Project Overview
The objective of this project was to build a deli counter that counts from 0-80. The counter stops when the number 80 is displayed, or when the reset switch is activated.
MultiSim Circuit
PLD Circuit
PLD mode is different than design mode because you can upload your circuit with a chip, and there are pins. Also, there are no digital displays, and some of the components are labeled differently. Pins have different numbers, and when you upload a circuit, you have to make sure you connect the chips the same way you do on the program. The clock is always connected to pin 14. I also connected a pin to the reset switch, which was required. Input pins connect to switches or input components, and output pins connect to LEDs or output components.
Conclusion
- Small Scale Integration ranges from 0-10 chips, while Medium Scale Integration ranges from 10-100 chips
- The MSI circuit we created only counts up
- The "ripple effect" is created by asynchronous flip flops when only the first flip flop is connected to the clock, and the other flip flops wait to detect each other
- When the simulation is started, a signal goes through the clock input of the '93 chip, and it begins counting up from 0. I set the input equal to zero, and it counts to 9 because the output is set to 10, and it counts one below. Once the 93' chip counts to 9, it resets to 0 and begins counting again. Meanwhile, when the NAND gate detects a 10, it triggers the '47 JK Flip Flops, and they display a 1. This process keeps repeating, and the JK Flip Flops count up until the number 80 is detected, which is when the circuit stops. The circuit can be reset at any time by activating the reset switch, which is connected to both flip flops.
- I finished my project late, so I didn't compare my circuit to any classmates.