download and install the coding4fun kinect toolkit from http://c4fkinect.codeplex.com/releases/view/76271#DownloadId=300233 4-download and install Microsoft wisual basic Express from http://www.microsoft.com/visualstudio/en-us/products/2010-editions/visual-basic-express 5- install .NET Framework 4 from http://msdn.microsoft.com/en-us/netframework/aa569263 6- Microsoft DirectX SDK - June 2010 or later version from http://www.microsoft.com/download/en/details.aspx?id=8109 7- Install Runtime for Microsoft DirectX 9 http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=35 8- Microsoft Kinect Code4Fun Quickstart VB code (some parts of the code are modified) http://files.ch9.ms/coding4fun/KinectForWindowsSDKQuickstarts.zip

Wiring: The servos will be powered by the Arduino connected to the PC via USB. One servo will be left and the other right. If the right and left are interchanged just change a line of code instead of rewiring Left = Arduino Digital Pin 9 Right = Arduino Digital Pin 11

Running the code to move servos with kinect gestures: 1- Download the "ArduinoXYZ.ino" file from http://www.instructables.com/id/Kinect-controls-Arduino-wired-Servos-using-Visual-/ and load it into the Arduino UNO via the Arduino IDE 1.0.

2- Download KinectForWindowsSDKQuickstarts.zip from http://www.instructables.com/id/Kinect-controls-Arduino-wired-Servos-using-Visual-/

3- Find and extract the SkeletalTrackingVB folder and place it under the Projects folder the Visual Basic 2010 Express or visual studio 2010.

4- From Visual Basic 2010 IDE explorer, double click on MyProject. There will be a with a project configuration page.

5- Click on the References tab.

6- Search for Microsoft.Research.Kinect and delete it.

7- Search for Code4Fun.Kinect.wpf and delete it.

8- Click on Add.

9- Click the Browse tab.

10- Search for and add the newer versions of those files which you have downloaded part of the latest Microsoft Kinect SDK and Coding4Fun Kinect Toolkit zip files.

11- Download MainWindow.xaml and MainWindow.xaml.vb.

With the Kinect and Arduino connected, run the test the program.Important: The COM port field on the main application window is set to 16. Change this to match the Arduino's COM port on your PC.

With the code the servos connected to the arduino can move with hand gestures using kinect.

My Second Task
For my second task I want apply the techniques I applied to moving the servos to a RC toy car. I want to control all the movements and acceleration of a car based on gestures from the kinect. Possibly reverse engineer a remote controller to work with the RC car.

Summary of actual work over second weekend
Researched as to how I can move a car based on kinect gestures. I was not able to reverse engineer an RC car controller at this point, however If was able to get some idea as to how this could work. I tried a few things, which I will cover below, and I think I may be able to communicate between the arduino and the RC contorller through serial communication. This will allow me to communicate with the kinect which is plugged to the computer; with the ardunio which is also connected to the computer. Serial communication allows hardware to communicate with each other through a medium (pc).

Week2 Narrative
Main idea: Kinect Controls RC Car 1) Kinect and arduino are connected to the PC via USB. 2) C# or python code on pc interprets kinect’s gesture based inputs then commands arduino to pulse the controls within the RC car, i.e. right/left motors and acceleration is controlled with the kinect gestures. 3) Arduino just waits for the serial input from the PC to control RC car movements. 4) The Arduino receives commands from its Serial interface and toggles its output to control the car’s remote controller. The Arduino receives commands from its Serial interface and toggles its output to control the car Sketch that the Arduino runs in conjuction with the C# code which converts gesture based data from the kinect and sends it to the controller. Important: the digitalWrite(pin, LOW); always precedes the digitalWrite(pin, HIGH); command? This is to prevent conflicting commands from being sent to the car(e.g. Forwards and Backwards simultaneously).

Hardware: 1) Arduino 2) Breadboarded

Software: 1) Everything from week 1 2) Arduino Sketch

My Third task
Reverse engineer RC Controller and sync it with the arduino so that the data from the kinect can be sent to the controller rather than the car. This would increase the car allowing it to move without being plugged to the pc via usb.

Summary of actual work over third weekend
Researched on how to hook up an RC Controller with arduino

Week3 Narrative
Each output pin controls current passing through an opto-isolator, which isolates the circuit of the Arduino from that of the car’s controller. This allows the Arduino to control the car, despite both circuits having different electrical potentials. The switches at the top of the above diagrams are placeholders for the actual control mechanism of the car. A current-limiting resistor is used so as to provide a current within the operating parameters of the opto-isolator. The breadboarded circuit looks like this:

The jumper cable and pin information can gotten from the is code.

int pinRight = 11; int pinLeft = 10; int pinForward = 9; int pinReverse = 8;

void setup Serial.begin(9600); pinMode(pinRight, OUTPUT); pinMode(pinLeft, OUTPUT); pinMode(pinForward, OUTPUT); pinMode(pinReverse, OUTPUT); } void loop { if(Serial.available > 0){ int tmpByte = Serial.read; switch(tmpByte){ case 'w': // Move car FORWARDS digitalWrite(pinReverse, LOW); digitalWrite(pinForward, HIGH); break; case 's': // Move car in REVERSE digitalWrite(pinForward, LOW); digitalWrite(pinReverse, HIGH); break; case 'a': // Turn steering wheels LEFT digitalWrite(pinRight, LOW); digitalWrite(pinLeft, HIGH); break; case 'd': // Turn steering wheels RIGHT digitalWrite(pinLeft, LOW); digitalWrite(pinRight, HIGH); break; case '_': // STOP ALL motion digitalWrite(pinReverse, LOW); digitalWrite(pinForward, LOW); // The missing break; here is entirely intentional. case 'x': // Move steering wheels STRAIGHT digitalWrite(pinRight, LOW); digitalWrite(pinLeft, LOW); break; default: break; } } The Kinect data is received and processed in the C# application that dispatches instructions over the serial port.

My Fourth task
Find C# code to convert gestures to data that the arduino can interpret and send to the RC controller

Summary of actual work over fourth weekend
Used a different approach to make the rc-controller work with the arduino and kinect. Instead of working with RC-Car, I started working with RC-Helicopter that need no calibration of controller. However what each frequency does needs to be determined ie speed, right-left, up-down, all depend on the frequency of the controller. This part build on the previous weeks so the arduino and kinect serial communication works in the same way, except for the addition of IR LED's

Week4 Narrative
Hardware:
 * 1-kinect
 * 2-Arduino Board
 * 3-resistors
 * 4-resistors
 * 5-transistors
 * 6-IR LEDs

Software: Can be download from this web site, this is the code that gets the RC- helicopter flying
 * 1-http://codingfun.collinboy.net/S107_IR_Code.ino
 * 2.Microsoft Kinect SDK software: to determine the location of hands relative to head and hips. This gaves a y-coordinate distance that could be scaled from 0 to 127.

Process:
 * 1- Get the Arduino to communicate with the helicopters controller, the frequency of the controller is 38 khz signal(signals are transmitted over a 38 khz signal)

'''Note:Channel "A" uses Throttle Values 0 to 127. Channel "B" uses Throttle Values 128 to 255.'''

Format: This process makes the arduino code work with the transmission.
 * 1.Start Signal: 2000 us
 * 2.Pause: 2000 us
 * 3.Rudder Signal: 8 bits of transmission (for example 127 is "01111111", 63 is "00111111")
 * 4.Elevator Signal: 8 bits of transmission
 * 5.Throttle Signal: 8 bits of transmission
 * 6.Trim Signal: 8 bits of transmission
 * 7.End Signal: 300 us

In the code provided all it does is feed the void Transmit with integer values between 0 and 127 (or 128 to 255 for Channel "B"

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Mir07/mywork2


text:
Engineering Projects/Illuminate Clothing/Howard Community College/spring2012

 * /I1550INC/
 * /I2550INC/


text:
User:Javiereduturcios/myWork2

''This is designed for a person working on a project for 4 weeks as part of a 3 credit class. Please copy this form to your user page. Then delete everything in italics when filling out this form.''

