Sunday, April 17, 2016

Week 13:
4/11/2016 - 4/15/2016

Haowen's RB

1. Provide the updated computer drawing for your individual RG setup.


2.Explain your setup.
First, my partner uses his RB drags a piece of paper so light will trigger photocell. Due to the input voltage is 10V, I use a resistor to divide the voltage which help me get 6V voltage. This 6V can trigger a relay which connect to a 5V power. 5V power can light four 7-segment display and show a word "COOL". Meantime, 555 timer, 74192 and 7447 can light another 7-segment display which will count number from 0 to 9. I use an and gate between 74192 and 7447 and connect it to input B and input C of the 7447. When both of this input have high value, the output of and gate will set into high position. And I connect a motor to this and gate. Through the truth table, when the number showed on the 7-segment is 7 or 8, the motor will spin. The motor ties to a column which holds another weight. When the motor spin and the column dragged by the motor, the weight will drop onto a mouse trip which will drag another paper. This paper cover another photocell. When light trigger this photocell, relay will have a zero output (pin 1 connect to ground) which will lead the and gate always has a low voltage output. So the motor will not spin after the mouse-trap is triggered.

3. Provide photos of the circuit and setup.
Photo of my circuit.

4. Provide at least 2 new videos of your setup in action, one being a failed attempt.


video of a failed attempt


video of a succeed attempt

My RG still needs some modifies because I still need my hand to move light source. However, I do not think this will be a problem since I can find more cellphone or small flashlight next time. 

5. What failures did you have? How did you overcome them? 
The first time I just used a paper rod to trigger the mouse-trap which did not have enough weight and sometimes the rob will fall down to some other sides rather than the central of the mouse-trap. So I attached another weight onto the rod which can trigger the mouse-trap perfectly and used two more paper to build a simple pathway. 

GROUP TASKS

6. Group task: Explain your group RG setup.  
As a group our RG machine starts with Adam's machine and then moves into Haowen's machine. Adam's will have dominoes that will cause a mechanical motion to start Haowens which will trigger a mouse trap to power the next group's machines.
7. Group task: Video of a test run of your group RG
 The video below is a test run of our RG machine. We ran into some technical difficulties on both of the machines. Adam's machine had difficulties pulling the note card in the correct direction and Haowen's machine did not trigger the mousetrap correctly. We will have everything fixed by the time we need to present to the class. 
Video G1: This is a video of our group RG machine in action.


Adam's RG.

1. Provide the updated computer drawing for your individual RG setup.

Picture 1: This is the new circuit diagram for my RG machine.


2.Explain your setup.

My RG machine is activated by a brief amount of pressure applied to my force sensing resistor. This allows the relay to "switch over" from an LED light. The motor will then pull a string attached to a card that is in between an LED and a photocell resistor. After the motor has pulled the card and the force is done being applied to the resistor the relay switches back over and the LED is lit once again. The LED lowers the resistance of the photocell resistor which will then turn on another motor. This second motor will knock over dominoes that will eventually start my partners RG machine and fall in the way of my motor, preventing anymore motion.


3. Provide photos of the circuit and setup.

Picture 2: This is the circuitry of my RG machine

Picture 3: These are the dominoes that will stop my machine and start Haowen's machine.


Picture 4: This is a view of both the circuitry and the dominoes.

Picture 5: This is a wide view of my circuit and Haowen's before we attempted a group trial.


4. Provide at least 2 new videos of your setup in action, one being a failed attempt.

Video 1: This video is a failed attempt of my RG machine.


Video 2: This is a video of my RG machine set up. In this video the dominoes are not yet set up to stop my circuit and to power my partners.



5. What failures did you have? How did you overcome them? 
My failures mainly came from mechanical actions. Setting up the dominoes correctly took a lot of time because they frequently failed or were knocked over prematurely. As well as that, we ran out of string to use for our circuitry so we had to re use string that had already been spun by the motor. Because it was already spun, the string did not pull as predictably as it should have. To overcome these failures I brought in new string to work with and tried different ways to set up the dominoes.

For #6 and #7 please look above my post and beneath Haowen's post.

13 comments:

  1. You do not plan to be holding your phone during the demo, right?
    Good attempt. I am sure you will work things out.

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  2. Hey Adam I like your setup, however your schematic drawing seems to be missing a few things that are important. The main thing is you just have arrows showing the order the components are used. Maybe you could add the pin numbers and what each pin is meant for to the schematic.

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    Replies
    1. I'll be sure to add more in the final drawings. Thank you for the input!

      Delete
  3. Haowen I like your setup. If you try and put your photocell's closer together on your bread board it maybe easier on you to get light on both of them from the same source.

    -Matt

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  4. Adam nice setup. I'm surprised that small of and LED is puts out enough light to lower the resistance on the photocell. I never would have thought to try that.
    -Matt

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    Replies
    1. It took a lot of trial and error with resistors and different voltages to allow the LED to actually power it. Thank you!

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  5. Solid ideas guys and it looks like you have everything covered to me. Iron out some of the smaller details and hopefully everything will work.
    –Andrew

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  6. Haowen, your design looks has been updated, and the new set up looks very nice! I really like the idea that the motor will stop spinning after the mouse trap being triggered, good job!

    Adam I like your set up! It’s so creative, especially the idea that to make the relay switch back, and I do hope our RG set ups can connect smoothly.

    --Yao

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  7. I like how both of your circuits have evolved since last week the addition of the LED and motor/note-card give Adam's circuit that little something extra it was lacking last week, while the replacing the solar panels in Haowen's circuit with photocells seems to have increased the circuit's overall consistency/reliability.

    Very Nice Work Guys

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  8. Haowen, your setup seems to be more complex then it was as of last week, which is great. Also, you used almost every component that we have used this entire semester which shows your knowledge in circuitry. Great job!

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  9. Adam, looks like a definite improvement from last weeks and a much smoother RG setup overall. You fixed what needed to be and used a few more components which is great. The dominoes make it more visually enjoyable then others as well!

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  10. Hey Guys. Just making my final comment for the class. I like the way you managed to put everything together in the last few week. It's impressive how many components you guys managed to incorporate into the circuit. Using a Force Sensor, a Relay, an LED/Photosensor and two separate motors to set a series of dominoes into motion definitely fits into the Rube Goldberg Theme, and that is only in the first half of your circuit. The Second half of the circuit (Haowen's portion) is equally as impressive. By using an amplifier you were able to harness the power of a single solar panel to power not only multiple 7 segment displays, but also an intricate timer circuit to intermittently drive your motor and culminating in the triggering of a mouse trap to start group 6's circuit.

    Let me close by saying I have enjoyed your blog throughout the semester, have a nice summer and I look forward to seeing you again in the Fall.

    ReplyDelete