Project Overview
This project represents the circuit to make a display you see at the deli counter. The counter must count up to 80 and pause, and can be reset at any time using 1 switch.
Bill of Meterials
4 d-flip flops, 4 JK flip flops, 2 hex displays, 1 clock, 2 four imput and gates, 1 XOR chip, 1 clock, probes, and wires, and digital constants.
Conclusion
The differences between SSI and MSI are that an SSI circuit uses flip flops to achieve the goal, MSI uses the 74ls93 chip and does most of the work. The 74ls93 chip has limitations such as that it can only count up, you can load any number but it will only go up the digits. The meaning of the ripple effect is a small amount of delay in the flip flops that causes a random number to be displayed on the display for a short period of time. When i start the simulation, the clock starts and goes into an and gate that is connect to the tens circuit that detects an 8 and the and gate goes into the first jk flip flop and gives an out put of 0 then the not Q goes into the next flip flop and gives an out put 1 and then into the next flip flop with an output of 0 and then the last flip flop with and out put of 1. The order of the numbers is displaying a 10 but is backward because the Most significant bit is actually the last flip flop. This is then carried to the display and carried to the tens circuit into the first d flip flop, this will be the same process as the first one but the numbers will detect a nine instead of a 10, this is then displayed on a seperate hex display. To reset it there is one switch that resets both displays, the switch connects to A XOR gate on each circuit that connects to the resets to the flip flops.