Write problem/project Goal
Repairing a power supply, which is already converted to a LAB one

My First Task
read the wikiversity of previous semester classes and do research on power supply

Summary of actual work over first weekend
I research about Power supplies and i found a tutorial on how to do it.

Week1 Narrative
During my first week working on power supply my classmate said that there was only one power supply left. The so the first thing we did is to take the screws off. This power supply is a lab power supply so our job was to fix it. After taking all the screws we had to check that there is voltage in the input. There was voltage in the input. Then later we had to follow the circuits and see were there is no circuit. It was kind of challenging. On Thursday when we did our presentation Mr. Foerster said that we should stop working on it because it was very difficult for us and even for him. We when down stairs to bring computers and take their power supply. To be able to take the power supply of the computer one must first take the CPU. The dell computers have a slide that allows to open the lid. After opening the lid one should pull all the cables that are connect to the computer and the power supply. Later remove all the screws that are near the power supply. Then after removing the screws pull the power supply and one is ready to work on it. The next thing i did was to cut the cables that were sticking out to make them smaller. Later I remove the screws from the shield power supply to be able to make the holes on it. The holes can be done anywhere. I thought that i would be easier to do make them in the shield of the power supply. I put the shield of the power supply in the vise grip that is the corner of one of the wooden tables. I put the smallest drill bit in the drill to begin with and gradually increasing the size of the drill bit. I had a cup of water near me so that when metal chips start coming the water will stop them from getting into the air. I made the holes as big as the circumference of the binding post. After putting the binding post to the power supply shield i started working with the cables. I connected the 5 ohm resistor to a black wire and a red wire. Then i started put all the black wires together and i put the green wire with them. After i took all the white and yellow cables together. I took the voltage and it was 11.98. So later i gather all the orange wires and at last all the read wires together. When I took the voltage of the red wires it was 5.09volts. Then when I took the voltage of the orange wires there was no voltage. At last i took the voltage of the white and yellow wires and voltage was 5.03volts. This is strange because previously I had a voltage of 11.98volts. The voltage did not was not what i thought it would be. The only wires that are working properly are the red and black wires The have the proper voltage. The solution i have to this problem is that i confused some of the red wires with the orange wires this could affect the voltage of the white and yellow wires.

My Second Task
my second task is going to figure out why the voltage was not what i expected

Summary of actual work over second weekend
I figure out why I did not get correct voltage. I had some of the orange cables mixed with the red cables.

Week2 Narrative
During this second week I was able to discover why I did not get the voltage that I expected. I had some of the orange cables mixed with the red cables. I also had the only green wire tied up with all the black wires. It should have only been to one black wire. So I began to separate the orange and red cables. Later I tied the only green cable to one black wire. After with electrical tape i taped all the orange and red cables. I cut a large wire of a black, red, orange, blue and white wires. This will be easier when I tried to solder the cables to the binding post. I tied with electrical tape the large wires with the small wires. I started to strip the big wire. I put the cables in the binding posts and start to solder. I solder the black binding post to the black wire. the orange (3.3volts) is solder to the following binding post. Then the red cable(5volts) was solder besides the orange cables. After the white and yellow cable (12 volts) was solder to the following binding post. At last the blue cable was the last one. I did it with order because I wanted to from least to greater on the positive volts. After all The positive volts were done I put the only negative volt. When everything was completely solder I put the power supply shield back on. I tighten the screws and tested if it really works. It is important to tested because other groups complain that the power supply is not working. I got the results the expected results. Then I label the binding post. Starting with the black and going on (G, 3.3, 5, 12 and -12). this is going to help people know the voltage that is expected from each binding posts. Now this power supply works perfectly fine! I also elaborate to 6 tutorials on power supply.
 * Testing is the power supply works
 * Testing if the power supply does not work
 * Tutorial to drill holes on the power supply shield
 * Tutorial on charging the drill's battery
 * Tutorial on removing the power supply from the computer
 * Tutorial on measuring the voltage with the multimeter

My Third task
I am going to work with a rectangular power supply the one that i worked before was square.

Summary of actual work over third weekend
I started working on the rectagular power supply. I took off the power supply shield and reduce the sizes of the wires.

Week3 Narrative
During my thrid week working on my power supply I am almost ready. I the first thing i did was to take the shield off the power supply. Then I started drilling holes. Then the next thing was to remove the gray wire. This wire is unecessary. With the wire stripper I cut the gray wire. After cutting the wire I tape the remaining piece with electrical tape. The purple wire is also useless. I remove it with the wire strippers. The left over that is still left in the power supply I taped it with electrical tape. To be able to turn the power supply on the green wire must be connected to one black wire. I reduced the size of the wires because they were very big compared to the small power supply. Then i started stripping the wire. I put them together and tape them with the electrical tape. Then I gather all the black wires and tape them. I had to reduce the size of each wire because i was to long. Later I start stripping one by one each black wire. i connected them together. With a long piece of the black wire that i cut previously I started stripping it. I tied up that black wire with the rest. then I taped it. I started to the same process for the yellow, orange and red wires. The blue wire is not necessary to this because there is only one wire.

My Fourth task
My next task will be to solder the wires and test it if it works

Summary of actual work over fourth weekend
I was not able solder the wires because I did not have a solder home.

Week4 Narrative
I took the challenge to work with a rectangular power supply. I this week I had to solder the wires in the binding post to secure that the power supply was going to work. 1. I had the long wires connected to the short wires. 2. I Grab the wire stripper and start stripping the long wires. 3. I connected the long wires to the binding post. 4. I set up the solder to heat up. (This took a couple if minutes). 5. I the solder wire. 6.I cut a big piece of the soldering iron. 7. When the solder was heated up I started soldering the wires into the binding posts. When I was done with the binding post I was going to close the power supply and tested. I had a problem: I was not able to close the power supply because there is no room. The possible solutions that I came with are 1. Reduce the size of the wires. 2. Leave the long wires inside only. 3. Put the fan on top. After I tested each of the my solutions I was still not able to close the power supply. I had to examine very carefully why I was not able to close the power supply. The problem was is that the place were I drill the holes and put the binding post were not allowing it to close. The possible solution that I came up with that I need to build a box for the board. I also elaborate 7 tutorials on the power supply:
 * Binding_post_not_allowing_it_to_close.JPG
 * Fan not allowing it to close.JPG

 * Tutorial on how to convert ATX Power Supply to lab power supply
 * Tutorial on how to solder
 * Tutorial on how to put the cables together
 * Tutorial on how to turn the power supply
 * Tutorial on reducing the size of the the purple wire safety
 * Tutorial on reducing the size of the gray wire in a safe way
 * Tutorial on preparing the multimeter for start measuring the voltage

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Javiereduturcios/myWork2


text:
Engineering Projects/Illuminate Clothing/Howard Community College/spring2012/I1550INC

Problem Statement

 * 1.Reverse engineer the EL wire driver hardware.
 * 2.Troubleshoot the EL wire drivers that are not working.
 * 3.Design circuit to enable the arduino to control the EL wire.
 * 4.Tear apart old lillypad diode circuit and sew another one.
 * 5.Design sewing system so lillypad conductive thread does not short out.
 * 6.Create a new script or improve current lillypad arduino LED program.

Team Members

 * Navid Jahanpour
 * Chris Nunez

Summary
The EL Wire is driven by a 180 volt, 3KHz signal that is developed from two AA batteries.

The problem with the EL Wire drivers that were not working is that a transistor went bad on them. A transistor was replaced that solved the problem. A tutorial on troubleshooting transistors was identified as well as an introduction to transistors.

The circuit to enable arduino control of the EL wire was begun. Directly connecting the arduino to the main transformer does not work. The arduino can not supply enough power out of it's digital pins and the entire arduino board shuts down.

The old sewing of LED's on cloth did not work because the wires were shorting out all the time. A new shirt was found and a new simple pattern was created. The old software was complicated. A new simple program was created to begin learning to control many LED's.

