text:
User:Inh117/enes100/My work

Wind Turbine

Write problem/project Goal
To produce a model of a wind turbine contained by a shroud in order to demonstrate how turbines with shrouds produce more power than wind turbines with out shrouds.

My First Task
The first weekend, I conducted research on wind turbines and began looking at the concepts behind the WindTamer. this is a wind turbine design that encases the turbine blades that rotate to produce electricity. I also looked into the projections of wind energy and its place in the future as an alternative energy source. The WindTamer design is said to produce more electricity that a Horizontal axis or a vertical axis wind turbine.

Summary of actual work over first weekend
Thw WindTamer design must be fairly new as it is was not described in the books I read on wind energy. This confined my research to the internet. Also, since looking through many available motors, my original idea of using a printer motor wasn't going to work because it was brushless and would not be the best for power generation.

There has also been some debate on whether or not the shroud is best placed at the front or back of the turbine. I tried to look up the physics and mechanics of how the WindTamer design actually functions better than traditional wind turbines. I was able to find some answers in this video: Physics of WindTamer

Week1 Narrative
After some PC fans were obtained, it became clear that there were multiple designs needed to fully test the shrouded wind turbine design. The variations were a single shroud and a double shroud. The best placement for the second shroud still needs to be determined, I believe that it will function the best in the front.

Once the PC fans were in my possesion, I began to run tests on the four different wires that connected to the fan. the most obvious being the red wire and the black wire. Through spinning the fan by hand, I was able to generate about 0.32 volts of DC as indicated by the multimeter I was using.

Since the DC brushless motor that is contained in the PC fan was, in fact, producing power, the problems I initially ran into regarding brushless motors apparently not producing power were resolved. Although I would still like to explore the notion of a beter motor for power generation.

My Second Task
Since the PC fans are square, there is a large, flat end to the center iof the rotor blades. The fans must be made more aerodynamic to maximuze wind power and produce less waste. I am also looking around hardware stores for inspiration on mounting square fans securely enough to withstand the high winds generated when the turbines will be tested.

Summary of actual work over second weekend
Hardware collection was delegated to another group member and my next task is to come up with a feasible design centered around a 4 inch PC fan. After looking up a tutorial on the Loft function within SolidWorks 2010 found here: Simple Propeller Design, I was able to successfully model a PC fan as well as the back shroud of our wind turbine.

Week2 Narrative
My assigned task was to replicate a WindTamer-like design that focuses around a 4 inch PC fan. I designed the PC fan with relative ease since in my experience with CAD projects almost always involves modeling a fan of some sort. These different fans can vary dramatically so simply scaling a previously designed fan up or down does not work in all situations. I modeled the fan blades and the square case that held the fan in the center. Since this project involved shrouds, I modeled a similar PC fan case, but without the mounting struts for the motor, this compo9nent would be used as a front shroud extension.

The primary profile shape of the back shroud is a circle which conforms to the design of the PC fan case. But the case does not have additional space to mount wires to support the back shroud material. A simple plywood ring was modeled to accommodate both the 1/8 inch mounting holes on the PC fan case and 10 smaller holes to insert support wires into.

At around this point was were my experience with SolidWorks 2010 ran out. The megaphone-shaped back shroud had many design quirks about it that left me with many questions on how I was going to approach it. My original idea was to simply draw the side view of the shroud and simply revolve it around an axis. This approach was unsuitable because it did not allow for the modeling of the support wires. I then turned back to the Loft function, after sketching the profile each end of the shroud, I ran into more problems. When I tried to create the loft, instead of following the sketch I had made, it would fill in everything within the profile and then remove my profile sketch from it. I still have no idea how this could occur as I have never seen a Loft Extrude Cut function in any SolidWorks package I have used.

It is worth noting that this first shroud design was a more practical design, with the support wires modeled in the inside of the shroud. Since I absolutely could not get that design to model properly, I modeled a second design. The measurements were the same, but the support wires were on the outside of the shroud this time. I modeled a solid Loft of the two reversed profiles and then I used the Shell function to completely hollow out the inside. This design worked great on, because it modeled properly, and two, the wires on the outside make for a more interesting design.

With the components modeled, it was simply a mater of mating them together into the finished design.

My Third task
The next task will to begin actual construction of these turbines. The designed turbine shown here will take the longest time to build, so it should be flagged as a priority. the other turbines we will compare it to should be complete rather quickly.

Summary of actual work over third weekend
Implementation of the designs began this week. Being that the designs themselves are "soft" designs, they are not constrained to extremely specific measurements. This allows me to build the mounting ring with the confidence to allow for inevitable support problems that I can fix as they happen. In a perfect world, I would have had access to COSMOS 2012, a dynamic simulation software package distributed by SolidWorks. This would have allowed me to simulate different materials to different specifications. Although shroud material gathering is still ongoing, the terminal board was built for mounting the fans on and making it easier to take voltage and current readings off of it.

Week3 Narrative
Over the 3rd weekend, I began constructing the base board that the fans will be mounted on. Hex bolts were driven through the board, 2 per per fan. These will serve as electrical terminals that will make it easier to monitor the voltage and current running out of them. They are, in reality, unessential, but it will make the testing regimen easier when the time comes. Also, it is always advisable to build from the ground up as adding these terminals later would have been awkward and potentially damaging to the fans and shrouds.

This was our first time actually becoming familiar with the Engineering room and where certain things were located. It was truly an accomplishment that I was able to find eight matching nuts and bolts in the pile of miscellaneous nuts, bolts, screws, washers, etc. I was handed. Material gathering is still ongoing as there has been no consensus on what the shroud should be made of. The support structure is self explanatory, metal wire driven into a wooden mounting ring. However, there are ideas ranging from plastic wrap to cardboard to regular paper to make the shroud.

I believe that the plastic wrap will require less work to wrap the shroud. The only downside to this approach would be the necessity of further support on the back of the shroud to give it the support it needs to keep its shape. Cardboard would make this a non-issue as the stability of the cardboard compounds upon the support of the wires. The problem is that cutting the cardboard to preserve the curved (described and Lamp-Shade-like) shape of the shroud will be difficult and time consuming.

My Fourth task
This week, all of the materials have been gathered, and construction should not take long at all. Now I have familiarized myself with the engineering room, I am confident that mounting the fans and constructing the shroud will be simple.

Summary of actual work over fourth weekend
This week I rebuilt the entire system using different motors. The final assembly happened and the shrouded wind turbine was tested against a traditional turbine of the same diameter. After the assembly and testing were complete, I made the poster that summarizes our project.

Week4 Narrative
The construction of the shrouded wind turbine was completed. I built the testing board and mounted the shroud onto a small upright. since there was some extra wood, it was easy to reinforce the connection with a wood screw. A leaf blower and voltmeter were used to test the shrouded turbine against a traditional bladed turbine of the same diameter. The voltmeter was set to a 200 milliamp scale and we began recording data.

But I ran into a massive problem. The current the turbines were producing wasn't even enough to trip the sensors inside the voltmeter. The voltage refused to go above .5 volts. This was unacceptable, no usable data was being gathered. The project required a redesign using larger motors. This problem arose on the last day of building this project, and therefore I did not have time to study the new motor's operating parameters. The fan blades were separated from the motors attached to their cases. It was upon dissection that I found that there were extensive microchips inside the PC fan's motor. I guessed this to be a speed controller and encoding equipment, therefore severely limiting the amount of voltage and current that could leave the motor.

Two identical DC motors were found and placed in the rebuilt system. The traditional turbine simply needed the blades attached to the shaft of the new motor. The shrouded turbine, on the other hand, needed to be suspended in the center of a PC fan case. This required extremely accurate work to ensure the proper fit of the large diameter motor in the center mount of the PC fan case.

Once these modifications were made, testing resumed and the data I observed was amazing. The shrouded fan produced 1.2 amps and had a peak voltage of 25.6 volts. This far outperformed the traditional turbine, producing.90 amps and maxing only 21.1 volts. This project was a success in determining the validity of Shrouded wind turbines and their claims to produce more energy than traditional turbines.

I also produced the poster to be used as a visual presentation of the most relevant data to this project and I posted it to the main project page. But I also included a render here. I attempted to upload it to Google docs multiple times, but the formatting (the poster was made in power point) would continuously change at random making links to the "original" useless.

Complete Project Page
Wind Turbine

title: User:Inh117/enes100/My work


text:
User:Allenad/enes100/Mywork

Write problem/project Goal
We are working on the CoreControl project, picking up where others have failed. The core control machine that we make will be airtight and able to restrict or control the blood flow so that the rest of the machine can send a supply of cooled blood through the body.

My First Task
This week i will find supplies that can be used to make an airtight hold so that the blood pressure can be restricted to the hand cooling points.

I visited a few stores and bought some fabrics that may or may not work for this project. When i bought them i was looking for something that was airtight, could be altered (sewn into a certain shape or glued, or even somehow added to the blood pressure sleeve to make an airtight seal on the arm entrance of the mechanism), and relatively cheap material.

I bought a pack of balloons mainly for experimental purposes, but who knows might be able to use these in some shape or form for the final project design.

Also purchased a shower liner, 70 in W x 71 in H.

Last I purchased a poncho.

Summary of actual work over first weekend
Over the first week i visited a few stores to find some materials for the seal on the unit. I visited Lowe's and Wall Mart.

Both stores offered much, but i left out of WallMart with a few materials, a shower curtain, some balloons, and a poncho. I chose these items because they were easily altered and could be made to fit our specifications for the seal.

