* Temperature sensor
The setup should be considered to last 30 seconds.
Make sure to include enough photos, videos, and explanations for each “transition” or step. Explain your circuits. Put at least 2 issues/problems/struggles you faced during the project.
Video: Explanation of entire circuit and how it should work
Video: Final Rube Goldberg set upProblems:
As you can see when watching our final video, we only managed to get half of our set up to work. The heat sensor did not function as it was suppose to and ended up giving a negative voltage reading, and at other times, changing nothing in the circuit, gave a positive voltage. We tried changing out the temperature sensor and nothing changed, we then added a third power source of the same voltage to see if that would help at all, but unfortunately it did not.
Another problem we had was getting enough pressure on the pressure sensor to make the led light up. We noticed that we would need a much heavier object to land on the sensor than the small dominoes, so we made our own thinking it would be heavy enough. It did light up the led, but just barely and had to be positioned just right to fall on the sensor or it would hit the table or breadboard and not function.
Figure: Circuit Drawing
For this project, the diagram shows 2 separate circuits involved in completing the process: one involving just an LED, a force sensing resistor and a voltage source, and the other involving several components. The aforementioned complex circuit involves a temperature sensor, which will increase voltage through an opamp in order to trigger the relay. this allows current to flow to the 555 timer, which triggers it to start oscillating. the output of the timer is connected to the decimal counter so that it counts after the timer has been triggered. With the lowest and highest significance outputs connected to an AND gate, the output of this gate should be positive at 9 seconds. this positive output should then trigger the motor to turn. In our actual circuit, as seen above, this causes dominoes to fall, which should then theoretically trigger the pressure sensor in the other circuit to turn the LED on.