Story
we have the 3 driver, for control led this driver change the domination of the voltage from 3 volt to 180 volt with low amp. the led kit work in 3 level on off, and flashing i have to find way that control the led with adrino board and program, but i have the problem because the adrino have 3 volt out put and i need 180 volt to work,so first i try to understand how the regular board working. i analysis the regular board that we have, and i understand that, its the amplify and voltage level changer board.i have the transformer to change the voltage domination, so i pike up the transformer with solid heat and i contact the transformer to the adrino board, but then i find the new problem. when i contact the transformer to the adrino i have the current over load problem.so i have to design the interface for contact the adrino to the transformer and control the led.

The Lilypad Ardiuno was able to contact all LED's with the new script. My mother in law taught me how to sew tightly so the conductive thread does not short out each other. The new script has 20 led settings on it. we can add more if there were more connections on the lily pad. The script tells the lilypad to turn on two leds at a time at every 6 led. The last led will turn off. This gives it a circular motion. we can vary the speed how ever we like.

Decision List
1. for first week i analysis the driver of the led and out put voltage of the this board.

2.for second i try to understand how i can use the adrino board for control the led and what the problem when i contact the adrino board to the transformer that i pike it from the regular driver that control the led.

3.for end week i try find the problem of the driver board that we have for control the led already, and find the not working elctronic device (PNP TRANSISTOR)

1. Learn how to program an Lilypad arduino with the arduino software. 2. Come up with ideas on how to tightly secure the conductive thread and stop shorting out the ardiono. 3. Display the project and receive ideas. 4. Create new scripts. 5. Try to use the LED project from the other team mate and combine projects.

Material List
List of the materials

1.driver of the led (black box) 2.some kind of the pnp transistor. 3.voltmeter. 4.adrino board. 5.some kind of the wire and conectores. 6.oscilloscope 7.Lily pad arduino 8.Conductiove thread 9.Needle 10.Arduino software 11.LED's

for next worker we need these tools: 1. 2 to 180 3khz volt transformer

Software List
Arduino Program

Time
60 hours

Tutorials
i had the some tutorials for transistor and control the the transistor i put here and i have the some tutorials about the driver and interfacing leds that i put here. http://www.youtube.com/watch?v=ApQt1rz8urU&feature=related

http://www.youtube.com/watch?v=JvExbDNtP0U&feature=related

Lilypad Arduino Tuturial

Next Steps
the next step for this project is interface and design the circuit to contact the adrino board to the transformer:

1. mossfet transistor 2.any 2/180 volt transformer. 3.Get the Lilypad arduino to run LED's strips 4. Secure threading better


text:
User:Itate/enes100/My Work 2

''This is designed for a person working on a project for 4 weeks as part of a 3 credit class. Please copy this form to your user page. Then delete everything in italics when filling out this form.''

Write problem/project Goal
What is your wording of the overall problem/project goal?

Illuminate a piece of clothing using LED controlled by an arduino.

My First Task
What are you going to do for the team this first weekend?

Studied old teams work done for this project and other projects online similar to this found a tutorial on it here, will share it with the other team members during class.

Summary of actual work over first weekend
How is what you did different than what you planned?

Week1 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Second Task
Record what you are planning on doing for the team during the second weekend.

Summary of actual work over second weekend
How is what you did different than what you planned?

Week2 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Third task
Record what you are planning on doing for the team during the third weekend.

Summary of actual work over third weekend
How is what you did different than what you planned?

Week3 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Fourth task
''Record what you are planning on doing for the team during the final weekend of project work. ''

Summary of actual work over fourth weekend
How is what you did different than what you planned?

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Itate/enes100/My Work 2


text:
User:Christopher.nunez/enes100/illuminationProject

illuminationTeamPage

Write problem/project Goal
My overall problem for this project is to figure out a way to not have the conductive threading to be able to overlap each other with out shorting out the unit and to figure out the software scripting. I will look at past documentation for this project and see where I can improve and figure out my problem.

My First Task
Study the lily pad arduino and look over the software scripting.

Summary of actual work over first weekend
It took some time but I found something that looks like the code for the lilypad arduino. I tried inputing the code, but it didn't work. I showed the professor the issue, and he told me to choose the edit option on the screen then copy and past it.

Week1 Narrative
Found the code for the lilpad arduino that the last team used. This link will show the code Lilypad CodeThanks to Truondat, I am able to ge the arduino to do multiple things with the LED's. I am also learning what part of the code does what. This was very useful for me!

My Second Task
Start sewing the LED's in a pattern that makes a nice design when the lilypad operates. Then figure out how to evade wires from touching each other.

Summary of actual work over second weekend
How is what you did different than what you planned?

Week2 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Third task
Record what you are planning on doing for the team during the third weekend.

Summary of actual work over third weekend
How is what you did different than what you planned?

Week3 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Fourth task
''Record what you are planning on doing for the team during the final weekend of project work. ''

Summary of actual work over fourth weekend
Even though I thought tightning the threading on the conductive thread would stop the shorting out of the arduino. It still would loosen and not light LED. Also the Script that I try to use from the last project team was not very good. I decided to make my own.

Week4 Narrative
Had my Mother in law show me how to sew and she shown me how to double loop the thread around the led's and the arduino. She also stated the thread isn't as durable as regular clothing thread. So the thread seems to fall apart sometimes. After sewing all the LED's to the correct positions on the arduino. I started creating the new script. I added 20 led's to the script and had the program turn on 2 LED's at the same time every 6 led. When the next LED turns on the program turns off the led before it. It goes around a circle at the rate we set it at. We can set the rate at any speed we want. success! Only problem I am currently having is sometime the thread comes a little loose. also the Thread seems to touch the USB adapter copper. We will have to get the battery connection working in order to avoid this.

Video: My Video

Code: LilyPad Code

Here are a tutorial site I used:

http://www.instructables.com/id/LilyPad-Arduino-Blinking-Bike-Safety-Patch/ http://blog.craftzine.com/archive/2009/04/craft_video_lilypad_arduino_bi.html http://blog.craftzine.com/archive/2009/03/craft_video_lilypad_arduino_10.html

Complete Team Page
illuminationTeamPage


text:
User talk:Christopher.nunez

Created New project Page and attached to team page - Chris nunez

title: User talk:Christopher.nunez


text:
Talk:Engineering Projects/Illuminate Clothing/Howard Community College/spring2012/I1550INC

Created new Team Page - Chris Nunez 100 points project 2 grading 1sfoerster (talk) 18:17, 17 April 2012 (UTC)


text:
User talk:Christopher.nunez/enes100

Created New Project page for illumination - Chris Nunez

title: User talk:Christopher.nunez/enes100


text:
User:Brianwcallaghan/myWork2

Write problem/project Goal
Over the last 4 weeks, we got a design mostly nailed down and parts were cut. The next 4 weeks are about crank shaft design, assembly of the Beest and powering it.

My First Task
Work on plan for crank.

Summary of actual work over first weekend
Stuck to plan.

Week1 Narrative
Talked with some co-workers and got input. They suggested a circle instead of an arm for balance. I think this is a good idea. Also suggested using a secondary crank without cams to turn the first one. This would help with torque if it had bands to each cam, individually.

My Second Task
I am going to take home some parts and build one more leg assembly. This time I am going to take pictures and make a tutorial.

Summary of actual work over second weekend
Stuck to the plan mostly. I did get a little off target with some experimentation on the crank shaft.

Week2 Narrative
I started on Friday night with taking pictures of the parts. I had built one leg set before, but the process was not recorded. This time, I followed the same method, but took careful note of each step in the process. With this second build, I left the crank portion off. The reason being that this leg set is for assembly on the whole Beest itself, not a demonstrative prototype.

I did not bring enough parts home to make more than one, so I put the one I made before together with the new one using pieces of coat hanger for the body bars and another bent coat hanger as a make-shift crankshaft. It did not move very smoothly due to the inferiority of the crankshaft material (I didn't expect it to work at all so I was semi-pleased). However, you can see the basic idea of the Beest's movement in this short video of my 2 leg sets at work.

After making that video, I got to work on making a tutorial on How to Assemble a StrandBeest Leg Set. This is not a tutorial on building an entire strandBeest, but how to build the legs so that they are ready to put together with the other soon to be built leg sets and Crank Shaft. I uploaded the photos I took of the parts and of the various stages of the build and incorporated them into the tutorial as well as a few video links. Link below
 * Leg Assembly Tutorial

Lastly, I did a quick CAD drawing of a circle with some drill points on it, that we could cut out on the CNC router if we could get another piece of wood. These would be useful for the crankshaft.