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

My Second Task
My job over this weekend is to alter the materials that i found to make a seal for the unit. Im in contact with my team mates by cell phone and i am open to any suggestions. In order to do this i will have to make measurements of what the seal will be attached to and then construct the seal accordingly.

Summary of actual work over second weekend
Did not do any experimentation over the weekend because we found a design that we will run with.

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

My Third task
Once we get the materials i will construct the CoreControl following the tutorial and, document any struggles along the way.

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. Also, over this weekend i will be putting together a method to test the effectiveness of the completed corecontrol device, i will document my regular gym or a workout routine that i will be able to try again with the corecontrol device. The test will include a variety of exercises, including upperbody exercises such as arm curls or bench press, and exercises that should test whether the device has a an effect over the whole body's recovery. To do this i will include a lower body exercise such as leg presses or squats. If the corecontrol can improve exercises for the lower body (measured in more reps or more weight), then it truly will be effective and possibly can further be improved on through more testing and trial and error.

Summary of actual work over fourth weekend
This week i started started assembly on the CoreControl, and ran across many problems. First I cut the piece of pvc pipe and realized that it was not thick enough to construct the unit properly. After several trips to Lowes, Home Depot, and Walmart we were able to get the necessary materials that we did not have yet. This included pvc cement and sealant to make the unit airtight.

Next over the weekend i constructed a test module for the corecontrol. The tests will consist of dips, bench press at a set weight of 185lbs (for me), and sprints on a treadmill on an incline. All of these exercises will be performed till failure. The corecontrol will be used 2-3 days minimum after i test for a baseline. I havnt yet figured out how to control a placebo effect. I will present to the class on thursday to find out exactly how to control or make sure that placebo does not take too much control of the results of the corecontrol tests versus my baseline results.

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

Complete Project Page
CoreControl

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

title: User:Allenad/enes100/Mywork


text:
User:Shatton8111/enes100/my work

Helicopter Project

Write problem/project Goal
To create an Arduino-based quadcopter that flies itself without a remote control.

My First Task
I'm creating an interface for the Arduino to control the ESC motor.

Summary of actual work over first weekend
I researched gimbal designs and functions, compared Bluetooth and ZigBee communication for the Arduino, recorded discoveries about the ESCs and motors, and coordinated team efforts.

Week1 Narrative
I created a GitHub repository for my code: EngineeringClass2012. I found this code for controlling the simpler ESC from an earlier project. I found out that the "simpler" ESC is actually a Yagi 5 Amp ESC. I sent an e-mail asking for more of this kind of ESC, so that the Arduino can use multiple to control multiple motors. It is very likely that the helicopter won't be using the more complex ESC's, unless the 5 Amps aren't enough current.

During the team's in-class presentation of progress, it was discussed that the motor's secondary pair of wires (green and yellow) could be used to measure its RPM. I don't know what advantages this could have, but it's worth looking into. At the very least, it could be used for sanity checking and calibration for the various motors.

I e-mailed the team to coordinate focuses for week(end) 1.

I think I prefer ZigBee (an XBee modem) over Bluetooth (BlueSMiRF). ZigBee seems to be limited to several hundred kbps while Bluetooth can go up to about 1 mbps, but ZigBee costs much less (~$20 - 30, compared ~$20 - 60), has different versions that allow much greater distances (e.g. 15 miles), and has documentation that's immensely more usable. However, there is a Bluetooth example that covers both computer-side graphical interfaces and Arduino-side communication. I haven't seen anything like that for ZigBee yet, but I doubt it would be difficult to make (since the XBee can act as a serial port for the Arduino and computer).

For gimbal design, I found a previous team's set of links that includes helpful-looking gyro and accelerometer tutorials. The links show circuits and code that might only need to be understood and connected. I can ask in class if there are any similar parts available.

During the Engineering Club, I tested the ADXL335 accelerometer with the Arduino Uno. By following the blog/tutorial in Sensing Orientation With The ADXL335 + Arduino, I was able to see what the accelerometer did when I vibrated it vertically and horizontally (X, Y, and Z). This was shown by three numeric values coming through the serial channel to the serial monitor in the Arduino IDE. After that, I graphed the values using a modified version (to show three axes instead of one) of a graphing example written in Processing.

Apparently, at a certain point each sensor reaches an overflow point for its readings. At this point, the reading wraps from the highest to the lowest possible value. I think an initial level calibration technique will be necessary in software, unless a gimbal or something else would solve this problem.

My Second Task

 * I plan to research gimbal and accelerometer mechanisms, design, construction, and use in online resources and past projects. I hope to have a functioning device that is interfaced with and monitored through the Arduino by next class.
 * I also will begin researching ZigBee and Bluetooth. I hope to have a cost/benefit comparison and a set of parts ready for recommendation by next class (or Engineering Club meeting).

Summary of actual work over second weekend
I decided on Bluetooth communication parts, coordinated with my team by e-mail, and worked more on understanding the Thunderbird 9 ESC.

Week2 Narrative
By talking to the rest of the team while in class and by e-mail, I decided that Bluetooth would be a better fit for the scope of project. Bluetooth seems to be more expensive than ZigBee per part, but it requires fewer parts, is simpler to implement in electronics and software, and is slightly cheaper overall. I sent the professor an e-mail, requesting the following Bluetooth parts:

At the Engineering Club, I worked with Jromanch0088 to understand the Thunderbird 9 ESC (PDF of manual). After wiring the ESC according the documentation of Wfalak, I tested it by first using Wind tunnel servo code (the "esc" section) by Rhorton4549 and powering the ESC and motor via a reused AC power adapter. The result was no response from the ESC, except for the start-up sound when powered and a relatively warm temperature, which could be a sign of mis-wiring or a possibly damaging electrical current.

As a sanity check, I retested by using my earlier, unfinished Thunderbird 9 ESC code. The result was the same, leaving the possibility for conclusions such as the AC power adapter being mis-wired or drawing too high a current, the ESC already being damaged (which is unlikely, since it made a start-up sound), or the wiring being inadequate for the ESC to function properly.

My Third task
I plan to learn how to control multiple motors using the Arduino motor shield. Then I'll attempt to balance motor thrusts on the seesaw, using the Arduino and gyros/accelerometers. If that goes well, then I can move on to making a prototype frame hover. After that, I should see if I can direct its flight in a controlled way.

Summary of actual work over third weekend
I wrote programs for the Thunderbird 9 ESC and tried making a prototype wire harness for the ESC's and motors.

Week3 Narrative
Once manually controlling the Thunderbird ESC was understood (it needed a higher current) in class, I worked with Jromanch0088 to control a motor with it via the Arduino Uno. After testing it successfully with the Servo Sweep example program, I tried it set it to start at specified speeds. That didn't work, leading me to conclude (through much trial and error) that the Thunderbird 9 ESC, like the Yagi 5 ESC, had to be gradually stepped or ramped from one speed to another.

Using this strategy, I later wrote a program to test the attached motor by quickly ramping-up speeds from 0 to 5,000 (units unknown; related to servo.write(speed);). From testing, the ESC and motor appear to increase speed from ~40 - 170, is constant until 500, becomes stationary until 1,000, and then is at a constant high speed from 1,000 to the tested 5,000. It was suggested that because we were giving the motor only a few Amps (I read ~0.7 on the 200 mA setting of the voltimeter), if we increased its current to closer to its maximum rating we might see faster speeds from the motor.

After class, I wired the Arduino Uno into a circuit that would simply relay its ground, 5 volt power, and digital pin 9 signals to two Thunderbird 9 ESC's. The result was that I was able to control two ESC's simultaneously.

At home, I connected the tried connecting the Thunderbird 9 ESC and Hacker A10-13L motor together. I found out that the caps of the motor's connectors and some of the ends of the ESC's wires were too big to fit into the narrow metal conductor inside the butt connector. I tried using clear tape to connect the wires from the two parts. It was very loose and the wires didn't stay together very well.

My Fourth task
I'm planning on focusing on building pairs of Thunderbird 9 ESC's and Hacker A10-13L motors. When this is done, I'll move on to using gyroscopic sensors on the balance beam/seesaw to simulate the balancing of the motors' propeller thrusts. This will be first be done without propellers attached, since high-speed blades are a safety hazard.

Summary of actual work over fourth weekend
I built two pairs of ESCs and motors, but, due to confusion with other teams' hand-made power supplies, I was unable to prove their reliability. This prevented me from progressing on to gyroscopic sensor testing.

Week4 Narrative
I tested having a single Arduino Uno control two Thunderbird 9 ESC's and their attached hacker A10-13L brushless motors. With my dual ESC test, I had one ESC spin increase its motor's speed while another decreased its motor's speed. There were quirks with one motor always starting late, presumably because I didn't properly ramp its speed setting (I just set it instead). The main problem I ran into was that sometimes the hand-made power supplies I was using would suddenly shut-off. Finally, I used one with an AC outlet instead of the classroom's desk power system. This seemed to help, but the source of the problem isn't obvious.

Video of it working:

 * Test of Arduino Uno Controlling Two Thunderbird 9 ESC's.

Later, I made another ESC/motor pair. This time I made two mistakes. First, I had crimped too close to the center of the butt connector and missed the ESC's wire. This let it slide out of the connector. Then, I tried again closer to the wire. I found out after this that the motor's connector didn't have enough room to fit inside the connector's inner conductive sleeve. So, I cut the ESC's wire at the end of the connector, stripped 2 - 4 millimeters, inserted the motor's connector into the conductive sleeve first, inserted the ESC's wire, and then crimped just the ESC's wire. This allowed the ESC's wires to be permanently attached to the connectors and let the motor's self-adjusting connectors to also be used. This way, the motor could still be reused.

