DELI COUNTER DISPLAY:
Project Overview-
For this deli counter display project we had to design a circuit that would count up to 80 and suspend once it reached 80. The circuit also had to be able to reset back to 0 at any time. We first had to design the counter in MultiSim and then incorporate a reset switch and ensure that the count was suspended at 80. We then transferred our circuit from multiSim to PLD mode and exported the circuit to our breadboard where the count was displayed.
For this deli counter display project we had to design a circuit that would count up to 80 and suspend once it reached 80. The circuit also had to be able to reset back to 0 at any time. We first had to design the counter in MultiSim and then incorporate a reset switch and ensure that the count was suspended at 80. We then transferred our circuit from multiSim to PLD mode and exported the circuit to our breadboard where the count was displayed.
MultiSim Circuit-
PLD Circuit-
The two different multisim design options work very differently. The PLD mode uses input and output pins along with a breadboard attached to the computer with a USB to send the working circuit from your screen into your breadboard. This signal travels onto the output connectors in the software and flows out of the corresponding output in the chip from your breadboard. Input connectors will send in certain things the circuit needs to run, like a clock. While output connectors transfer there output to a breadboard. The design mode only uses wires and the main components of a circuit on your computer screen to simulate a circuit.
Bill Of Materials-
- 74LS93N Chip
- Wires
- Breadboard w/ two seven segment displays
- MultiSim computer Software
- National Instrument Elvis Software
Conclusion-
- SSI circuits are small scale integration circuits using multiple flip flops to add. MSI circuits are medium scale integration circuits, its chip 74ls93 and it has 4 flip flops inside of it. MSI circuits simplify wiring and save space in circuit.
- I limited the MSI circuit to count up to 80 and suspend the count. If a reset button is hit the count will restart at 0
- A ripple effect is caused by the connection of the flip-flops. This could lead to the seven segment display flashing.
- The power runs through the flip flops causing the display for the ones place to count up to 9 and the display for the tens place to count up by 1 every time the other display reads a 10 until the tens place shows an 8 the count si then suspended by stopping the flip flops from counting or freezing their count. The count will reset at any time by clicking the reset switch, this triggers both displays to read 0 and the count to restart counting.