Deli Counter Project
In this project, the purpose of The Deli Counter Display is to count from 1 to 80, when pressing a button, in order to keep track of the next customer. With this design, the one's place of the counter must use asynchronous counter 74LS93 and the ten's place must use a D Flip Flop. In the design, I made a "Next" and "Reset" switch which were used to go to the next number and reset the counter to zero.
MultiSim Circuit
PLD Circuit
The Difference between the normal MultiSim and the PLD Circuits is that the ground and power are replaced by pins. The pins are linked with a spot on the chip that can be transferred and programmed from MultiSim to the board. This makes it so you don't have to create a complex circuit with a lot of wires and chips but the output will be the same.
Conclusion
SSI is a small scale integration and MSI is a medium scale integration. The difference between them is that SSI are the chips that are wired together. MSI is a large chip that contains SSI chips inside of it. MSI chips only start at zero and can only count up. The Ripple Effect is the delay that occurs from chips that use the same clock, the results is a slight flicker in the display.
At the rising edge of the clock, the MSI chip would count the ones place. When the ones place got to a 9 the tens place would count up. This will go on until the circuit displays 80 then the count will stop. It pauses because of an inverter attached to Q on the MSB. The way I designed my circuit, hitting the reset switch would set the displays to 0, resetting the count.
For the actual circuit, however. Instead of having a button I had to toggle a switch to reset it.
At the rising edge of the clock, the MSI chip would count the ones place. When the ones place got to a 9 the tens place would count up. This will go on until the circuit displays 80 then the count will stop. It pauses because of an inverter attached to Q on the MSB. The way I designed my circuit, hitting the reset switch would set the displays to 0, resetting the count.
For the actual circuit, however. Instead of having a button I had to toggle a switch to reset it.