Logic Based Digital Queuing System Circuit (74192 counter)

Another common logic circuit project is an electronic queuing system.

This is a simplified design using a up/down counter IC, 74192. It is a versatile logic IC that has a separate pins for up and down count. Also, an RS latch is used for the indicator of the counter number.

Here is the schematic/circuit design.

Please note:

1. Check the V+ and GND of the IC used. They are hidden on the schematic.

2. The seven-segment display needs current limiting resistor.

3. Switch debouncer circuit might be need if switch bounces are present. A reference on switch debouncer(Click Here).


Simulation video using Proteus Isis 7(Download proteus here):

Logic Based Digital Queuing System (74192 counter)