A MAX7219 drives the display, and the brains are an ATmega8. It’s straightforward to send new values: a start byte, a CRC, the data to display, and an end byte.

The board has four LED arrays resulting in a display of 8×32 LEDs. The MAX7219 takes a 16-bit data word over a 10 MHz serial bus, so programming is pretty easy.

Learn how to create a simple heart rate monitor using an Arduino Pro Mini, PulseSensor, and OLED display. This beginner-friendly project is perfect for learning basic electronics, sensors, and ...

Arduino enthusiasts and makers in search of a new project to keep them busy, might be interested in this awesome split flap display that has been created by Instructables member JON-A-TRON.