Deli Counter Display
Project Overview
For this project, we were to use our knowledge on asynchronous counters to build a circuit that could count 0-80 and pause automatically at 80.
Multisim Circuit
PLD Circuit
PLD Mode in multisim is a design setting where you can upload a circuit you created to a real chip on a breadboard. In order to do so, you need to assign Input pins to what your input will be (for example a switch) and output pins (for example inputs to a display or from a probe) to what your output would be. This will assign those components to pins you can choose on the chip so you can wire the chip accordingly. In doing this, you need to upload the circuit to the chip with use of a USB cable to the breadboard. This can be tricky, as for whatever reason there could be an error with the upload. You also need to pay attention when wiring the chip to the correct pins as all of them can seem a little hard to keep track of.
Bill of Materials
Final Project Conclusions
- Small Scale Integration uses less than 10 gates in the circuit, Medium Scale Integration uses 10-100 gates in a circuit
- One example of a limitation is that it can only count up. It also can only start at 0
- The ripple effect is a “flickering” of the display between changes of numbers or displays. It occurs due to signal delay
- When I start the simulation, the clock sends a signal through the MSI gates that count 0-9 over and over for the ones. Once it reaches 9, the output is wired into the SSI chips’ clock to chance the tens digit. We had to wire our circuit so when it finally reached 80, it would pause until we reset the circuit using the reset switch we wired in. We also wired a pause switch so we could stop the simulation at any given time
- Anthony’s circuit was definitely the most different out of all of my classmates. Honestly, I can’t even explain how he did it, it was so weird compared to what the rest of us did. He used transistors in his circuit, which I don’t know too much about
- One example of a limitation is that it can only count up. It also can only start at 0
- The ripple effect is a “flickering” of the display between changes of numbers or displays. It occurs due to signal delay
- When I start the simulation, the clock sends a signal through the MSI gates that count 0-9 over and over for the ones. Once it reaches 9, the output is wired into the SSI chips’ clock to chance the tens digit. We had to wire our circuit so when it finally reached 80, it would pause until we reset the circuit using the reset switch we wired in. We also wired a pause switch so we could stop the simulation at any given time
- Anthony’s circuit was definitely the most different out of all of my classmates. Honestly, I can’t even explain how he did it, it was so weird compared to what the rest of us did. He used transistors in his circuit, which I don’t know too much about