At the request of a Wind Tunnel team member, I also figured out how to control a much larger motor using a HexTronic ESC. It was pretty cool. I just used my existing Thunderbird 9 ESC burn-out test for it. Apparently, like the new Thunderbird 9 ESC's, it needed to have its 5 volt ESC wire disconnected. I'm still confused by this.

title: User:Shatton8111/enes100/my work


text:
User:Touelia/enes100/Weekly Report

Link to team page.

Write problem/project Goal
The project goal is to build a CoreControl system to increase the strength and endurance of the user. The original plan to use use a vacuum cleaner will not work and I will need to find an alternative replacement.

My First Task

 * I will learn to how use Autodesk 123D software.
 * I will create a 3D model of the CoreControl using 123D.

Summary of actual work over first weekend
This week I used Autodesk 123D to draw a digital model of the CoreControl. I spent several hours watching 123D videos on YouTube.

Week1 Narrative
This week I downloaded Autodesk 123D to draw a model of the the CoreControl. After several hours of 123D tutorials on Youtube and began drawing the CoreControl. I ran into several issues while drawing to the CoreControl; my laptop kept freezing up because I had too many objects loaded on 123D, 123D did not have all the shapes I needed, and I had trouble combining the separate parts together. I watched several more videos on Youtube and learned to create 2D shapes and convert them to 3D forms, which also reduced the amount of objects needed to complete the drawing. Lastly, combinign the shapes were actually quite easy, I just needed to find the combine shape function. After I finished the drawing, I loaded them onto our group project page.

My Second Task
I plan on searching online and several local hardware shop for a vacuum pump.

Summary of actual work over second weekend
I planned on using a vacuum for the CoreControl, but the continuous suction from the vacuum will not work. I will need to find an vacuum pump to replace the original vacuum. I drove to several hardware stores and asked several attendants at the plumbing and outdoor section about pumps. They showed me several pumps, but none matched what I needed. After searching the hardware stores I found a site online and read a Do it Yourself Tutorial of CoreControl: http://www.instructables.com/id/CoreControl-DIY/

Week2 Narrative
This week I went to several hardware and auto parts stores to make a list of possible vacuum pumps the team can use for the CoreControl. The auto parts store had several brake bleeder pumps that may work, but they are not automated, which will require the user of the CoreControl to manually control it. I found several vacuum pumps at the hardware store; a siphon pump, a water pump, and several plumbing pumps. The plumbing pumps were rather expensive, so I decided not to use considered them. I did not find any vacuum pumps that were automated at the places I looked, but I will continue to search more sources over the week.

My Third task
Next week I will need to find a starting point for solving our vacuum pump and water pump issue.

Summary of actual work over third weekend
I tested out a couple water pumps I found around the engineering room and found one that may possibly work. After attaching gator cables to the pump and attaching them to the 12v power box, the pump did not work. After submerging the top half underwater it began to pump, but it will not work for the corecontrol because we need to have a pump that can be submerged inside a container filled with water. I checked homedepot.com and found a small water pump that will work. After finding the water pump, I found a couple alternatives for the vacuum pump at Indestrubles, but this pump stood out because it only requires a cheap air compressor and I could attach a gauge to it.

Week3 Narrative
This weekend I tested out several water pumps to use on the CoreControl. Some of the pumps I tested did not work, except for one. The working pump only worked if you have water overhead pressure, which will not work for the CoreControl. After testing the water pumps, I went online and found several pumps that could work, but I chose a small pond water pump that could be found at Home Depot. I also looked online and found a couple vacuum pump DiY that we could work on after we have built a prototype of the CoreControl.

My Fourth task
For the final week, I plan on building a complete CoreControl prototype to be tested.

Summary of actual work over fourth weekend
This week I constructed the corecontrol with the materials we requested, but I had to replace the PVC pipe because the thickness of the pipe was too small and we needed another type of glove to create the vacuum seal. The thicker pvc pipe will allow for the brass pipe coupling to tighten around the pvc to hold it in place. For future construction the pvc pipe may will need to be an inch or so wider for a better fit.

Week4 Narrative
This week I started construction of the corecontrol. I began by cutting a 8" long peice of pvc pipe and marked the pipe at the 4" on opposite sides and a 2" mark on the perpendicular to the 4" markings. I then drilled holes into the PVC pipe and the 4" and 2" mark and installed a 5" brass pipe with nipples through the 4" holes. Once the piping was installed I sealed the pipes with water sealant and left the sealant to dry for 24 hours. After allowing the sealant to dry for 24 hours, I installed couplings to each end of the brass pipe, making sure to apply teflon tape to the threads before attaching and being careful not to tighten the couplings to hard or else it'll twist the pipe and break the sealant. The couplings were then attached to vynll tubing which will circulate water through the brass pipe. I then attached the vynll tubing a water pump to test if it worked and to check for any possible leaks in the pipes. The pumped worked and the pipes had no leaks so I dettached the vynll tubes and the water pump to create space to install the pvc pipe reducer. At the opposite end of the pvc pipe, I installed the pvc pipe reducer by applying pvc primer first, then waited a few seconds before applying pvc cement on both the pvc pipe and inside the pvc pipe reducer. Once both pipes were coated with the cement, I attached the two parts together. I wait an hour for the pipes to stick and applied silicon sealant to the edge where the pvc pipe and pvc piper reducer connected. After the sealant was applied I left the corecontrol to dry for 24 hours. I am now in the process of looking for possible solutions for a vacuum seal.

Complete Project Page
Follow the "project done" format.

title: User:Touelia/enes100/Weekly Report


text:
User:Sali6089/Wind Turbine

Wind Turbine

Write problem/project Goal
We want to produce a windturbine that is shrouded and we want to see whether that surrounded wind turbine produces more power than normal unsurrounded wind turbines.

My First Task
Brain storm and think about possible ways of making a shrouded windturbine. Also, by watching various Youtube videos on how to make a simple wind turbine.

Summary of actual work over first weekend
For the shrouded windturbine project. I originally planned to use a small fan, like a toy fan and shroud it using a megaphone. Obviously I would disassemble the speaking part of the megaphone and use that small area for the fan. Then I would connect it to a generator, which would have an Arduino in it for power and I would move the propellers of fan using a hair dryer. The hair dryer would act like a wind blower. I thought about generating power of at least 5 volts. My idea was sort of primitive though.

Week1 Narrative
The very first day when I got the project me and my team mates started brain storming. I came up with the idea of using a small toy fan and connecting it to a small generator. But my idea was very primitive and wasn't certain that my idea would work. So then one of my team mates, came up with the idea of using PC fans. The PC fan idea was very cost effective, because we didn't know that we had a bunch processors lying around the tool's area and also megaphones are expensive. If you go to Wal-mart, a megaphone costs around $50-60 and there was no guarantee whether the project would work, so those $60 would just blow off in the air i.e. if the project didn't work. So, then me and one of my team mates went to the engineering tools room, we got out several processors and started dissembling them. My team mate was an expert in disassembling processors, he taught me on how to dissemble them. Finally I got out 3 fans, one of them was shrouded and the other was double shrouded.I believed that the more shrouded the pc fan the greater the power. For the 3rd fan I had to remove the shrouded part of it.The reason I wanted to remove the shrouds was because I wanted to test how much power it produces. So, in order to remove the shrouds, I asked my client whether he had a tool to cut the shrouds off. He did have a tool to cut the shrouds off, it is called a multipurpose tool. A very dangerous tool but very effective. After that I started to check the voltage of each fan using the power supply. The single shrouded fan started moving at a voltage of 5 volts.For the other 2 I didn't have time to test the voltages.

My Second Task
My second task is to test how much voltage the other 2 fans produce. Me and my teammates also want to find a generator that can hook up the fans.So once the fans start moving, it can convert kinetic energy to electrical energy.

Summary of actual work over second weekend
The work which I did was completely different than I actually planned. I wanted to test the 2 voltages of the other 2 fans, but one of my team mates already tested the voltages. He found out that the voltages of the other 2 fans is almost the same as the voltage of the first fan which is 5 volts. I also wanted to find a generator that could hook up the PC fans and basically convert wind energy to electrical energy, but again one of my team mates came up with the idea that PC fans already have a generator in them, they have it at the back of them. A simple idea which anyone could have come up with. The only thing which was the same this time was the idea of using ping pong ball on the PC fan for more aerodynamics.

Week2 Narrative
This weekend we basically worked on the design stage of the wind turbine project.We know how much voltage it produces, now its time for the design stage. My team mate found an excellent video on shrouded wind turbines here is a link, but this video is already on my team mate's page, here is the link to it Physics of WindTamer But again this is NOT MY WORK, its one of my team mates work.This video made us think that the front part of the shrouded wind turbine is important to. I also tried to find a video over this weekend on how to make a small shrouded wind turbine for an engineering class, but unfortunately I wasn't able to come up with any of the videos. I also went to the engineering projects site to find something from the old group that worked on the wind turbine project before but again I wasn't able to find anything that could be useful to us. For the design stage we decided to use PVC pole that could help us in mounting the PC fan w/out the shrouds. For the other 2 my team mate came up with the idea of using a piece of wood that could help hold the PC fan. I thought about using a small aluminium rod that could support the PC fan but my team said that wouldn't work. For the double shrouded fan, my team mate came up with the idea of using the part the in which the single shrouded fan was being taken out, that part would be stuck to the back of the PC fan. I originally planned to not to remove the box in which the PC fan was in and use that as a double shrouded fan. For the front part of PC fan my original idea of the megaphone is still part of the project. I just have find a megaphone that is very cheap. Even though my team is thinking about other ways of producing that front part w/out buying anything.

