There are so many nice hacks in [Joekutz]’s retro LED ... Arduino pins. Scanning at 80 frames per second he gets a nice, flickerless display. To make both the LED matrix circuit board and the ...

There was a point in time, excruciatingly brief, in which desktop computers often had a large “TURBO” button on their ... the state of the Turbo LED with an Arduino Pro Mini.