Metro Mini 328
ATmega328 microcontroller with Optiboot (UNO) Bootloader
USB Programming and debugging via the well-supported genuine FTDI FT231X
Input voltage (Vin): 6-16V (a 9VDC power supply is recommended)
5V logic with 3.3V compatible inputs, can be converted to 3.3V logic operation
20 Digital I/O Pins: 6 are also PWM outputs and 6 are also Analog Inputs
32KB Flash Memory - 0.5K for bootloader, 31.5KB available after bootloading
16MHz Clock Speed
Adafruit Black PCB with gold plate on pads
18mm x 44mm x 4mm / 0.7" x 1.7" x 0.2"
Derivative of "Arduino UNO R3 Reference design"
Open source hardware files on github!