My Third task
Record what you are planning on doing for the team during the third weekend.

Summary of actual work over third weekend
How is what you did different than what you planned?

Week3 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Fourth task
''Record what you are planning on doing for the team during the final weekend of project work. ''

Summary of actual work over fourth weekend
How is what you did different than what you planned?

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Brianwcallaghan/myWork2


text:
User:Dalimatr

Dalimatr

ar:مستخدم:Dalimatr cs:Uživatel:Dalimatr de:Benutzer:Dalimatr el:Χρήστης:Dalimatr es:Usuario:Dalimatr fi:Käyttäjä:Dalimatr fr:Utilisateur:Dalimatr it:Utente:Dalimatr ja:利用者:Dalimatr pt:Utilizador:Dalimatr ru:Участник:Dalimatr sv:Användare:Dalimatr

title: User:Dalimatr


title: File:Cordic.vhdl.20120316.pdf


text: File:Cordic tb.vhdl.20120316.pdf

title: File:Cordic tb.vhdl.20120316.pdf


text: File:Cordic pkg.vhdl.20120316.pdf

title: File:Cordic pkg.vhdl.20120316.pdf


title: File:Sampling.2.B.BandPass.20120316.pdf


text:
File:Corecontrol outside.JPG

Licensing
for school project

title: File:Corecontrol outside.JPG


text:
Collaborative play writing/Warnings

Warnings

SCENE I

The dining room of James Knapp’s flat in the Bronx, N. Y. City. To the left is a door opening into the main hall, farther back a chair, and then a heavy green curtain which screens off an alcove probably used as a bedroom. To the right a doorway leading into the kitchen, another chair, and a window, with some plants in pots on the sill, which opens on a court. Hanging in front of the window is a gilt cage in which a canary chirps sleepily. The walls of the room are papered an impossible green and the floor is covered with a worn carpet of nearly the same color. Several gaudy Sunday-supplement pictures in cheap gilt frames are hung at spaced intervals around the walls. The dining table with its flowered cover is pushed back against the middle wall to allow of more space for free passage between the kitchen and the front part of the flat. On the wall above the table is a mantle piece on the middle of which a black marble clock ticks mournfully. The clock is flanked on both sides by a formidable display of family photographs. Above the mantle hangs a “Home Sweet Home” motto in a black frame. A lamp of the Welsbach type, fixed on the chandelier which hangs from the middle of the ceiling, floods the small room with bright light. It is about half-past eight of an October evening. The time is the present. Mrs. Knapp is discovered sitting at the end of the table near the kitchen. She is a pale, thin, peevish-looking woman of about forty, made prematurely old by the thousand worries of a penny-pinching existence. Her originally fine constitution has been broken down by the bearing of many children in conditions under which every new arrival meant a new mouth crying for its share of the already inadequate supply of life’s necessities. Her brown hair, thickly streaked with gray, is drawn back tightly over her ears into a knot at the back of her head. Her thin-lipped mouth droops sorrowfully at the corners, and her faded blue eyes have an expression of fretful weariness. She wears a soiled grey wrapper and black carpet slippers. When she speaks, her voice is plaintively querulous and without authority. Two of the children, Lizzie and Sue, are seated on her left facing the family photos. They are both bent over the table with curly blond heads close together. Under Lizzie’s guidance Sue is attempting to write something on the pad before her. Both are dressed in clean looking dark clothes with black shoes and stockings.

LIZZIE—That’s not the way to make a “g.” Give me the pencil and I’ll show you. (She tries to take the pencil away from Sue.)

SUE—(resisting and commencing to cry) I don’ wanta give you the pencil. Mama-a! Make her stop!

MRS. KNAPP—(wearily) For goodness’ sake stop that racket, Sue! Give her the pencil, Lizzie! You ought to be ashamed to fight with your little sister—and you so much older than her. I declare a body can’t have a moment’s peace in this house with you children all the time wranglin’ and fightin’.

SUE—(bawling louder than ever) Mama-a! She won’t give it to me!

MRS. KNAPP—(with an attempt at firmness) Lizzie! Did you hear what I said? Give her that pencil this instant!

LIZZIE—(not impressed) I wanta show her how to make a “g” and she won’t let me. Make her stop, Mama!

SUE—(screaming) I did make a “g!” I did make a “g!”

LIZZIE—Ooo! Listen to her tellin’ lies, Mama. She didn’t make a “g” at all. She don’t know how.

SUE—I do! Gimme that pencil.

LIZZIE—You don’t. I won’t give it to you.

MRS. KNAPP—(aggravated into action gets quickly from her chair and gives Lizzie a ringing box on the ear) There, you naughty child! That will teach you to do what I say. Give me that pencil. (She snatches it from Lizzie’s hand and gives it to Sue.) There’s the pencil! For goodness sake hush up your cryin’! (Sue subsides into sobbing but Lizzie puts her hand over the smarting ear and starts to howl with all her might.)

SUE—(whimpering again as she discovers the paint of the pencil has been broken off) Look Mama! She broke the pencil!

MRS. KNAPP—(distracted) Be still and I’ll sharpen it for you. (turning to Lizzie and taking her on her lap) There! There! Stop cryin’! Mama didn’t mean to hurt you. (Lizzie only cries the harder.) Stop crying and I’ll give you a piece of candy. (Lizzie’s anguish vanishes in a flash.) Kiss mama now and promise not to be naughty any more!

LIZZIE—(kissing her obediently) I promise. Where’s the candy Mama?

SUE—(no longer interested in pencils) I wanta piece of candy too.

MRS. KNAPP—(goes to the kitchen and returns with two sticky chunks of molasses candy) Here Lizzie! Here Sue! (Sue manages with some effort to cram the candy into her small mouth.) Neither one of you said “thank you.” (Lizzie dutifully mumbles “thanks” but Sue is beyond speech.) I declare I don’t know what I’ll do with you children. You never seem to learn manners. It’s just as if you were brought up on the streets—the way you act. (The clock strikes 8.30 and Mrs. Knapp looks at it gratefully.) There, children. It’s half-past eight and you must both go to bed right away. Goodness knows I have a hard enough time gettin’ you up for school in the morning.

SUE—(having eaten enough of her candy to allow of her voicing a protest) I don’ wanta go to bed.

LIZZIE—(sulking) You said you’d let us stay up to see Papa.

SUE—I wanta see Papa.

MRS. KNAPP—That will do. I won’t listen to any more of your talk. You’ve seen your father all afternoon. That’s only an excuse to stay up late. He went to the doctor’s and goodness knows when he’ll be back. I promised to let you sit up till half-past eight and it’s that now. Come now! Kiss me like two good little girls and go straight to bed. (The two good little girls perform their kissing with an ill grace and depart slowly for bed through the alcove.)

MRS. KNAPP—Mind you don’t wake the baby with your carryings-on or I’ll tell your father to spank you good. (She has an afterthought.) And don’t forget your prayers! (She sinks back with a deep sigh of relief and taking up an evening paper from the table, commences to read. She has hardly settled back comfortably when shouts and the noise of running steps are heard from the stairs in the hallway. Then a rattling tattoo of knocks shakes the door and a girl’s voice laughingly shouts thro’ the key hole, “Open up Ma!”)

MRS. KNAPP—(going quickly to the door and unlocking it) Hush up your noise for goodness sakes! Do you want to wake up the baby? I never saw such children. You haven’t any feelin’ for your mother at all.

(Charles and Dolly push hurriedly into the room. Mrs. Knapp locks the door again and resumes her seat at the table. Charles is a gawky, skinny youth of fifteen who has outgrown his clothes, and whose arms and legs seem to have outgrown him. His features are large and irregular; his eyes small and watery-blue in color. When he takes off his cap a mop of sandy hair falls over his forehead. He is dressed in a shabby grey Norfolk suit.)

