Here is a simple, yet useful circuit of an Arduino 4-digit 7-segment LED display unit. The module used here is a self-contained, compact common-cathode module containing four 7-segment LED numeric ...

Connect an external 5VDC (1A) to VCC of 8×8 LED Matrix; Connect external 5VDC supply’s GND, to the GND of 8×8 LED Matrix Module; Note that the 8x8LED Matrix Module should be common-grounded with ...

Looking to use his Arduino when on-the-go, [Oleg] has been working on a way to use the Android ADK terminal emulator with the Arduino. The Android side uses ADK features along with a custom applica… ...

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 ...