Charlieplexing is a multiplexing technique used to control N(N-1) loads with just N Microcontroller pins, it is extermly usefull for saving the microcontrollers pins. It was proposed by charlie allen in 1995.
In this project i'm going to implement Charlieplexing in order to control 6 Leds with just 3 pins.
So, for each pair of Led is configured in anti-parallel where each pair is placed exactly between two lines.