Sunday, April 16, 2017

Angel Week 13 Blog

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

2. Explain your setup.

-The circuit begins with a 5V source connected to one end of a photocell and a ground source connected to the other pin of the photocell. The photocell is then connected to pin 3 of the Opamp. A ground source connected through a 3kOhm resistor is then connected to pin 2, this same source is also connected to pin 1 through a 3.9kOhm resistor. A voltage source of 5V is connected to pin 4 of the Opamp. Pin 1 of the Opamp which is the output is connected to pin 2 of the relay. A voltage source is connected to pin 1 of the relay and a ground source to pin 5. The DC motor is connected to pin 3 and and 7 segment display is connected to pin 4. The circuit begins with the 7 segment display turned on, since all the voltage going through the relay is coming out at pin 4. When a light source is applied to the photo sensor, it should switch the relay from pin 3 to pin 4 and make the DC motor go off, therefore starting the Rube Goldberg.

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

Photo #1 of Setup

Photo #2 of Setup

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

Failed Attempt

Successful Attempt

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

-There were several problems I experienced while setting up my Rube Goldberg project. One of the biggest ones was making my circuit complicated enough. Although I did manage to implement all 5 necessary components into a small and not so complicated circuit, it was still too simple. I will fix it this upcoming week by modifying the input and output of my circuit coming from and going into the other Rube Goldberg projects. I will add more components in order to achieve a more complex circuit. One of the other failures was being able to come up with a mechanical part that could easily be adaptable to the following circuit, since it has to go from one side of the table to the other. I eliminated 4 different concepts before finally finding the perfect one.


  1. Angel, the cardboard looks to be a very reliable mechanical structure. You can always add an LED that turns on when a part of the circuit is activated to add more electrical complexity to your circuit.

  2. Electrical complexity is needed. Good circuit drawing. Mechanical complexity is something we need to talk about.

  3. Very nice setup for both mechanical and electrical parts. Do you think that you will be able to get the part for turning off the circuit done easily.

  4. I really like your circuit design. My only thing is this, what if the marbles aren't enough pressure on the FS resistor? what if it doesn't activate the voltage, then what? Also, what is the ping pong ball going to do to trigger the next circuit? And is the ping pong ball being thrown by your device or will it roll? Overall I think your circuit is great but maybe a golf ball instead of the ping pong ball will have enough power to trigger the next groups circuit.

  5. Your mechanical part is similar to the one i used in the second RG, using a cardboard is a reliable structure but i think the marble isn't heavy enough to activate the force sensor for the other person, using a golf ball would be a good way to activate the other circuit. For your circuit, it is great that you used all the components in this circuit, to make more complex you can put an LED light so when the ball go through the structure, it turns on.