The A-Star 32U4 Micro Programmable Module is a tiny programmable module featuring Atmel’s ATmega32U4 microcontroller. It packs a Micro-USB interface and 18 digital input/output pins of which 7 can be used as PWM outputs and 8 as analog inputs onto a board measuring only 1″ × 0.6″ and preloaded with an Arduino-compatible bootloader.