(Although extremely thin, Dolly is rather pretty with her dark eyes, and brown curls hanging over her shoulders. She is dressed neatly in a dark blue frock with black shoes and stockings and a black felt hat. Her ordinarily sallow city complexion is flushed from the run upstairs.)

DOLLY—(rushing over and kissing her mother—mischievously) What do you think I saw, Ma?

CHARLIE—(in a loud voice —almost a shout) What do you think I saw, Mom?

MRS. KNAPP—For heaven’s sake, Charlie, speak lower. Do you want the people in the next block to hear you? If you wake up the baby I shall certainly tell your father on you. Take off your hat when you’re in the house! Whatever is the matter with you? Can’t you remember anything? I’m really ashamed of you—the way you act.

CHARLIE—(taking off his cap) Aw, what’s the matter, Mom? Gee, you’re got an awful grouch on tonight.

MRS. KNAPP—Never mind talkin’ back to your mother, young man. Why shouldn’t I be cranky with you bellowin’ around here like a young bull? I just got the baby to sleep and if you wake her up with your noise heaven knows when I’ll get any peace again.

DOLLY—(interrupting her—with a laughing glance at Charlie) You can’t guess what I saw, Ma.

CHARLIE—(sheepishly) Aw, all right for you. Go ahead and tell her if you wanta. I don’t care. I’ll tell her what I saw too.

DOLLY—You didn’t see anything.

CHARLIE—I did too.

DOLLY—You didn’t.

MRS. KNAPP—For goodness sake stop your quarrelin’! First it’s Lizzie and Sue and then it’s you two. I never get time to even read a paper. What was it you saw, Dolly? Tell me if you’re going to.

DOLLY—I saw Charlie and that red-headed Harris girl in the corner drug store. He was buying her ice cream soda with that quarter Pop gave him.

CHARLIE—I was no such thing.

DOLLY—Oh, what a lie! You know you were.

MRS. KNAPP—You ought to be ashamed of yourself, you big grump, you, goin’ round with girls at your age and spendin’ money on them. I’ll tell your father how you spend the money he gives you and it’ll be a long time before you get another cent.

CHARLIE—(sullenly) Aw you needn’t think I’m the only one. (pointing to Dolly) I saw her down in the hallway with that Dutch kid whose father runs the saloon in the next block. It was dark down there too. I could hardly see them. And he’s cross-eyed!

DOLLY—He is not.

CHARLIE—Aw g’wan, of course he is. He can’t see straight or he’d never look at you.

DOLLY—He’s better than you are.

CHARLIE—(losing control of his voice and shouting again) I’ll hand him a punch in the eye the first time I see him. That’s what I’ll do to him, the Dutch boob. And I’ll slap you in the nose too if you get too fresh. (Dolly starts to cry.)

MRS. KNAPP—(rising up swiftly and giving him a crack over the ear with her open hand) That’ll teach you, young man! Don’t you dare to lay a hand on your sister or your father will whip you good.

CHARLIE—(backing away with his hand on his ear—in a whimper) Aw, what are you always pickin’ on me for? Why don’t you say something to her?

MRS. KNAPP—(turning to the still tearful Dolly) And you, Miss! Don’t you let me hear of you bein’ in any dark hallways with young men again or I’ll take you over my knee, so I will. The idea of such a thing! I can’t understand you at all. I never was allowed out alone with anyone,—not even with your father, before I was engaged to be married to him. I don’t know what’s come over you young folks nowadays.

DOLLY—It—wasn’t—dark.

MRS. KNAPP—It makes no difference. You heard what I said. Don’t let it happen again. (Dolly wipes her eyes and makes a face at Charlie.)

CHARLIE—(his tones loud with triumph) It was awful dark. She’s liein’ to you, Mom.

MRS. KNAPP—Hold your tongue! I’ve heard enough from you. And don’t yell at the top of your voice. You don’t have to shout. I’m not deaf.

CHARLIE—(lower) All right, Mom. But I’ve got into the habit of talking loud since Pop’s been home. He don’t seem to hear me when I talk low.

DOLLY—That’s right, Ma. I was talking to him this morning and when I got through he didn’t know half that I’d told him.

MRS. KNAPP—Your father has a bad cold and his head is all stopped up. He says he hasn’t got a cold but I know better. I’ve been that way myself. But he won’t believe me. So he’s gone to pay five dollars to an ear specialist when all he needs is a dose of quinine—says a wireless operator can’t afford to take chances. I told him a wireless operator couldn’t afford to pay five dollars for nothin’—specially when he’s got a wife and five children. (peevishly) I don’t know what’s come over your father. He don’t seem like the same man since this last trip on the “Empress.” I think it must be that South American climate that’s affectin’ him.

DOLLY—He’s awful cross since he’s been home this time. He yells at Charlie and me for nothing.

MRS. KNAPP—He’d be all right if he could get another job. But he’s afraid if he gives up this one he won’t be able to get another. Your father ain’t as young as he used to be and they all want young men now. He’s got to keep on workin’ or we’d never be able to even pay the rent. Goodness knows his salary is small enough. If it wasn’t for your brother Jim sendin’ us a few dollars every month, and Charlie earnin’ five a week, and me washin’, we’d never be able to get along even with your father’s salary. But heaven knows what we’d do without it. We’d be put out in the streets.

CHARLIE—Is that where Pop’s gone tonight—to the doctor’s?

MRS. KNAPP—Yes, and I don’t know what can be keepin’ him so long. He left after supper right after you did. You’d think he’d spend his last night at home when we won’t see him again for three months.

CHARLIE—Shall I go out and see if I can see him?

MRS. KNAPP—Don’t go makin’ excuses to get out on the street. You better go to bed if you wanta be up on time in the morning—you too, Dolly.

DOLLY—I still got some of my lessons to finish. (There is a sound from the hallway of someone coming up the stairs with slow, heavy steps.)

MRS. KNAPP—Here your father comes now! Get into the parlor, Dolly, if you wanta do your lessons. Don’t let him see you up so late. Keep the light shaded so you won’t wake up the baby. (The steps stop before the door and a knock is heard.) Charlie, go open that door. My feet are worn out from standin’ up all day.

(Charlie opens the door and James Knapp enters. He is a slight, stoop-shouldered, thin-faced man of about fifty. When be takes off his derby hat he reveals a long narrow head almost completely bald with a thin line of gray hair extending over his large ears around the back of his head. His face has been tanned by the tropic sun —but now it seems a sickly yellow in the white glare of the lamp. His eyes are small, dark, and set close together; his nose stubby and of no particular shape; his mouth large and weak. He is dressed in a faded, brown suit and unshined tan shoes. His expression must be unusually depressed as he stands nervously fingering his drooping, gray moustache, for Mrs. Knapp looks at him sharply for a moment, then gets up quickly and goes over and kisses him.)

MRS. KNAPP—(pulling out the arm chair from the other end of the table for him) Come! Sit down! You look all worn out. You shouldn’t walk so much.

KNAPP—(sinking into the chair and speaking in a slow, dull voice) I am a bit tired. (He stares at the flowered patterns of the table cover for a moment—then sighs heavily.)

MRS. KNAPP—Whatever is the matter with you? You look as if you’d lost your last friend.

KNAPP—(pulling himself together and smiling feebly) I guess I’ve got the blues. I get to thinking about how I’ve got to sail tomorrow on that long, lonesome trip, and how I won’t see any of you for three months, and it sort of makes me feel bad. I wish I could throw up this job. I wish I was young enough to try something else.

CHARLIE—(who is slouched down in a chair with hands in his pockets speaks in his lowest, nicest voice) Aw, cheer up, Pop! It won’t seem long. I should think you’d be glad to get out of the cold weather. Gee, I wish’t I had a chance.

KNAPP—(looking at him blankly) Eh? What was that, Charlie? I didn’t quite hear what you said.

CHARLIE—(in his best bellow) I said: Cheer up! It won’t seem long.

KNAPP—(shaking his head sadly) It’s easy for you to say that. You’re young. (The shrill crying of a baby sounds from behind the green curtain of the alcove.)

