Monday, April 10, 2017

week 12


                                   Muhannad's Rube Goldberg





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




picture 1.1: drawing for circuit


2. Explain your setup.
Mu set up starts with force sensor that is connected to 555 timer, 555  timer will be connected to 5 v source and the output of the timer will be  connected to the Decimal counter 74192, then I connected the decimal counter to display driver to turn on 7-segment and to the XOR gate to turn on the motor. Connecting LED to the XOR so when the motor on, the LED will be on. I used transistor so when the the 7-segment reaches four, there will be enough current to turn the motor on and when the motor is on, it will pull a string that is connected to the gate in bottle of water, when the gate is released, the water will go through a pipe to other bottle that is attached to a balance, so when the bottle is full he ball will go up and it will through a tube to hit some dominos.





3. Provide photos of the circuit and setup.

photo 3.1: picture of the circuit

photo 3.2: picture of the circuit

photo 3.3: picture of the circuit



4. Provide at least 2 videos of your setup in action (parts or whole), at least one being a failed attempt.




                                                     video 4.1: shows how circuit works

5. What failures did you have? How did you overcome them?
some of the failures I had is that my XOR wasn't sending enough voltage and that was hard to figure so i was trying to disconnect all components and measure XOR output alone but when i took LED?light out, I measured the voltage and it went up. Also, another failure is that how to connect the string on the motor to the gate on the first bottle and that I am trying to figure it out.



 Lucas’s Rube Goldberg





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




Picture 1.1 shows the schematic of my original circuit 

Picture 1.2 shows the schematic of my mechanical part of my machine 



2. Explain your setup.

 As the force sensor is pressed the voltage is sent through the Opam where it is increased enough to switch the relay which then powers the 555 timer which then starts the counter which sends a signal to the driver to display numbers 0-9 on the display, and it also sends a signal to the XOR gate which will be set up to activate the LED between numbers 4-9 which would trigger the photosensor to decrease its resistance and allow the motor to run.
The machine is a three step down ramp where a golf a ball is released down the ramp when the motor is activated and pulls open the gate to the ramp the ball then exits the ramp and fall into a cup which is attached to a string when the cup falls the pull then pulls on a platform that then makes dominos fall over leading to the next circuit. 




3. Provide photos of the circuit and setup.
Picture 3.1 shows picture of circuit 

Picture 3.1 shows picture of circuit 

Picture 3.1 shows picture of three step ramp 

Picture 3.1 shows picture of motor and starting gate 

Picture 3.1 shows picture of the cup pulley and the platform 





4. Provide at least 2 videos of your setup in action (parts or whole), at least one being a failed attempt.


Video 4.1 shows a failed attempt force sensor did not activate the circuit
Video 4.2 shows a successful run of the circuit but the motor was to connected 




5. What failures did you have? How did you overcome them?



I faced a problem with getting the 555 timer to work and activate the rest of my circuit so I decided to skip the digital circuit and just have the relay go straight to two 7 segment display which would give a read out of "GO". I also faced a problem with the PhotoSensor, so i decided to use a transistor instead running a 11 volt source through a resistor then to the collector on the transistor and the 5 volt from the relay to the base of the transistor. Lastly I ran the emitter output to the motor.

9 comments:

  1. Muhannad, I am very excited for your mechanical contraption! Good idea. I look forward to seeing it in action tomorrow.
    Technical drawings for circuit and mechanical parts are needed.
    Although you have enough circuit components, the use of circuits are a bit simple. I want it to be more complicated.

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  2. Luke, I do not see any mechanical part yet. I want a bit more circuit complexity as well. You need technical drawings for electrical and mechanical parts.

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  3. Lucas, at the time I am reading this there is no mechanical component that will trigger the circuit after yours. Otherwise, I'd say pretty decent circuit. I am worried about my circuit being too short timewise, I am going to try to counteract this by having the motor lift my weight slowly. What are you doing to extend the time of your circuit?

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  4. Muhannad,
    Using water is a brave option. I would think that it should work well, as long as the motor is strong enough to pull the gate open to let the water out of the bottle, it does appear you are using a relay which should make sure the motor is gets enough current.

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  5. Lucas, Should be a straightforward electrical approach but I do not see any mechanical side of your system. I also attempted to use a photocell resistor with a LED but I was unable to get enough light to reduce the resistance enough. Did you have that problem as well?

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  6. Muhannad, In your RG circuit's setup I thought it was creative and useful that you connected a motor though a transistor from your 7 segment display. I think its important that you show how you plan on doing the mechanical contraption, it seems very complex and I'm excited to see how it works. Your videos do not show how your circuit necessarily works, your circuit definitely needs work.

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  7. Muhannad, your mechanical portion is very unique, and I am curious to see how the bottle will be incorporated. I also had experienced some issues with connections affecting my readings. I solved this by disconnecting one input at a time.

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  8. Muhannad, Nice project! creative mechanical part. I hope it works with you. Did you have a problem making the LED working by connecting it to the XOR gate? change my gate from XOR gate to AND gate just to get the led to work.

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  9. Lucas, nice setup it is really close to the one that I was trying to setup, but I lost lots of time just trying to make the force sensing resistor work with the opam which force me to get get ride of the opam. I am glad that you were able to make it work. I will step by tomorrow to take a look at it. For the mechanical part I am really excited to see it. It will be nice to watch.

    ReplyDelete