Driving a Single Digit 7 Segment LED Display requires 8 of an Arduino's 20 or so I/O pins. Using a 74HC595 shift register only requires 3.
by Mel Lester Jr
Control RGB or RGBW single-wire addressable WS2811, WS2812 or SK6812 LED strands up to the limits of your power or Micro-Controller memory.
Project tutorial by Whimsy Makerspace
Arduino and easy to use photo occupancy sensors simplify control of the grade crossing signals and sound effects on a model railroad.
Project in progress by KevinMcArthur
cpm4nano - CP/M-compatible computer based on Arduino Nano.
Project in progress by FoxyLab
Ever wanted to play with the computer that sparked the personal computer age but don't have the cash to buy an Altair?
Build your own!
Project tutorial by David Hansel
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