Above you can see [Hans’] creation next to the official Arduino USB-to-serial programmer. He used the same connection scheme, but went with an edge connector for the USB instead of using a mini ...

The brains of the operation is an Arduino Pro Mini. It controls two MAX7219s that drive the 42 LEDs plus the 7-segment display.

Electrical engineer and electronics hobbyist Etienne at Etimou based in Clermont-Ferrand, France has created a new open source development board in the form of the Arduino RF Pro Mini. The creator of ...