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.
