Scanning at 80 frames per second he gets a nice, flickerless display. To make both the LED matrix circuit board and the control board, [Joekutz] carved out isolation paths in copper clad boards ...

Each of the seven segments is a single 0201 LED. Six I/O lines ... the operation of his tiny display modules, Sam also created the “6Pin 7Seg” development board featuring an ATtiny84 ...

Kwok Hoi-Sing, Founding Director of the State Key Laboratory of Advanced Displays ... circuit chips with various layouts. However, traditional mercury lamps and deep ultraviolet LED light sources ...