Pro Micro ATmega32U4-AU 5V 16MHz Board with USB Type-C
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Prices updated: 13 Oct 2026
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About this product
A miniature Arduino-compatible board based on the ATmega32U4 microcontroller, measuring about 33 x 18 mm. It provides 12 digital I/O pins, 5 PWM channels and 4 analog inputs, with UART, SPI and I2C interfaces, and uses a Type-C USB connector. It suits compact projects, USB HID devices and embedded controllers.
Specifications
- Microcontroller
- ATmega32U4
- Operating voltage
- 5 V
- Clock speed
- 16 MHz
- Digital I/O pins
- 12
- PWM channels
- 5
- Analog input pins
- 4
- Flash memory
- 32 KB
- Size
- 33 x 17.7 mm
Frequently asked questions
How do I power the board from an external supply?
Connect an external supply of 6 to 12V to the RAW pin. Leave the USB connected only for programming or use the board's on-board regulator when powering from RAW.
Which board should I select in the Arduino IDE?
Most Pro Micro boards share the ATmega32U4 bootloader and are programmed by selecting Arduino Leonardo as the board in the Arduino IDE. Verify the port and bootloader behaviour on your specific clone.
