Most of us are aware that charlieplexing can drive a large number of LEDs from a relatively small number of I/O pins, but [David Johnson-Davies] demonstrates adding another dimension to that method to ...

Driving more than a handful of LEDs from a microcontroller is often a feat that takes tedious wiring, tricking the processor, or a lot of extra external hardware. Charlieplexing is perhaps the most ...

The project is based on a PIC18F1320 microcontroller that creates a dry climate niche dweller like a cactus known as LEDactus which can produce a pleasant display while being immobile. A significant ...