The Pro Micro is similar to the Pro Mini, except for the fact that it utilises the ATMega32U4. Additionally, there is an on-board USB transceiver inside the 32U4, which removes the need for a bulky external USB interface. There is also a voltage regulator on-board which means it can accept up to 12V DC. Please bear in mind that if supplying unregulated power, you need to connect to “RAW”, not “VCC”.

Dimensions: 1.3 x 0.7"

Features:

• ATMega 32U4 running at 5V/16MHz
• Supported under Arduino IDE v1.0.1
• On-Board micro-USB connector for programming
• 4 x 10-bit ADC pins
• 12 x Digital I/Os (5 are PWM capable)
• Rx and Tx Hardware Serial Connections

Further information including support files, schematic and an example sketch is available on our support forum here.