Arduino small form factor development boards arduino a000087 the arduino mini is a small microcontroller board originally based on the atmega168 but now supplied with the atmega328 the board is intended for use on breadboards and when space is at a premium it has 14x digital inputoutput pins of which 6 can be used as pwm outputs 8 analog inputs and a 16 mhz crystal oscillator it can be programmed with the usb serial adaptor or other usb or rs232 to ttl serial adaptor the new mini