• The Pro Micro is similar to the Pro Mini except with an ATmega32U4 on board.
  • The USB transceiver inside the 32U4 allows us to add USB connectivity on-board and do away with bulky external USB interface.
  • This tiny little board does all work for Arduino tricks that you’re familiar with: 4 channels of 10-bit ADC, 5 PWM pins, 12 DIOs as well as hardware serial connections Rx and Tx. Running at 16MHz and 5V, this board will remind you a lot of your other favorite for Arduino-compatible boards but this little guy can go just about anywhere.
  • There is a voltage regulator on board so it can accept voltage up to 6V (Blue board)
  • If you’re supplying unregulated power to the board, be sure to connect to the “RAW” pin on not VCC.
  • This latest revision corrects the silk error from the last version of the board so that pin 14 is correctly labeled.
  • We’ve also added a PTC fuse and diode protection to the power circuit and corrected the RX and TX LED circuit.
ATMega 32U4 running at 5V/16MHz
Supported under for Arduino IDE v1.0.1
On-Board MINI USB connector for programming
4 * 10-bit ADC pins
12 * Digital I/Os (5 are PWM capable)
Rx and Tx Hardware Serial Connections


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