How to Multiplex an LED Grid...

Cliff Notes for this video: You light an LED by sending voltage through the anode and having the cathode as ground multiplexing can be done by grouping the anodes as either rows or columns and grouping cathodes the opposite way. you can light multiple LEDs by lighting one LED at a time very fast RGB LEDs are wired similarly... group common anodes.... then, group the red, green, and blue cathodes the opposite way if you still have too many pins, one way to shrink them is to multiplex the transistors.