The Arduino then controls the state of the LED using the active high enable line from the column multiplexer chip. [Alex] wanted more than just a static image to show off on his new display, so he ...

Most of us have an 8x8 LED matrix from one of our Arduino kits. What can we do with them? This module investigates how to use these interesting devices. Along the way, we describe a fun electronics ...

A phototransistor is wired to an Arduino Uno and positioned above a 32×32 RGB LED matrix. ... and then the program turns on the LEDs that the sensor saw during the scan.