Write SPIN code for TM1637 and TM1638 (Part I)

big-banging seven-segment driver chips

Apollo guidance computer DSKY display unit with seven-segment digits

Seven-segment digit display used to be ubiquitous. Nowadays they only appear on digital clocks, microwave oven or washing machine control panels, among others.

They can also be useful for your hobby electronics projects, to display voltage, current or temperate readings, or even to make your own…