Beginning
The purpose of the copy jam project was to create a working prototype that would recreate the situation of a copy machine with a paper jam. After finding our expression we then used truth tables, k-mapping, and boolean algebra to find our simplified expression. After finding our simplified expression we were able to recreate the the expression on multi-sim using AOI logic circuits and a 74LS74 chip. Our final step was to create the circuit by bread boarding and connecting the buzzer and light sensor to the board and testing if our final design worked.
Circuits
Because this circuit used Flip-Flop circuits it was more difficult then the others. It was difficult for me personally to understand the external wiring diagram, due to the pins being in a different order then normal. However after using the multi-sim diagram josh created it was easier to understand and recreate.
Explanation of parts and functions
- Resistors: The resistors were used to allow power in the input even when the light was turned off, it limited the current from power to the circuit.
- Combination logic circuit: This told the circuit when the buzzer and LED should activate when the inputs were on or off.
- Flip-Flop: This was used as an event detector allowing us to turn off the alarm when it activated
- The LED: LED will turn off but the alarm will continue to make noise due to the flip flop providing an output of 1 until the switch is flipped cutting the signal.
Conclusion
This project was different from the others because we had to implement a flip flop chip into our circuit. We would also have to create a fishertechnik kit as our testing machine. The machine was the easy part of this project, the only problem we ran into when creating the machine was not having enough parts for the wires to connect to and the machine not being a stable structure. After creating our machine we had to connect it to our board and then to our flip flop chip. This was the most difficult part of the project because we had to learn the new pin setup of the chip and properly wire it to our mechanism as a power source. We also learned how to connect and use a buzzer alarm, and using a J/K flip flop chip. Learning these new components allowed us to complete our circuit.