My Third task
On my third weekend I m planning to go to home depot to buy a perferrated mounting strip that can hold the PC fan on top of the wood, also I' ll try to search a cheap megaphone.I thought about of using a gorilla glue that could hold the PC fan to the piece of wood but my team mate said that wouldn't hold the PC fan and will cause the work to be really messy.

Summary of actual work over third weekend
This weekend was pretty much done according to plan. I was given a task to go to Home Depot to buy a plastic hanger mounting strip, that could hold the PC fan on top of the piece of wood.We also wanted to work on the design stage of the project and we did. But our plan was to finish off the project over the third week, but unfortunately we weren't able to. Hopefully by next week we would be done with our shrouded wind turbine project.

Week3 Narrative
Well as I mentioned earlier. This week I was assigned to go to Home Depot and buy a plastic hanger mounting strip. Before that I had to search for the plastic mounting strip, it took me hrs to find on the Home Depot website. My team mate told me that it is actually a perferrated mounting strip, I typed that on the Home Depot website and that wasn't it. So, it took almost 4 hrs to find the strip and I finally found it because I used the word "hanger" by accident on Home Depot website.Since I don't have a car, I had to ask one of my friends to take me there. I went there and finally found the mounting strip which was almost $2. While I was at Home Depot I found a lamp cover that exactly looked like the front shroud of a shrouded windturbine. I asked the sales person to buy the cover of the lamp, but he said that the cover is included in the lamp. The cost of the lamp was almost $63, one of the most expensive lamps I've seen so far. I then decided to take a photo of it,so that I could document it and my client buys it from the Home Depot. But unfortunately, the camera in my phone didn't work and I was also running late for an appointment so I wasn't able to take the photo of the lamp.

I was trying to upload a photo of the drilling machine but I wasn't able to due to copyright issues. That battery operated drilling machine is an excellent tool. Its safe, light weight, and easy to operate compared to traditional drilling machines.

My Fourth task
This weekend I am given the task of buying metal hangers. Once I buy that then we just have finish off designing the shrouded wind turbine and hopefully by next week we will be done with our project.

Summary of actual work over fourth weekend
This week was also done according to plan. I was given the task of buying metal hangers, and I did. The good thing was I didn't have to buy metal hangers. I asked one of my friends for it and luckily he had it. But unfortunately we didn't use them at all since our client bought a lamp shed for us. So we didn't use metal hangers at all.The rest of the weekend I just kept working on the design stage of the shrouded wind turbine project.

Week4 Narrative
When I started off working on the design stage, 20% of the design stage was already done. My team mate already made a board, the only thing we had to do was to put a piece of wood on top of the board that could hold the PC fan. I already drilled holes onto the piece of wood last week. So I just had to mount the screws onto the piece of wood. But before that, as I mentioned earlier, my client bought a lamp shed. So we had to mount the lamp shed onto a circular piece of wood so it could stick the lamp shed onto the circular piece of wood. In order to make a circular piece of wood,I took a piece of wood, my team mate made a huge circle around it using a marker and a compass.I then used a Mikita jig saw to cut it into a circular piece. While I was cutting it into a circular piece, the blade fell off of the jig saw. It took us almost an hour to figure out how the blade goes it into the Mikita so we used a manual, here is a link to the manual Manual for Jig Saw. I found the link and my team mate helped me in making the jig saw work again. Once we got that out of our way, I finally cut out the circular piece of wood and stuck it to the lamp shed. After that we connected it to the PC fan using hot glue. The hot glue really sticks a material. I just can't upload a photo of it due copyright issues. We then took another piece of wood, stuck the shrouded PC fan on top of it, as I mentioned earlier. I already had put holes into it, so I just had to put the screws in it and I did. For the non shrouded PC fan, I used a PVC pole. My team mate drilled holes into it and stuck the non shrouded PC fan on it using a plastic strip (I don't really know what they call it). After that we just needed wires so that we could hook it up to the voltmeter and measure the current and V. But unfortunately our fans were not generating enough power. We did this process for almost 45 min.We gave up after 45 min. We asked our client that our project was not working and he got pissed. So we started brain storming and trying to identify what was wrong. I came up with the idea that since the lamp shed is not spinning, it does not produce any power. My team mate said that wasn't it. After about 5 min, I realised that since the PC fan generator is not big enough, I needed a bigger generator in order to produce more I and V So we had to dissemble the PC fans again. I removed the rubber magnet in one of them. It almost took us 2 hrs and 30 min. to disassemble and reassemble all the parts together. I don't even remember what I did while I was going through that process. After that we finally tested out the voltages. It turns that double shrouded produced more power compared to the non shrouded PC fan. After that we were basically done with our project. It literally took us almost 12 to 14 hrs finish off this project. I worked 2-3 per week for this project.

Complete Project Page
We are done with our project. I worked 2-3 hrs per week. Our project is working fine hopefully it will work w/out any errors.

title: User:Sali6089/Wind Turbine


text:
User:Deakin2074/enes100/mywork

Link to team page.

Week0 Activities
the goal of this project is to produce a wind turbine to test the capabilities of power generation

My First Task
for the first weekend I did mostly brainstorming, but have a simple design of what i am to create.

Summary of actual work over first weekend
over the first weekend i created designs on how the project will look. these were some rough sketches, and so i have no idea of what to expect from the first design.

Week1 Narrative
For week one of the project i went home and continued on the wind turbine design. the design would include modifications to the current by improving the aerodynamics of the fan and the wind around it. the fans that i am currently using are in a square sheeth with a flat body. the design that i worked on will draw more air through the fan, it will do so with the new aerodynamic modifications i added. the design was simple, i just added a cone design to the front of the fan to improve the current flat faced fan. with the cone in place the air will be drawn into the fan and around the new cone on fan.

My Second Task
the second task that i need to do is to put the design together and to make sure that it will have the output i am looking for. also i need to make the fan contunuly more aerodynamic to increase the ;possible energy output. the more i can better the design the more the power that can be be produced from the design. i was thinking that weight reduction along with constant aerodynamic testing will draw optimum power

Week2 Activities
Feb28==

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
over the third weekend i continued my progress on the wind turbine. for the progress of the turbine to continue i gathered various materials such as glue, hot glue gun, nails, and anything else i may need to use to hold the turbine together.

Week3 Narrative
over the weekend i started to put the turbine together. the first thing that i started progress on was the design with the shroud because it will be the most difficult to create. the shroud design would need to be mounted onto the wind turbine housing itself. to make it easier on myself i decided that it would be easiest to put together just by using nuts ang bolts. the first problem i ran into was that the holes that origonally mounted the pc fans to the pc were too small for the materials i aquired. to avoid going back to the store i simly re-drilled the holes making them only slightly larger but making it so there was not a lot of wiggle room. drilling the holes in the PC fan shroud could leave room for the bolts to move but by using a drill bit that is closest to the same diameter as the bolt i reduced the extra room that the bolt could move. by removing this space i can reduce vibrations within the structure itself.

i have noticed that their are many small factors that can effect the wind turbine. something that i had noticed with the other wind turbine group was some of the problems they were having. small factors in their design were causing problems. height was one of the biggest problems and their turbine did not seem to be properly mounted or secured to structure because there were vibrations that caused the head of the fan to shake in a horoizontal direction. also balancing this fan could also be an issue that needs to be delt with in the correct manner so the fan again does not cause any extra movement. the issue with the extra movement is that this means the extra movement will be a loss of energy. these wind turbines are used to capture energy and to acheve the optimum power from these PC fans they must not waste any extra energy on extra movement.

My Fourth task
for the final weekend for this project the shroud will be finally be put on the one fan design. also the other designs will be constructed to show compairisons betwwen the pc fans with or without the shrouds.

Summary of actual work over fourth weekend
over the last weekend i had planned on just recording the results of the turbines, but there were several errors in the design that needed to be significantly modified to get the results i am looking for. over the weekend the windturbines were all mounted but the DC brushless motors needed to be taken off and replaced with new motors. then like before the fan was ziptied and glued to its standing support. with the motors sucsessfuly changed out i took it outside and began recording the final results of the turbines. i created two videos that show the results of the turbines which can be compaired with the obvious understanding that the shroud design proved to create more power than its competition.

the final results were that the shrouded turbine design was a lot better than the free floating fan turbine.

