shift

521H 7 segment display is available in common cathode and common anode versions.
521h
Pins 3 and 8 are treated as connected together - the common pins.

Segment letters are enumerated clockwise from the top, G is the middle segment.
The display colour is red.
One current (active) project uses shift registers, 74HC595, to minimise the number of IO pins used on the micro-controller.

This is a story about creating a demo board for working with shift registers.

1. first create the circuit board
2. demo on Arduino platform as a single, 8 bit shift register
3. expand demo board to use multiple SR, iterative with software development
4. when hardware is operational port the software to STM8 platform and Cypress board

Notes about creating the circuit board for the shift reg (demo)