MRS. KNAPP—(turning on Charlie furiously) There! You’re gone and done it with your big, loud mouth. I told you to speak lower. (turning to her husband) James, I wish you’d do something to make him behave. He don’t mind what I say at all. Look at him—sprawled all over the chair with his long legs stretched out for everybody to trip over. Is that the way to sit on a chair? Anybody’d think you were brought up in a barn. I declare I’m ashamed to have you go anywhere for fear you’d disgrace me.

CHARLIE—You’d needn’t worry. There’s no place for me to go—and if there was I wouldn’t go there with these old clothes on. Why don’t you ball out Pop? He couldn’t hear me, so I had to speak louder.

KNAPP—(with sudden irritation) Of course I heard you. But I wasn’t paying any attention to what you said. I have other things to think about beside your chatter. (Charlie sulks back in his chair.)

MRS. KNAPP—That’s right James. I knew you’d have to tell him where he belongs. You’d think he owned the house the way he acts. (A piercing wail comes from behind the curtain and Mrs. Knapp hurries there saying) Hush! Hush! I’m coming. (She can be heard soothing the baby.)

CHARLIE—(plucking up his courage now that his mother is out of the room) Say, Pop!

KNAPP—Well, Charlie, what is it?

CHARLIE—Please can I have a new suit of clothes? Gee, I need ‘em bad enough. This one is full of patches and holes and all the other kids down at the store laugh at me ‘cause I ain’t got long pants on and these don’t fit me any more. Please can I have a new suit, Pop?

KNAPP—(a look of pain crossing his features) I’m afraid not just now, boy. (Charlie descends into the depths of gloom.) You see, I’ve had to go to this doctor about (he hesitates) the—er—trouble I’ve had with my stomach, and he’s very expensive. But when I come back from this trip I’ll surely buy you a fine new suit with long pants the very first thing I do. I promise it to you and you know I don’t break my promises. Try and get along with that one until I get back.

CHARLIE—(ruefully) All right, Pop. I’ll try, but I’m afraid it’s going to bust if I get any bigger.

KNAPP—That’s a good boy. We haven’t been having much luck lately and we’ve all got to stand for our share of doing without things. I may have to do without a lot— (He turns his face away to hide his emotion from Charlie. A sob shakes his shoulders. Charlie notices it and goes over clumsily and pats his father on the back.)

CHARLIE—Gee, Pop, what’s the matter? I can get along without a suit all right. I wouldn’t have asked you if I thought you was so blue.

KNAPP—Never mind me, boy. I’m just not feeling well, that’s all—something I must have eaten—or a touch of fever. (He glances at the clock.) It’s getting pretty late, Charlie, and you’ve got to be up early in the morning. Better go to bed. Your mother and I have a lot to talk about yet—things which wouldn’t interest you.

CHARLIE—All right, Pop. Good night. I’ll see you in the morning before I go.

KNAPP—Good night and—remember I’m trying to do the best I know how. (Charlie disappears behind the green curtain. Knapp stares at the table, his head between his hands, his face full of suffering. Mrs. Knapp comes back into the room. The baby is safely asleep again.)

MRS. KNAPP—You sent Charlie to bed, didn’t you? (He nods.) That’s right. He stays up altogether too late nights. He’s always prowlin’ around the streets. I don’t know what will become of him I’m sure. Dolly told me tonight she saw him buyin’ soda for that red-headed Harris girl with the quarter you gave him. What do you think of that? And he says he saw her talkin’ in the dark hallway downstairs with some German bartender’s boy. What do you think of that?

KNAPP—(mildly) Where’s the hurt? They’re only kids and they’ve got to have some fun.

MRS. KNAPP—Fun? I’m glad you call it fun. I think it disgraceful.

KNAPP—Come, come, you exaggerate everything so. I see no harm in it. God knows I have enough to worry about without being bothered with children’s pranks.

MRS. KNAPP—(scornfully) You have worries? And what are they, I’d like to know? You sail away and have a fine time with nothin’ to do but eat the best of food and talk to the pretty women in the First Class. Worries? I wish you’d stay home and change places with me—cookin’, scrubbin’, takin’ care of the children, puttin’ off the grocer and the butcher, doin’ washin’ and savin’ every penny. You’d soon find out what worry meant then.

KNAPP—(placatingly) I know you have to put up with a lot, Mary, and I wish I could do something to make it easier for you. (brokenly) I don’t know what’s going to become of us—now.

MRS. KNAPP—Oh, we’ll manage to get along as we have been doin’, I expect.

KNAPP—But—Mary—something terrible has happened. I’m almost afraid to tell you.

MRS. KNAPP—What do you mean? You haven’t lost your job, have you?

KNAPP—I went to see that ear specialist and— (His emotion chokes him; he stops to regain his composure.)

MRS. KNAPP—Yes?

KNAPP—(his voice breaking in spite of himself) He says I’m losing my hearing—that I’m liable to go stone deaf at any moment. (He lets his head fall on his arms with a sob.)

MRS. KNAPP—(coming over and putting her arm around him) There Jim! Don’t take on about it so. All those doctors make things worse than they really are. He’s just tryin’ to scare you so you’ll keep comin’ to see him. Why, you can hear just as well as I can.

KNAPP—No, I’ve noticed how hard it’s been for me to catch some of the messages lately. And since I’ve been home I’ve had a hard time of it now and then to understand the children. The doctor said I would probably be able to hear for a long time yet but I got to be prepared for a sudden shock which’ll leave me stone deaf.

MRS. KNAPP—(quickly) Does anyone on the ship know?

KNAPP—Of course not. If they knew my hearing was going back on me I wouldn’t hold my job a minute. (His voice trembles.) But I’ve got to tell them now. I’ve got to give up.

MRS. KNAPP—You didn’t tell the specialist what you were, did you?

KNAPP—No. I said I was a mechanist.

MRS. KNAPP—(getting up from her chair and speaking in a hard voice) Then why have you got to tell them? If you don’t tell them they’ll never know. You say yourself the doctor told you your hearin’ would hold out for a long time yet.

KNAPP—He said “probably.”

MRS. KNAPP—(an angry flush spreading over her face) Give up your job? Are you a fool? Are you such a coward that a doctor can scare you like that?

KNAPP—I’m not afraid for myself. I’m not afraid of being deaf if I have to be. You don’t understand. You don’t know the responsibility of a man in my job.

MRS. KNAPP—Responsibility? You’ve told me lots of times there was so few messages to send and take you wondered why they had a wireless. What’s the matter with you all of a sudden? You’re not deaf now and even if that liein’ doctor spoke the truth you’ll hear for a long time yet. He only told you about that sudden stroke to keep you comin’ to him. I know the way they talk.

KNAPP—(protesting weakly) But it ain’t right. I ought to tell them and give up the job. Maybe I can get work at something else.

MRS. KNAPP—(furiously) Right? And I suppose you think it’s right to loaf around here until we all get put out in the streets? God knows your salary is small enough but without it we’d starve to death. Can’t you think of others besides yourself? How about me and the children? What’s goin’ to buy them clothes and food? I can’t earn enough and what Charlie gets wouldn’t keep him alive for a week. Jim sends us a few dollars a month but he don’t get much and he ain’t workin’ regular. We owe the grocer and the butcher now. If they found out you wasn’t workin’ they wouldn’t give us any more credit. And the landlord? How long would he let us stay here? You’ll get other work? Remember the last time you tried. We had to pawn everything we had then and we was half-starved when you did land this job. You had to go back to the same old work, didn’t you? They didn’t want you at any telegraph office, did they? You was too old and slow, wasn’t you? Well you’re older and slower than ever now and that’s the only other job you’re fit for. (with bitter scorn) You’ll get another job! (She sits down and covers her face with her hands, weeping bitterly.) And this is all the thanks I get for slavin’ and workin’ my fingers off! What a father for my poor children! Oh, why did I ever marry such a man? It’s been nothin’ but worryin’ and sufferin’ ever since.

KNAPP—(who has been writhing under the lash of her scorn, is tortured beyond endurance at her last reproaches) For God’s sake let me alone! I’ll go! I’ll go! But this is going to be my last trip. I got to do the right thing. (He gets up and pushes aside the green curtain.) Come on! I’m going to bed. (He leaves Mrs. Knapp alone. She lifts her tear-stained face from her hands and sighs with relief as she turns out the gas.)

