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EEVblog #1141 - Padauk 3 cent micro - programmer

Using the Padauk programmer to program the 8 pin so PMS154C micro and flash a led on a breadboard. Support the EEVblog ...
Hackaday

Bubbles, Belts, And Bulbs: How The Scantron Works

Many of us remember back in our school days taking tests and filling out answers on a Scantron sheet, those long rows of A, B ...