The input circuit is a simple keypad matrix. To read each button push, the Arduino brings one keypad input line high and checks the voltage of the four output lines in order.

[Alex] needed a project for his microcomputer circuits class ... [Alex] planned to use an Arduino to control this display, but it doesn’t have enough outputs on its own to control all of ...

Our project is infact an Arduino with Serially Interfaced MAX7219 Operates an 8X8 LED Matrix to display a heart pattern. The MAX7219 IC is a serial input/output common-cathode display driver that ...

If you searching for an LED matrix ... circuit board has everything you need to run a display – just plug it in! Using and customizing the display is easy, with a specially written Arduino ...

Adafruit has this week announced the arrival of the new Arduino RGB Matrix Shield which is now available to purchase priced at $5.95. Any of your projects that use a Arduino-compatible board ...