Week4 Narrative
over the weekend i created several videos demonstrating the project comming together. the wind turbine project was coming to a close so i documented, and recorded all the vital information that would bring the project to its conclusion. data collection is the most important part of the project because this information will prove or disprove the wind shroud design being the best choise. when both of the turbines were set up the testing process could finally begin,but there were several issues with the motors. the dc brushless motors were not generating as much amps as i had origonally presumed. after getting annoyed with the motors not complying with what i want them to do they were ripped off and never seen again. after the new motors were iinstalled to the fan blades i continued testing with positive resultus. the new motors were working great, so great the other wind turbine group was totally jealous. with this awesome video you can see me attempt to hold the camera still and obviously fail. more importantly this video shows the un-shrouded fan or 'control' of this experiment. with this | Awesomer video I was able to compare the results by both turbines. on the unshrouded turbine it maxed out at .8miliamps, while the shroud design produced almoset 1.2milliamps. the shroud design produced 100% more power when compaired to the un-shrouded design which is very significant.

the wind shroud design that was replicated from the original Wind Tammer has proven very sucsessfull with solid results. the shroud design produced a significant more than the un-shrouded design. the reason the shroud design was so sucsessful was due to the airflow around and through the turbine. the natural wind creates a vaccume around the turbine, which can there by draw more gas through it. to make sure that this was the actual case and not random more testing of the shroud design needed to be done. a simple plan was devised to use the whole leave blower and focus the air directly at the fan. by directly shooting the fan the air cannot travel around the shroud and create the vaccum. when the air was focused towards the center of the fan the amps were very minimal when compaired to the origonal shrouded results. this thereby proves that the shroud is creating this vaccum and provides more power than a shroudless design.

Complete Project Page
Wind Turbine

title: User:Deakin2074/enes100/mywork


title: File:VHDL.Signal.1.A.20120217.pdf


text:
Talk:BCP/Streptopus lanceolatus

ID
File:Polygonatum biflorum 01.jpg is a (misidentified) image of Streptopus lanceolatus. --Robert Flogaus-Faust 15:35, 17 February 2012 (UTC)

title: Talk:BCP/Streptopus lanceolatus


text:
User:Stevecole888

This is stevecole888's main page he goes to howard comunity college and is in the intro to engineering class

/enes100/

title: User:Stevecole888


text:
Engineering Projects/Car Hack/Howard Community College/Spring2012/p1501kmd

Problem Statement
To rise/better the miles per gallon with a vehicle

Team Members

 * Kimberly
 * Martin
 * David

Summary
For this project, our team started the process of hacking a vehicle (2002 Toyota Corolla) in order to better the miles per gallon. First, we started the project on another problem, trying to make a stock vehicle into a race car by improving the rpms with the vehicle. We did some research and found the easiest way to go about this is to hack the ecu with the vehicle, that controls all the electronic components, and modify it so that the maximum output of rpms given by the car became it’s initial. We went to Crazy Ray's Junkyard and took a ecu from the same model car to run tests on while keeping the car’s initial ecu still intact in case of failure. We then researched how to go about reading the stock ecu from the vehicle and learned about OBD devices. The group before us had brought a wifi one, but it did not work properly do to the year one the vehicle. Being a 2002 model car the ODB reader located under the steering wheel could only be read by OBD II scanners, and we only had a OBD I wifi scanner. So we purchased an OBD II scanner from amazon Buy OBDII that came with its own software and connected from the OBD port in the vehicle to the laptop directly instead of wirelessly to avoid the whole wifi communication lost problem. After installing the software to the laptop, we encountered another problem being that the software was only compatible with windows software and we all had macintosh. So we had to download an application called Parallels, that allows you to run windows and macintosh on the laptop at the same time. After install parallels, we reinstalled the software for the OBD II device under the windows window, connected the OBD to the vehicle and laptop, and began reading the MPG, RPMS, Engine temp., etc. from the ECU with the vehicle. We then again, did more research to learn how to read and what codes the ECU gave off and how to go about changing those codes. What we found was that the ECU acts just like any computer system and the hardware codes, made by the manufacturer differs between vehicles and is given all in dual numbers and letter pairings. For example, Arduino Codes. We also found that the arduino is the easiest way to go about translating these pairing codes into html format making changing the changing of codes simpler using the can-bus shell. We are currently learning what html codes the ECU will read from the arduino and how to write our own programs within the arduino to control the readings from the ECU to the engine bettering the MPG within the vehicle by controlling the fuel injection valve when you step on the acceleration pedal.

Story
Week 1-This week was much more of brainstorming than actual work. With being in the car hack project, the scale of a car and the vast directions in which we could’ve taken this project needed to be scaled down so that we could find a starting point.

Week 2- We started to develop a plan of what to do. Our first goal was to research how to read everything off of the vehicle. Get to know the vehicle functions, it’s capabilities, etc. Our second goal was to decide on the model of the car on which we were going to experiment on and to start researching on the manufacturer of the vehicle and how this car is different from others.

Week 3- After collecting efficient data on our vehicle and learning what to use to read what we wanted from the vehicle, this week consisted of gaining those materials, installing software, and researching projects others had conducted before us to give us more of a push forward once the supplies had arrived.

Week 4- The last week of this project, with everything installed and on hand, we started writing our own programs within the arduino using the research we did from people before us in order to control the fuel injection valve within the engine to better the MPG from the vehicle.

Individual Work

 * David's Story and work completed
 * Kim's Story and work completed
 * Martin's Story and work completed

Decision List
The only decision we had to make during this project was which vehicle we were going to use to experiment own and which OBD to choose in buying a new one. Both were fairly simple with David volunteering his vehicle and with the wifi connection giving us problem with the original OBD I scanner, we eliminated that problem with the direct connection from the OBD port in the vehicle to the laptop.

Material List
Arduino, 1, $12

Monkey Wrench, 2, $7 each

OBD II Scanner, 1, $11

Can-Bus Shell for Arduino, 1, $20

Philip’s Head Screwdriver, 2, $7 each

Power Drill, 1, $79.95

Power Drill Bits, 2, $7 each

Hack Saw, 1, $24.95

Software List
We used a software package called [Scantool] to aid us in reading the ECU using the OBD scanner.

We also used the software package called [Parallels]

Time
In total, all of us spent a collective: 25.5 hours

Tutorials
Connecting OBD II to OBD car port and laptop: Reading OBD

Next Steps
The successors must continuing using arduino to write own programs into ECU or find alternative means of going about hacking ECU codes. Once full programs are written or codes are changed, next team must run modified ECU thru vehicle and read off results. This whole project is trial and error, so suggest to write little code then try instead of huge program then trying resulting in lose of vehicle all together.


text:
Engineering Projects/Model boat/Howard Community College/Spring2012/p1501-ZlM

Problem Statement
Make a model boat with an autopilot and camera that can chase turtles or shoot BB's at other boats in a competition

Team Members

 * Lemuel Sun
 * Zechariah Bennett
 * Michael Nugent

Summary
The team spent the last four weeks In an attempt to create a remote control boat that would be mounted with a remote control turret. In order to accomplish this, a boat needed to be fabricated, and then an arduino would need to be connected to a separate remote control which would control the turret. Many designs were created and sketched in the team members notebooks, and multiple decision matrices were created to facilitate the choosing of a specific design. Of all the designs propositioned, the electrical gearbox was chosen. This would allow For drastically faster firing than a single shot mechanism. The team also decided that should purchasing a remote control boat be I feasible, the boat should be constructed using styrofoam, in the style of a dual pontoon.

Story
When we first set out to construct a remote control boat with a remote control turret, we had to realize as a team that specific parts of the project needed to be completed prior to other parts. For example, in order to begin drawing up designs for a turret, we needed to procure a boat. This would give us the maximum dimensions and mass that our turret could be. Then, designing the turret could begin. After creating decision matrices, we found that the electrical gearbox taken from an airs off gun would be the optimal solution, seeing as it has the highest power, fastest firing speed, and greatest ease of installation. Next, we needed to hack a tv remote to connect it to an arduino so that it might be used to control the turret. In order to accomplish this, we attached an ATI Wonder remote to a Beagle, which intercepts and translates he signals that the remote sends out. It was here that we met our first true obstacle. None of the members of our team have had any prior experience with programming, and this certainly was not a beginners task. We succeeded in intercepting the signals, but we had no clue as of how to program the arduino to respond to the signals. Then, we ran into problems with the remote software as well as the arduino software. It seemed to work sporadically, actually functioning on a seemingly random basis. It would work one day, and then refuse to even open the next. We decided then to start a more me handicap approach to creating our project. Using nails of a uniform mass, we tested the buoyancy of common styrofoam. We found that approximately 6.9 grams of styrofoam can float 1 kilogram of mass, which is a very desirable ratio.

Decision List
Multiple decision matrices were created (Higher scores are more desirable)

Material List
1. List materials used, quantity, size, cost. 2. Describe what needs to be purchased in the future to continue working on this project.

Table wont stay in section, see bottom of page.

Software List
Arduino control software installed to laptop. This program allows for the programming of the arduino board, which then will allow the control of devices attached to the arduino board such as motors or even the remote control board.

Time
26.05 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.

Installing the Arduino Software

Arduino Motor Programming Tutorial

Next Steps
List specific details, advice, describe the current problems that the next team faces associated with the project here.

1. Programming: The programming was a problem for our group. None of us were any good at programming and even when we tried to learn we didn't fair so well. Zach and Mike made some progress playing with the remote control hacker but that did not get far. This, however, is a fairly simple fix and was most likely just a fault on our own part.

2. Safety/Legality issues: Part of the boats original design was to include an airsoft electric gun (AEG) weapon system on the boat and have it fire by remote control. The problems with that are that ordering the gun would bring up legal issues and bringing any active pieces to school would also be an issue. The reason is that technically, airsoft guns are designed to be incredibly realistic yet only fire small 6mm plastic pellets. Still, this brings up safety issues and would need to be proved to the school that airsoft guns are not dangerous and that following basic safety precautions and common sense can prevent any sort of real injury or problems. This would need to be summed up in a safety report and submitted to Foerster to submit to the college.

