Pro

The Arduino Pro Mini is a compact, low-power microcontroller board based on the ATmega328P chip. It is designed for projects that require a smaller form factor or a low power consumption, as it only has 14 digital input/output pins, 8 analog inputs, a 16 MHz quartz crystal, and a mini USB connection for programming. This is a clone of the original Arduino Pro Mini, which means that it is a less expensive alternative that still has the same basic functionality as the original. Note that this board does not come with a USB connection, so you will need an external USB to serial converter to program it.