This PCB takes 8-bits of anode inputs (abcdefg
and dp
) and 4-bits of cathode inputs (C1
, C2
, C3
, C4
) to display values on one of four 7-segment displays. The 7-segment displays are multiplexed: they share common anode pins and are individually selected through their cathode pins to display data. Current-limiting resistors are included on the board.
Pinout
![](https://i0.wp.com/doctor-pasquale.com/wp-content/uploads/2022/12/MUX-display-pinout.png?resize=564%2C353&ssl=1)
Hardware
This PCB uses a multiplexed 7-segment display and 220 ohm current-limiting resistors.
Schematic
Click for a larger version.
![](https://i0.wp.com/doctor-pasquale.com/wp-content/uploads/2022/12/MUX-display-schematic.png?resize=650%2C389&ssl=1)