miniMO PCB

PCB-based module, 4x4x3 cm in size, running on an ATTiny85 from the Atmel TinyAVR family.

Power comes either from a CR2032 battery placed underneath, or from an external source up to 5.5V.

The modules have a programming header that fits over the matching pins of an Arduino for plug-and-program operation.

miniMO attached to an Arduino. The extra wire powers the unit from the Arduino for battery-free operation.

miniMO has four ports: two identical outputs, an input that modulates the potentiometer, and a port that doubles as an analog input or a gate output depending on the program.

miniMO is both Open source and Open Hardware. I’ve written a step-by-step guide to program it, and made available all its schematics, programs, and a wealth of 3D printed parts and accessories.