SCENE II

A section of the boat deck of the S. S. “Empress” just abaft of the bridge. The deck slants sharply downward in the direction of the bow. To the left the officers’ cabins with several lighted port holes. Just in back of them and in the middle of the deck is the wireless room with its door wide open revealing James Knapp bent over his instrument on the forward side of the compartment. His face is pale and set, and he is busy sending out calls, pausing every now and then with a strained expression as if he were vainly trying to catch some answer to his messages. Every time he taps on the key the snarl of the wireless sounds above the confused babble of frightened voices that rises from the promenade deck. To the right of the wireless room on the port side a life-raft. Still farther to the right one of the funnels. The background is a tropic sky blazing with stars. The wires running up from the wireless room to the foremast may be seen dimly lined against the sky. The time is about eleven o’clock.

Captain Hardwick enters hurriedly from the direction of the bridge and walks across to the door of the wireless room where he stands looking in at Knapp. He is a stocky man about fifty dressed in a simple blue uniform. His face is reddened by sun and wind— that is, all of it which is not hidden by his grey beard and mustache. He drums nervously on the door. Knapp pretends not to see him and appears absorbed in his instrument.

CAPT. HARDWICK—No answer yet? (Knapp does not reply and the Captain leans over impatiently and shakes him by the shoulder.) I asked you if there was any answer yet?

KNAPP—(looking at him furtively) I haven’t heard a thing yet, sir.

CAPT. HARDWICK—Damnation! What in hell is the matter with them? Are they all asleep?

KNAPP—I’ll try again sir. (He taps on the key before him and the whine of the wireless shrills out discordantly.)

CAPT. HARDWICK—(turning away with a muttered oath) Well, I’ve got to get back on the bridge. Let me know the moment you catch anyone.

KNAPP—(who has been watching his lips move) Yes, sir. (His tone is vague as if he were guessing at the answer.)

CAPT. HARDWICK—Tell ‘em we hit a derelict and are sinking. Make it as strong as you can. We need help and we need it right away. KNAPP—(more vaguely than ever) Yes sir.

CAPT. HARDWICK—You surely ought to get the “Verdari.” She can’t be more than a hundred miles away if my reckoning is correct. (turning away again) I’ve got to go. Keep sending until you get an answer.

KNAPP—Yes sir.

CAPT. HARDWICK—(in under his breath) Damn your “yes sirs.” I believe you’re frightened out of your wits. (He walks quickly toward the bridge. Half-way across the deck he is met by Mason the First Officer, a tall, clean-shaven, middle-aged man in uniform who hurries in from forward.) Well, Mason, how do things look below?

MASON—Very bad sir. I’m afraid the bulkhead can’t hold out much longer. They’re doing all they can to strengthen it but it don’t look to me as if it would stand the pressure. I wouldn’t give it more than half an hour—an hour at most, sir.

CAPT. HARDWICK— She’s listing pretty badly. Guess you’re right, Mason. When that bulkhead goes it’s only a question of five or ten minutes. Are the crew all ready to man the boats?

MASON—Yes sir.

CAPT. HARDWICK—Good! Passengers all on deck and ready to leave?

MASON—Yes sir.

CAPT. HARDWICK—Good! Lucky there’s only a few of them or we’d be in a nice mess. Lucky it’s a calm night too. There’ll be no panic. (There is a pause broken only by the confused sound of voices from below.) Damned funny we get no reply to our calls for help, eh? Don’t you think so?

MASON—Very funny, sir. The “Verdari” ought to be right around here about this time. There ought to be four or five vessels we could reach, I should think.

CAPT. HARDWICK—Just what I told Knapp. The poor devil seems scared to death because he can’t get an answer. All he says every time I ask him is: (mimicking Knapp) Haven’t heard a thing yet, sir!

MASON—He’s told me the same thing three or four times. I don’t like the looks of it, sir. He appears to act queer to me.

CAPT. HARDWICK—You’re right. He has been strange all during the trip—didn’t seem to want to speak to anyone. I thought he must be sick. Think it’s drink?

MASON—No sir. I never saw him touch a drop—even on shore.

CAPT. HARDWICK—Let’s see what he’s got to say now. By God, we’ve got to get a message in soon or there’ll be the devil to pay. (They both go over to the wireless room where Knapp is frenziedly sending out call after call. The Captain goes into the compartment and stands beside Knapp. Mason remains outside the door. Knapp looks up and sees them. He glances fearfully from one to the other.)

CAPT. HARDWICK—Caught the “Verdari” yet?

KNAPP—(in the uncertain tone he had used before) I haven’t heard a thing yet, sir.

CAPT. HARDWICK—Are you sure there’s nothing wrong with this machine of yours?

KNAPP—(bewilderedly) No sir. Not a single answer, sir. I can’t account for it, sir.

CAPT. HARDWICK—(angrily) I know that. You’ve told me often enough. Answer my question! (Knapp looks at him with puzzled eyes; then turns to the key of his instrument. Capt. Hardwick grabs him by the shoulder.) Did you hear what I said? Dammit, answer my question.

KNAPP—(his lips trembling) No sir.

CAPT. HARDWICK—(furiously) What?

MASON—(interposing) Excuse me, sir, but something’s wrong with the man. I don’t think he heard what you said.

CAPT. HARDWICK—The coward is frightened silly—that’s what’s the matter. (Bending down he shouts against the receivers which Knapp has over both his ears.) Say something, can’t you? Are you deaf? (Knapp shrinks away from him, his face ashy with fear, but does not answer.)

MASON—Maybe it’s those things on his ears, sir.

CAPT. HARDWICK—(taking hold of the metal loops that go over Knapp’s head and jerking the receivers off his ears) Now! Answer me! What in hell’s the matter with you? (then his voice softening a bit) If you’re sick, why don’t you say so?

KNAPP—(looking at him helplessly for a moment—then hiding his face in his arms and weeping hysterically) Oh my God! it’s come!

(The Captain and Mason look at each other in amazement as Knapp blurts out between his sobs) I wasn’t sure. I was hoping against hope. I can’t hear a word you say. I can’t hear anything. It’s happened just as the doctor said it might. (looking up at the Captain and clasping and unclasping his hands piteously) Oh, I should have told you, sir, before we started— but we’re so poor and I couldn’t get another job. I was just going to make this one more trip. I wanted to give up the job this time but she wouldn’t let me. She said I wanted them to starve—and Charlie asked me for a suit. (His sobs stifle him.) Oh God, who would have dream’t this could have happened—at such a time. I thought it would be all right—just this trip. I’m not a bad man, Captain. And now I’m deaf—stone deaf. I can’t hear what you say. I’m deaf! Oh my God! My God! (He flings his arms on the instrument in front of him and hides his face on them, sobbing bitterly.)

CAPT. HARDWICK—(turning to Mason) Well, I’ll be damned! What do you make of this?

MASON—I guess what he says is true, sir. He’s gone deaf. That’s why we’ve had no answer to our calls.

CAPT. HARDWICK—(fuming helplessly) What in hell can we do? I must know they’re coming for us before I send the boats away. (He thinks a moment. Suddenly his face lights up and he strikes his fist into his open palm.) By God, I’ve got it. You know Dick Whitney? (Mason nods.) Operator of the “Duchess”—been laid up in Bahia with fever—came on board there—going home on vacation—he’s in the First Cabin—run and get him. (Mason runs down deck toward bridge.) Hurry, for God’s sake! (Mason is gone. Captain Hardwick turns to Knapp and lifting him by the arms helps him out of cabin and sits him down on the life-raft. Pats him roughly on back.) Brace up! Poor beggar! (Knapp continues to sob brokenly. Mason reappears followed by Dick Whitney, a thin, sallow-faced young fellow of about twenty-five, wearing a light sack suit. He shows the effect of his recent battle with tropical fever but he walks over to the wireless room confidently enough and takes his seat before the instrument.)

CAPT. HARDWICK—Get some one quick, Whitney. Tell ‘em we’re just about to launch the boats.