Really our biggest problem was getting our hands on the equipment. The model boat that we ordered did not arrive until the last week of the project and the parts that we would need to order for the weapons system were found to be a threat to the school and would need to be cleared first. We have designs and tutorials that we could follow but until we had parts it was basically obsolete.


text:
Engineering Projects/Robot end effector/Howard Community College/Spring2012/p1501mjj

Problem Statement
Need to make a robot arm that will pick up objects.

Team Members

 * Michael Hicks
 * Jon Fourney
 * Jonathan Sunday

Summary

 * Our goal was to create a more efficient structure, and make interchangeable robot hands between the coffee grinds hand and the fin ray claw and to exclude the use of the original Lego motors/parts. The original coffee grind hand had been big and bulky so we down sized completely and cut the weight of it big time while keeping the ability to hold objects the same. As for the fin ray we redesigned the structure and leaned more towards a mechanical claw controlled by a motor with gears and an Arduino. As for the structure, we completely rebuilt a table top like surface out of wood that will support the robot grippers rather than the original cardboard box. Next, in order to replace the Lego motors/parts we created three push/pull devices that that run to the coffee/claw grippers. The motors we are using are three stepper motors that are controlled by Arduino's to push/pull each rod to have the arm mimic the moments or an elephants trunk and pick up anything underneath it.

Poster

 * Project overview

Story
To begin the project we all set off in our own general directions. Jonathan Fourney began work on the coffee grind hand, Jonathan Sunday the finray claw, and Mike Hicks began working with the arduinos. Fourney attacked the coffee grind hand armed with the knowledge of the previous group. He took the previously made hand that was slightly large for the teams taste and created a scaled down version. To do this he used a sink drain and some pvc couplings and created the basis for the hand itself. Which was less than half the size of the hand made by the previous group. Then came time for him to begin experimenting with the balloons. He used average birthday balloons, filled them with coffee and tried them in the hand. The problem was that the balloon was way to small and to much force was required in a downward fashion to grab anything. So he decided to get another balloon at a bigger size and try not only a coffee version, but a sand version. After rigorous experimentation with both he found that the sand hand worked much better and this is what he decided to go with. Then one day he started messing around with the hand and tried the balloons without the drain on the end. In doing this he found out that he was losing a tremendous amount of suction through the threads. This young man is currently trying to correct the problem. Sunday was tossed into this project and found himself perplexed at the task ahead. In order to overcome this problem he began extensive research on how to form an effective fin ray claw that was much more sturdy than the original paper constructed claw. He discovered a claw that gave him a great feeling of hope. This claw uses a worm drive motor to control the fingers themselves. This way the fingers did not have to bend and could be constructed of metal. By connecting the fingers to gears the worm drive motor will control its movement at the touch of a button that control the arduino. However, now he faces the challenge of how to keep the fingers in place around the motor. Hicks began his work devoted to learning the ins and outs of the arduino controls. This was very important because this function will be the brains of our operation. By studying how they function and looking up various tutorials he strengthened his knowledge of their function. In order to pin point the movement he decided to place a grid at the bottom where exact points can be made. This way we can discover the exact movement needed to hit each spot and record all of the data. Once finished it should prove to be very effective. Once all of each members work is done it will all be placed on a much more sturdy structure than the original cardboard box. We have made a table out of wood that will prove to be much more effective. Instead of lego motors we have gotten stepper motors that will control the movement of the arm itself. The arms eventually will be made so that they are interchangeable very easily. In the end this should prove to be a very successful project.

Decision List
Most of the formal decisions made were concerning the times in which we would meet up outside of class. Because we are all very busy people there were only limited times of certain days that we could meet up. So this was always a difficult process. We also had several arguments that turned to formal decisions after much debate. One big decision was how we would make the arm interchangeable,because this affected everyone's project a formal decision was necessary. The other was how we would split up who did what work. Because there are many aspects of the project that require different knowledge. Also the decision matrix below shows which material for the vacuum powered hand we want to use.

Material List
1. List materials used, quantity, size, cost.
 * 1. Sink drain
 * 2. PVC coupling and bushing
 * 3. Blow gun air nozzle
 * 4. Coffee grinds
 * 5. Sand
 * 6. 12 inch balloon
 * 7. Silicone
 * 8. Air vacuum
 * 9. Air hose
 * 10. Sheet metal
 * 11. Gears
 * 12. 1 DC motor
 * 13. 3 Stepper motors
 * 14. 2 2x2 wood
 * 15. Screws
 * 16. Maker Bot wire
 * 17. 2 Arduino's w/ motor shields
 * 18. Scrap Wood
 * 19. Arduino wires
 * 20. Computer

Future Materials Needed

 * 1. 2 Stepper motor
 * 2. Paint
 * 3. Sheet metal
 * 4. Arduino
 * 5. Pivot joint
 * 6. Metal rod

Software List

 * 1. Arduino Software- Used to program the Arduino's to control the motors.
 * 2. AutoCad- Designed the coffee grind robot hand.
 * 3. SketchUp- Designed the mechanical claw.

Time
52 hours total.

Tutorials

 * [|Coffee Grind Robot Hand]
 * [|End Effector Round 2]
 * [|End Effector Round 3]
 * [|Base Structure]
 * Stepper motor mount

Next Steps
Because we all elected to stay on the project our next steps will mostly be fine tuning our current work and combining everything that we have done up to this point. We will need to connect the hands to the make bot wires connected to the motors. Next we will have to find a way to extend the hand out when needed. This is for the coffee grind hand because force must be applied downward for the balloon to surround the object so that it can get a hold of it. The plan for this is still up in the air and is not for certain yet. The finray claw still needs some work but is looking promising. Once a method to fashion the fingers to the motors is made it will be in working order. To future groups I advise them to expect a lot of construction type work. There is much more of this than computer work. Also to use bigger balloons and test to make sure a good vacuum is being created within the coffee grind hand. Other than that this is a really fun project and anyone taking it on will be pleased.


text:
3D Scan/Kinect Makerbot/Howard Community College/Spring2012/P1501msn

Project documentation focuses on how the team organized itself to tackle the unknown. This is a creative process. The details learned should be captured in tutorials. Project documentation should focus on how the team organized itself to step out into the unknown. Failure is common. The single most effective way to increase engineering respect is to document failures in a creative way that stimulates, inspires and helps others continue the project. Projects are never done. There are always loose ends. There are always decisions that might have been made more clearly, there are always other alternatives that might have been considered. None of this stuff appears in a tutorial. It does appear in the team documentation.

Problem Statement
Have an efficient way of checking attendance in classrooms by using a webcam.

Team Members

 * Sam Ang
 * Mirza Baig
 * Nathan Renkenberger

Summary
Our goal is to have an automatic check in system in classroom. Using the Kinect's camera and IR technology. The Kinect can view people in 3-D Space (x,y,z) and can identify bodies in its scan region. We will mount the Kinect that has the best view of the door entrance and have it connected to a PC that will automatically run the software on the appropriate times.

Story
The first week team members worked to gather information and find software for Microsoft's Kinect and to look into existing facial recognition programs. This week included searches in open source packages and Microsoft Kinect Toolkit for the Kinect and looked into addition features that the Kinect can do such as 3D recognition, voice recognition, Skeleton Structure viewer, and Motion detector.

 * The second week the team continued working on week 1 assignment, exploring around the numerous features the Microsoft Toolkit has. Noticing the Toolkit has a Skeleton Viewer that identifies a human structure, we then tried to take advantage of this feature and use it to recognize and identify people. In so doing, we had to first be able to count the number of students entering and exiting an area. We brainstormed ideas on how to implement the Skeleton Viewer feature and use it to count people. As shown in the picture below, we wanted it to count as soon as it identifies a person.

Our first idea was to search through software online that already has this feature. However, as reading through forums, other users tweaked the code of the Toolkit that is written in C++ language. No one in our group knows anything about C++ language, but some team members know a little bit about java, so we continued to explore the classes and methods and did not go anywhere. Our second idea was to make a decision matrix and let friends and classmates take a quick survey whether to use webcam or Kinect in our project the decision was close, so we split the project into two. One person finds software for a regular webcam and two members explore the Kinect.

 * The third week the team started coding the Kinect with the use of Microsoft Visual C# and OpenCV. We created algorithms as guideline in what methods and classes to make in order to start programming.

Motion{ //mehtod that when detects a skeleton structure implemented with Kinect's toolkit I had in Week 1's assignment would take a snapshop int NumberStudents = 0; if skeleton detected && skeleton moves left{ for loop (Number of face recognized) //loop until number of recognized identities been recorded in attendance chart String Name= snapshot; //goes to snapshot method and takes picture and returns name of students Attendance(Name); //goes to Attendance method uses the parameter of "Name" to check attendance. NumberStudents = NumberStudents + 1 }else if skeleton detected && skeleton moves right { NumberStudents = NumberStudents -1 }else { null } system.out.print("Number of student attended class was: " + NumberStudents); //displays the number of students attended this class. } public String snapshot{ Sting NameOfStudent; //takes picture and saves picture to hard drive. NameOfStudent = //search and identify faces from picture database return NameOfStudent; } public void Attendance(Name){ //goes through Microsoft Excel and search through the parameter "Name" and marks the person present. }

We also explored Keylemon a facial recognition program for webcams and attempted implementing it with OpenCV to see its compatibility. We also looked into Google software Picasa and looked into how its facial recognition works.

 * During the fourth and final week, members were brainstorming mounting areas in the classroom. Pictures shown below:

a mount that will have velcro at the bottom to hold the Kinect.

