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Arduino Compatible Pro Micro (ATMega 32U4) - 3.3V/8MHz

DISCONTINUED - The smallest Arduino-Compatible board yet! Great for rapid prototyping with an ATmega32U4 board for increased USB connectivity and low power consumption.

Availability: Out of stock

Code 1+
incl VAT

Please note: this product has been discontinued and is present for reference only. It is not possible to buy this product.

The smallest Arduino-Compatible board yet! An even smaller version of the Pro Mini, but with an ATmega32U4 (as opposed to the ATmega328 on the Pro Mini). The Pro Micro features an on board micro USB connector for instant USB connectivity that also doubles as a power supply! Ideal for small, lightweight projects that require rapid prototyping or in large volumes.

The Pro Micro (rated at 3.3V/8MHz) contains an improved ATmega32U4 chip. The 3.3V version of the Pro Micro has the advantage of ease of use with compatible 3.3V sensors combined with lower power consumption.

The Arduino compatible board includes 4 analogue pins with 10-bit ADC (Analogue Digital Conversion) for use with analogue 3.3V sensors, 5 PWM (Pulse Width Modulation) pins good for dimming LED's, 12 Digital I/O pins for general use and Rx and Tx hardware serial connections. It can even be used with the official Arduino iPhone App for further configurations.

This Pro Micro contains an on board USB transceiver, so it doesn't require any external FTDI boards to be able to connect it to a computer.


  • Smallest Arduino-Compatible board yet!
  • On-board micro-USB connector for power supply and direct programming with a computer or the Arduino IDE software iPhone app.
  • 3.3V/8MHz ATmega32U4 chip.
  • Supports auto-reset.
  • 5V regulator.
  • Max 150mA output.
  • Over current protected.
  • DC input 5V up to 12V.
  • On board Power and Status LEDs.
  • Analog Pins: 8.
  • Digital I/Os: 14.


  • The Pro Micro has an onbaord regulator that can handle up to 12VDC and regulate it down to the board's operating voltage of 3.3V. If you are doing that you need to connect the unregulated voltage to the 'Raw' pin and not the 'VCC' pin.


  • 1 x Pro Micro - 3.3V/8MHz.


  • PCB Length: 33mm.
  • PCB Width: 18mm.
  • PCB Height: 0.8mm.


SparkFun Stock Code:

  • DEV-12587.

Please note: this product has been discontinued and is present for reference only. It is not possible to buy this product.

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