Arduino Pro Micro

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  • CPU = 8bit
  • Microcontroller = Atmega32u4
  • Digital I/O pins = 12
  • Oscillator = 16MHz
  • USB = 1
  • ADC = 4x 10-bit ADC inputs
  • PWM pins = 5
  • UART = 1
  • Reset button = no
  • ICSP header = no
  • Pin 13 LED = no
  • Software Used = Arduino IDE
  • Flash memory = 32KB
  • EEPROM = 1KB
  • SRAM  = 2.5KB
  • Size = 34mm x 18mm


  • Introduced by Sparkfun, Arduino Pro Micro is an Arduino compatible microcontroller board based on ATmega32u4.
  • It operates at a frequency of 16MHz and 5V.
  • It comes with a built-in micro USB port that helps you test and program the Arduino board with a computer.
  • This board comes with a flash memory of 32KB. And SRAM and EEPROM memories are 1KB and 2.5KB respectively. The flash memory is the memory where the Arduino Program (sketch) is stored. While EEPROM memory is used to store long-term information and SRAM memory is used to produce and manipulate variables when it starts running.
  • It comes with 4 analog pins, 12 digital I/O pins, and 5 PWM pins.
  • This board supports UART serial communication with two pins Rx and Tx. The former is the receive data line used to receive serial data while the latter is the transmission line used to transmit serial data.

This board can be used in the following projects.

  • Windows PC lock/unlock application
  • USB Trackpad
  • USB Joystick
  • Water Level Meter
  • Electric Bike
  • Creating a wireless keyboard
  • Automatic Pill Dispenser