One member found motion detection software Yawcam that automatically take a picture when any motion is detected. We then figured out that this could be implemented with Picasa's facial recognition software. As motion is done by students it is detected by Yawcam, it takes a picture and saves it to a specific location that Picasa will then automatically scan the directory in which Yawcam saves its picture and tries identify people from Picasa's people database. This was our working project.

Decision List
Our decisions were mostly based upon testing on ideas and software found; and improving upon failed tests. Our first decision was to either use Microsoft Kinect or just a regular webcam. We listed the advantages and disadvantages of using each of the devices. This video showed the 3D face recognition the Kinect can do by hacking it. Moreover, the Microsoft SDK Toolkit from this link has a feature that detects a person's body in a form of a skeleton. So we figured we could use this to identify human beings and use the 3D facial recognition to identify who the person is. However, the main point is that with the use of a regular webcam, we can also do any of these hacks. We decided to make a decision matrix and let friends and classmates take a short survey, the decision table is shown below.

So we decided to split the project into two since the decision matrix's result came so close together and to put more challenge into the team. We had two people deal with the Kinect and one person deal with a regular webcam. We thought that the Kinect would have more hacking and coding to do, so we would have more people there.

Having worked with the Kinect there were a lot of Classes and Methods we have to look into to implement codes. We had some experience in C++, Java, and Visual Basic to code a program from scratch. We came across different programming software such as OPENCV, Visual Basic, and Visual Studios that will be compatible with the Kinect's toolkit packages. We made algorithms after algorithms that we thought would be used as a guidelines to program. After stressful week of programming and downloading software to be used, we eventually decided to shifted from the Kinect to a regular webcam because we found a software that enables us to identify people through the discussion made in our presentation in class using Picasa. From this we all worked together and focused on using the webcam and searched through various software such as KeyLemon and Kinemote to improve our project.

Material List
1 Webcam

1 Kinect

Computers

In the future, it would be best to have a better webcam device. A webcam that has better picture quality, in our project we used a VGA webcam supplied by the school that took very blurry pictures which results in a difficult time in recognizing identities.

Software List
Software used in our projects:

Lenovo's Verface - facial recognition software that locks and unlocks user profile on windows based PC.

Microsoft Kinect SDK Toolkit - Toolkit that has a Skeletonial Viewer feature that can be tweek to identify and count the number of people.

Visual C# - Programming software from Microsoft whos primary language is C# has a built in references to the Kinect API. Allows you to easily load Kinect's packages and use throughout the project.

OpenCV- Another programming software that has references that are compatible with a regular webcam to create series of programs with the use of a regular webcam

Picasa by Google - Photo management program that has facial recognition capabilities it identifies people's face on pictures and can sort pictures by recognized people in photos.

Yawcam - A freeware webcam software that has motion detector applications that takes picture when something crosses the defined area. Also has capabilities for security purposes and can automatically transfer pictures to another PC on a network

The only softwares used were Picase and Yawcam, the other softwares could be used as well, however it would require more experienced programmers to hack the Kinect and program a Graphical User Interface (GUI).

Time
Total Time Spent of project: 24 hrs 1 min

Tutorials
Use these programs together. Complete Picasa tutorial before moving on to Yawcam tutorial.
 * /Picasa Tutorial/
 * /Yawcam Tutorial/

Next Steps
Our project has finally work. However this could always be improved such as using Microsoft Kinect instead of a regular webcam, where the Kinect has the ability to replicate a 3D model of people's face to have a better identity of the forms and facial features of people's face. Moreover, instead of using other company's software, coding and making your own program will be best because it shows ownership and skill. Due to lack of time and inexperience C# programmers, we wanted to have a working model, so we used Picasa and Yawcam's features. We began writing algorithms, but was not familiar with C#'s language, if Kinect was compatible with Java this project would be much easier.


text:
Engineering Projects/Rubberband gun/Howard Community College/spring2012/p1501jds

Problem Statement
To create a Rubberband Gun that is powerful and accurate and doesn't expend all our resources.

Team Members

 * Jsnyder6518
 * Stevecole888
 * Dgilliland

Summary
Everyone in the group had a chance to design a rubber band gun and we took the best ideas from all. We concluded that the double barrel design was best as stated in matrix. Then we started designing all the parts on 123D Auto desk. Once completed we could order the exact amount of wood/materials needed to build our project since we had a design to build off of. Everyone took home wood to create a part and we brought it back into school to assemble.

Poster
this is a link to the design that we came up with design graphic of gun

Story
There was many obstacles not forseen when we took this project. We were not very familiar with 123D autodesk which was used to create our design. Also at first we wanted to build a single barrel gun but found out that it would be unstable and by using a matrix we all voted on different catigories to deside what the best design would be an dwe desided on the double barrle mostly because it would be the most stable. we tested how long the rubber bands would stretch and the best rubber bands we could find could only stretch 18" so that is why our barrel is 18" long so it is of optimun power without rubber bands breaking. In the end we failed at buiding the complete gun and only got 1 barrel done. But in turn we learn more about 123d, engineering process, and will be much more prepared for the next project.

Decision List
LOW IS GOOD We made the obvious decision of making the Double Barrel Rubber Band Gun. in addtion to that we made desition to use softwear 123d and create design also decided to make barrel 20 in because of how far rubber bands can stretch

Material List
1. List materials used, quantity, size, cost. 24' 1/4" Dowel Rod ($.72 per 4') 16' 2"x3" ($1.89 per 8') 8" Wood Circle (4)($6 each) Variety of Screws (Taken from workshop)

2. Describe what needs to be purchased in the future to continue working on this project.

24' 1/4" Dowel Rod 2 Cheap Drills Metal Rod (in shop) LONG Rubberbands

Software List
1 2 3d by Autodesk

Google Docs

Time
45 hours and 10 minutes

Tutorials

 * 1. We cut 8 inch circles, made out of 1 inch thick wood.
 * 2. Then we made notches in it to put the dowel rods in.
 * 3. We put the dowel rods in notches.
 * 4. We made the tripod to hold the gun.
 * That is as far as we got, spent most of the time waiting for materials and making the graphic(1 2 3d kept crashing).

Next Steps
The next group that will do this project will need to finish drilling the holes in the turning circles, then they will need to find rubberbands that will stretch 18 inches. The curent problems are setting up the trigger mechanism and gears, then they will have to figure out how to make the gun turn since we did not get that part set up. then they will need to make sure that it is firing correctly and make the wedge move like it is supposed to. When working on this take any part that what you are working on home so you can work on that to.


text:
User:Mnugent

Michael Nugent

Howard Community College

Columbia, Maryland

Classes:

/enes100/

title: User:Mnugent


text:
User:Zbennett

Zechariah Bennett

Student of Engineering

Howard Community College

Class Projects that I am involved in:
 * /enes100/

title: User:Zbennett


text:
User:Emspangler

I'm from New Jersey and I enjoy traveling.

/enes100/

title: User:Emspangler


text:
User:Sang1938

/enes100/

Samuel Ang Howard Community College Majoring Electrical Engineering

title: User:Sang1938


text:
User:Mbaig5753

Mirza Baig Pursing Mechanical Engineering degree Reside in Maryland

/enes100/

title: User:Mbaig5753


text:
User:Kdelvill4474

 * Kim DelVillar
 * Student at Howard Community College
 * Howard Community College
 * Columbia, Maryland USA

 * These are the projects I am involved with:

/enes100/

title: User:Kdelvill4474


text:
User:Emspangler/enes100

Wind Turbine

 * /My Work/

Rube Goldberg

 * /My Work P2/

Air Plane Float

 * /My Work P3/

title: User:Emspangler/enes100


text:
User:Pjmarsden

/enes100/

Patrick Marsden

title: User:Pjmarsden


text:
User:Mnugent/enes100

Michael Nugent

Model Boat

/My Work/

title: User:Mnugent/enes100


text:
User:Lsun224

Lemuel Sun

Howard Community College

Columbia, Maryland USA

 * /enes100/

title: User:Lsun224


text:
User:Pjmarsden/enes100

wind turbine

/My Work/

/My Work 2nd 4 week cycle/

Wind Turbine 2nd 4 week cycle

Music Team page

/My work Music/

title: User:Pjmarsden/enes100


text:
User:Mbaig5753/enes100

3-D Scan and /My Work/

Bridges and /Bridge: My Work/

 * Airplane Float and /My Work P3/

title: User:Mbaig5753/enes100


text:
User:Garcia123

Martin Garcia Student at HCC

/ENES100/

title: User:Garcia123


text:
User:Jsnyder6518

This Jon Snyder's main page.

/Enes100/

title: User:Jsnyder6518


text:
User:Zbennett/enes100

Model Boat

/My Work/ (model boat)

/My Work (Rube Goldberg)/

Rube Goldberg

/My Work (Rube Goldberg 2)/

Rerb Gerdberg 2

title: User:Zbennett/enes100


text:
User:MundaneUser

/enes100/

Kyle Gallun -

title: User:MundaneUser


text:
User:Dross4565

 *  David Ross
 * Student at Howard Community College
 * Majoring in Mechanical Engineering
 * Currently taken this class:
 * /enes100/

title: User:Dross4565


text:
User:Natebeger/enes100

 * 3-D Scan and /My Work/
 * Bridges and /My Work P2/
 * Airplane Float and /My Work P3/

title: User:Natebeger/enes100


text:
User:Sang1938/enes100

3-D Scan and /My Work/

Bridges and /Bridge: My Work/

Airplane Float and /Airplane: My Work/

title: User:Sang1938/enes100


text:
User:Natebeger

/enes100/

title: User:Natebeger


text:
User:Dgilliland

This is DGilliand's main page /enes100/

title: User:Dgilliland


text:
User:Wesley Rodriguez/enes100

Coanda

/My Work/

/My Work 2.0/

title: User:Wesley Rodriguez/enes100


text:
User:MundaneUser/enes100

Wind Turbine

 * /My Work/

Wind Turbine II

 * My Work II

Beatmaker

 * My Work III

title: User:MundaneUser/enes100


text:
User:Jsunday9

/enes100/

title: User:Jsunday9


text:
User:Jsunday9/enes100

Robot End Effector

Robot End Effector2

Robot End Effector3

/My Work/

/My Work2/

/My Work3/

title: User:Jsunday9/enes100


text:
User:J4knee21

/enes100/

title: User:J4knee21


text:
User:303428mwatson/enes100

Student, Howard Community College. Columbia, Maryland 21044, USA.

