This PCB takes a serial stream of 8 input bits to display on a common-cathode 7-segment display. Current-limiting resistors are included on the board.
Pinout
![](https://i0.wp.com/doctor-pasquale.com/wp-content/uploads/2022/12/SPI-display-pinout.png?resize=650%2C358&ssl=1)
Hardware
This PCB uses the 74HC595 SIPO register, 220 ohm current-limiting resistors, and a common-cathode 7-segment display.
Schematic
Click for a larger version.
![](https://i0.wp.com/doctor-pasquale.com/wp-content/uploads/2022/12/SPI-display-schematic.png?resize=650%2C279&ssl=1)