WHITNEY—(who has put the receivers over his ears) They’re calling us now, sir. (He sends answering call —a pause.) It’s the “Verdari.”

CAPT. HARDWICK—Good! I knew she ought to be near us.

WHITNEY—Operator says they’re coming full speed—ought to reach us before daylight—wants to know if we can’t keep up till then. CAPT. HARDWICK—No. Tell them the bulkhead’s almost gone. We’re due to sink within an hour at most. (to Mason) Better go down and see how things are below. (Mason leaves hurriedly.)

WHITNEY—All right, sir. (He taps on the key —the wail of the wireless sounds again —then a pause.)

CAPT. HARDWICK—What do they say now?

WHITNEY—(with a slight smile) “Hard luck.”

CAPT. HARDWICK—(exploding) Damn their sympathy!

WHITNEY—The operator says he’s been trying to communicate with us for a long time. He got our messages all right but we never seemed to get his.(The Capt. glances at Knapp who is still sitting on the life-raft with his face hidden in his hands.) He says he got a call from one of the Fruit Co.’s boats. She’s rushing to help us too. He wants to know if we’ve heard anything from her.

CAPT. HARDWICK—No. (He looks at Knapp again, then speaks dryly.) Tell him our receiving apparatus has been out of order.

WHITNEY— (looks up in surprise —then sends the message— there is a pause) He asks if we’re sure it was a derelict we struck—says the “Verdari” sighted one about where we are now yesterday and he sent out warnings to all vessels he could reach—says he tried to get us especially because he knew we passed this way; but if our receiving end was bad that explains it.

CAPT. HARDWICK—(staring at Knapp) By God!

WHITNEY—Anything more you want to say, sir?

CAPT. HARDWICK—(mechanically) Tell them to hurry, that’s all. (Suddenly in a burst of rage he strides toward Knapp and raises his fist as if to strike him. Mason comes in from astern and steps in between them. Capt. Hardwick glares at him for a moment—then recovers himself) You’re right, Mason. I won’t touch him; but that miserable, cowardly shrimp has lost my ship for me. (His face plainly shows how much this loss means to him. Mason does not understand what he means. Capt. Hardwick turns to the wireless room again where young Whitney is sitting expectantly awaiting orders.) Say Whitney! Write out that last message from the “Verdari” about her sending out warnings of that derelict yesterday—warnings which we didn’t get. Put down how the operator on the “Verdari” tried especially to warn us because he knew we would pass this way. (Mason now understands and turns from Knapp with a glance full of scorn. Whitney writes rapidly on the report pad near him and hands the sheet to the Capt. who walks over to Knapp and shaking him, holds the message out. Knapp takes it in a trembling hand.)

MASON—I’ve got all the men up from below, sir. The bulkhead’s ready to go any minute. Shall I get some of the boats away, sir?

CAPT. HARDWICK—Yes. (Mason starts astern.) Wait a moment. I’m coming with you. Come on Whitney. You can’t do any good there any longer. (He stops in front of Knapp as he walks toward the stern. Knapp is staring at the paper in his hand with wild eyes and pale, twitching features. Capt. Hardwick motions to him to follow them. They go off to right. Knapp sits still with the sheet of paper in his hand. The creaking of blocks is heard and Mason’s voice shouting orders.)

KNAPP—(in a hoarse whisper) God! It’s my fault then! It’s my fault! (He staggers weakly to his feet.) What if the ship is lost! (He looks astern where they are lowering the boats —his face is convulsed with horror—he gives a bitter cry of despair.) O-o-h! They’re lowering the boats! She is lost! She is lost! (He stumbles across the deck into the wireless room, pulls out a drawer, and takes out a revolver, which he presses against his temple.) She is lost! (There is a sharp report and Knapp falls forward on his face on the floor before his instrument. His body twitches for a moment, then is still. The operator Whitney comes running in from the right calling: “Knapp! They’re waiting for you.” He gives one horrified glance at the body in the room; says “Good God!” in a stupefied tone, and then, seized with sudden terror, rushes astern again.)

(Curtain)

title: Collaborative play writing/Warnings


text:
User:Jsnyder6518/Enes100/My Work 2

Write problem/project Goal
My goal is to create a hanger for a spaghetti bridge, and to create a spaghetti strand that will connect the arch and base.

My First Task
To come up with a way to make a spaghetti strand longer.

Summary of actual work over first weekend
The plan we came up with we aren't allowed to use so we have to come up with another way.

Week1 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Second Task
My second task was to come up with the options and specifications of our spaghetti strands.

Summary of actual work over second weekend
How is what you did different than what you planned?

Week2 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Third task
I'm going to draw the spoke part on a new software.

Summary of actual work over third weekend
How is what you did different than what you planned?

Week3 Narrative
Tell a detailed story describing what you did for your team over the weekend.

My Fourth task
''Record what you are planning on doing for the team during the final weekend of project work. ''

Summary of actual work over fourth weekend
How is what you did different than what you planned?

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Jsnyder6518/Enes100/My Work 2


text:
Engineering Projects/Bridges/Howard Community College/spring2012

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text:
User:Dgilliland/enes100/my work 2

Write problem/project Goal
to make the hangers of the spagetti bridge and figure out where to attach them.

My First Task
i will look at other types of hangers and then try and make a design for this project on the spaggetti hangers.

Summary of actual work over first weekend
what i did was exactly what i said i looked at hangers for bridges and then i started a 3d design but also made a scetch in my journal.

Week1 Narrative
during the week i made a scetch in my journal of the hanger i designed it had 4 pieces of spaghetti bound togthor attached to another set to make it longer. in 123d i made a cylinder by going undfer primitives clicking cylinder and then stretchin it out to form a cylinder and then i did this 8 times to make the equivelent of 8 pieces of spaghetti then i did the same thing and put a hole through most of it to make a rubberband and i did this 4 times.

My Second Task
i will test the spaghetti to make sure they do not have cracks in it,also i will finish asswmbling my design.

Summary of actual work over second weekend
this is what i said i would do because i tested a box and a half of spaghetti and then i did finish my design for my idea of the hanger but it will not be the final design.

Week2 Narrative
over the weekend i tested a box and a half of spaghetti by pulling them at the ends at the same time and tested each one individually. this is done to ensure that no weak peices are used in the bridge. As a result of doing this by hand i got the idea to have a machine do it by having something flat clamp down on the spaghetti and then pull at a certain amount of force until it equalled 30 pounds of force on the strand since that is what an individual peice of spaghetti can hold. then i finished my design by puuting all the pieces togethor so it was 4 sspaghtti pieces held togthor by a rubberband and there were two of these and they were attached at the end to increase the length.

My Third task
i plan to come up with a plan to make kits and instructions to get other people to make the hangers like we want them to.

Summary of actual work over third weekend
what i did was what i said i would using the final design i came up with a way to get people to mass produce the hangers so that we will not have to it will be using a picture and directions like building a model car. i also thought about how to improve the attachments but the way we came up with was the best so we will stick with that.

Week3 Narrative
over the weekend i made a 3d drawing of the final design to use as the instruction manual for people to see and assemble the spaghetti to match the picture like the instructions to making a model car. to do this i made 5 poles to represent spaghetti they were 10cm by 170cm. I attached one on to the end of another lengthwise to increase the length, and i did this twice, then the other piece was in the middle and i attched them so that they were the same length lon the sides and the middle piece was in the middle of the length.

My Fourth task
in the final week i plan to get people to buil the hangers and then if there is timne to attach them to the arc.

Summary of actual work over fourth weekend
what i planned was different because we were not ready to build alot of hangers so i continued to work on the kit, nothing was made by the people since it was not time and with nothing made there was nothing to put togethor.

Week4 Narrative
over the wekend i put the finalizing touches on the kit such as putting in spare peices and decided thet the peices can just be put togethor using superglue since it will be stronger. then i started working on the team page to get that done with the kit mostly done it is ready for the next group when they use it or they can just change the image that they want people to build.

Complete Team Page
Fill out the Team Form (should have already copied the form, created the team page, linked to it and started filling it out).

title: User:Dgilliland/enes100/my work 2