Pro Micro ATmega32U4 Board – Micro USB

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 of the neat-o Arduino tricks that you're familiar with: 9 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 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 12VDC. If you're supplying unregulated power to the board, be sure to connect to the "RAW" pin on not VCC.

Features

- ATmega32U4 microcontroller with native USB interface

- 16 MHz operating frequency for stable real-time control

- Nine 10-bit ADC channels for analog signal acquisition

- Five PWM outputs for precise actuator control

- Compact 33 × 18 mm layout suitable for wearable devices

- UART, I2C, and SPI communication interfaces

- Onboard voltage regulator supporting 5–12 V DC input

- Full compatibility with Arduino IDE and standard libraries

Specifications

- Microcontroller: ATmega32U4

- Operating Voltage: 5 V DC

- Input Voltage (Recommended): 5–12 V DC

- Clock Frequency: 16 MHz

- Digital I/O Pins: 12 pins

- PWM Outputs: 5 pins

- ADC Channels: 9 channels (10-bit)

- USB Interface: Native USB (Micro USB)

- Communication: UART (Rx/Tx), I2C, SPI

- Dimensions: 33 × 18 mm

- Weight: 5 g

Links

- Arduino Pro Micro 3D Model

Arduino Pro Micro Case

- Schematic

- Eagle Files

- Board Dimensions

- Hookup Guide

- Graphical Datasheet

Datasheet (ATmega32U4)

- Firmware Note

- Arduino Addon Files

- Arduino Addon Files (IDE 1.5+)

GitHub (Design Files)

Toutrials