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.
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.