Coanda Effect

 * /My Work/

Coanda Effect 2

 * /My Work 2.0/

Putt Putt

 * /My Work 3.0/
 * Arduino Compilations

title: User:303428mwatson/enes100


text:
User:J4knee21/enes100

Robot End Effector

Robot End Effector2

Robot End Effector3

/My Work/

/My Work2/

/My Work3/

title: User:J4knee21/enes100


text:
User:Limelindfors

Lime Lindfors in the place to be! Wanting and trying to learn everything! :)

title: User:Limelindfors


text:
User:ChimaEz/enes100

Coanda Effect

/My Work/

/My Work 2.0/

title: User:ChimaEz/enes100


text:
User:Lsun224/enes100

Model Boat

/My Work/

Rube Goldberg

/My Work 2/

Rube Goldberg 2

/My Work 3/

title: User:Lsun224/enes100


text:
User:Stevecole888/enes100

This is all of my groups work/My work

/My_Work/

/My_Work2/

Rubber Band Gun

Bridges

/My_Work 3/

Bridges arch

title: User:Stevecole888/enes100


text:
User:Stevecole888/enes100/My Work

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

To create a Rubberband Gun that is powerful as well as accurate and doesn't expend all our resources.

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

I must create design for trigger, tripod, and motor so they can all interact with eachother with no problmes

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

created a couple designs and we have all desided on a supreme design and are ready to start creating it in autodesk123d

Week1 Narrative
I created the barrel of our gun on autodesk 123d and sent it to my teamate to attach his design of the triggers and also am created a list of materials to buy

My Second Task
make a list of materials and also inspect the design that teamate create on 123d autodesk so there is no major flaws in any part of the design

Summary of actual work over second weekend
created design of our gun in 123d autodesk

Week2 Narrative
I created the barrel of the gun in 123dautodesk and sent to team

My Third task
get all wood necessary and start building my assigned parts

Summary of actual work over third weekend
How is what you did different than what you planned? I Tryed to create a google docs of the design of our gun in 123d autodesk but failed miserably, also sent list of materilas to buy to professer to buy so we can start building our project.

Week3 Narrative
I built the barrel to the gun, I cut the Dow rods down to size, created the knock in order to hold the rubber bands when pulled and told my partners i was finished and we should start combining parts next Wednesday.

My Fourth task
I need to start assembling the parts that everyone made so we can have the gun working before time runs out

Summary of actual work over fourth weekend
I took the dow rods home and cut them to 18" parts and also 1" parts becasue the rubber bands cant strech that much so 18" is a maximun stretch of the best rubber bands we have and it is accurate to the design that i created on 123d autodesk

Week4 Narrative
Tell a detailed story describing what you did for your team over the weekend. Created the needed parts fo the barrel which are the 18" dow rods which is what was designated in the design. also created knotches in each of the dow rods so the rubber band have somewhere to attach to when streched, which was also specifyed in the design

Complete Project Page
Follow the "project done" format.

title: User:Stevecole888/enes100/My Work


text:
User:Mikehicks/enes100

Robot End Effector

Robot End Effector2

Robot End Effector3

/My Work/

/My Work2/

/My Work3/

title: User:Mikehicks/enes100


text:
User:Dgilliland/enes100

Rubberband Gun

/my work/

/my work 2/

bridges

/my work 3/

bridges2

title: User:Dgilliland/enes100


text:
User:Jsnyder6518/Enes100

 * Rubber Band Gun
 * /My Work/
 * Bridges
 * /My Work 2/
 * Bridges 2
 * /My Work 3/

title: User:Jsnyder6518/Enes100


text:
User:Kdelvill4474/enes100

Kim DelVillar Student at Howard Community College Howard Community College Columbia, Maryland USA

These are the projects I am involved with:

 * Car Hack

/My Work/

 * Car Hack 2

/My Work 2/

 * Rubberband Gun

/My Work 3/

title: User:Kdelvill4474/enes100


text:
User:Jsnyder6518/Enes100/My Work

Write problem/project Goal
What is your wording of the overall problem/project goal?
 * To create a Rubberband Gun that is powerful and accurate and doesn't expend all our resources.

My First Task
What are you going to do for the team this first weekend?
 * I need to design a rubberband gun.

Summary of actual work over first weekend
What I planned to do was to do design a Rubber Band gun and then order what we needed, but we had some things we had to change.

Week1 Narrative
During the weekend I designed a version of a Rubber Band Gun we could use.

My Second Task
I'm planning on designing the trigger mechanism for the Rubber Band Gun in 1 2 3d by Autodesk.

Summary of actual work over second weekend
Well when I said I designed something I got the terminology mixed up, but I was hoping to be able to start working or at least have had order what we needed.

Week2 Narrative
Over the weekend I added what I created to the gun, which was the trigger mechanism.

My Third task
I'm planning on at least getting our parts ordered and to figure out what we want to start first on.

Summary of actual work over third weekend
I had planned that I would have a full 3d picture of the Rubber Band Gun and to have started putting it together by now.

Week3 Narrative
I tried to complete the picture of the Rubber Band Gun that we want to make but we had difficulties with 1 2 3d. It would freeze every time we would copy and paste.

My Fourth task
I'm going to cut out the circles for the Gun in which the dowel rods sit on.

Summary of actual work over fourth weekend
The main thing I hoped to get done was the building of the actual gun, but that didn't happen. I just had a lot of troubles with the drawing of the gun, so i just took the parts we had to create a some what accurate picture.

Week4 Narrative
During the weekend I completed the Rubber Band Gun team page and did the last bit of work on the barrel of the Rubber Band Gun.

Complete Project Page
Follow the "project done" format.

title: User:Jsnyder6518/Enes100/My Work


text:
User:Dgilliland/enes100/my work

Link to team page.

Write problem/project Goal
create a design for a rubberband gun, and a tripod

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

I will find the materials that we will need for the tripod and the rubberband gun and make a design for the tripod and rubberband gun.

Summary of actual work over first weekend
The work that I did over the first weekend was mostly what I planned to do I made a design and then when a design was picked in class I made a list of materials then. This was different since i planned to make the list over the weekend/

Week1 Narrative
For my team I made a design for a tripod, i made sure that the design would be stable so i made the bottom flat and made three legs so that the stand would be sturdy. Then i came up with an idea of using a block of wood withe spikes to load the rubberband gun by pulling the rubberband over the barrel to the trigger to make reloding quicker and easier. Then i decided to make a gatling gun instead of a one shot gun so that it could be used longer. Then i put all of my ideas into a stetch so that it could be seen togethor.

My Second Task
For my second task I will be making a 3d design of the tripod and of the reloder that I designed.

Summary of actual work over second weekend
This is not different than what i said i would do because i did create a 3d design of the reloder and the tripod.

Week2 Narrative
During the week i downloaded 123d software so that i could make my 3d design then i made my reloder which i did by making a rectangle from under create. Then i made cylinders from under create and attached them to the rectangle to make the reloder. To make the tripod i dtarted with 4 rectangles 3 legs and a center peice with a cylinder to mount the gun on so that it can swivel. Then i attached all of the peices togethor so that it made a tripod.then i tried to figure out how to upload to google docs. which i have not done yet so it will be done by next week.

My Third task
Once we get the materials i plan on starting making the design with the peices that i am assigned.

Summary of actual work over third weekend
My week went as planned because i made the tripod, wedge and end peices of the gun.

Week3 Narrative
over the weekend i created the end pieces, tripod and wedge for the rubberband gun. To make the end peices i just cut two 2 foot sections as a front and back peice which will add to support to the rubberband gun. To make the wedge i made a 20 inch piece and two 2 inch sections which i screwed onto the top of the end of the 20 inch piece to make the wedge. To make the tripod i cut three 2 foot section and a 5 inch section. on the 5 inch section i cut 30 degree angles on each end then the two 2 foot sections that connect to the 5 inch part i had 30 degree angles. On the bottom i had 15 degree angles. for the front leg the bottom had a 30 degree angle and the top had a 45 degree angle then scrap angles from 15 and 30 with alternating ends facing opposite directions to make a better fit.

My Fourth task
During the final week i plan on assembling the rubberband gun and then testing it to make sure that it is working like it is supposed to.

Summary of actual work over fourth weekend
I did what is said because i cut my peices and then i worked on fitting them togethor.

Week4 Narrative
over the weeken i drilled a hole 6 inches from each end on both the front and rear pieces then all of my pieces were ready for assembly and everyone else needed to do there part so we could assemble the gun.

Complete Project Page
Follow the "project done" format.

title: User:Dgilliland/enes100/my work