Pro Micro ATmega32U4

5 V / 16 MHz USB-C Arduino-Compatible Development Board

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24H

From the UK

Fast UK Dispatch

Orders are usually dispatched within 24 hours of ordering — often sooner.

PACKED & SENT FROM THE UK

Features at a Glance

Compact AVR development with native USB built directly into the microcontroller.

Microcontroller icon

ATmega32U4

8-bit AVR microcontroller with native USB

16 MHz

5 V / 16 MHz

The standard high-speed Pro Micro version

USB Type-C icon

USB Type-C

Power, programming and native USB data

USB development icon

Native USB HID

Ideal for keyboard, mouse, MIDI and USB control projects

Input and output icon

12 Digital I/O

5 PWM-capable outputs • 9 ADC channels

Compact board icon

Compact Pro Micro

Small breadboard-friendly form factor with UART, I²C and SPI

Small Board.
Native USB Built In.

The Pro Micro is a compact development board built around the ATmega32U4, running at 5V and 16 MHz. Unlike many AVR boards, the ATmega32U4 includes its USB controller directly on the chip, so no separate USB-to-serial converter is required.

That native USB capability makes it particularly useful for custom keyboards, macro pads, button boxes, USB control devices, sensors, robotics and compact embedded projects.

Ideal For

Especially useful where compact size and direct USB functionality matter.

Custom keyboard icon

Custom Keyboards

Control interface icon

Macro Pads & Button Boxes

USB device icon

USB HID Devices

Sensor icon

Sensors & Controls

Robotics icon

Robotics

Prototyping icon

Prototyping

Technical Specifications

Key details for the 5 V / 16 MHz ATmega32U4 Pro Micro.

Microcontroller
ATmega32U4, 8-bit AVR
Operating Voltage
5 V
Clock Speed
16 MHz
Flash Memory
32 KB total; available application space depends on the installed bootloader
SRAM
2.5 KB
EEPROM
1 KB
USB
USB Type-C for power, programming and data; native USB controller built into the ATmega32U4
Digital I/O
12 digital I/O pins, 5 of which are PWM-capable
Analog Inputs
9 ADC channels, 10-bit resolution
PWM
5 PWM-capable pins
Hardware Interfaces
UART, I²C and SPI
Native USB Uses
USB CDC serial plus firmware-defined HID devices such as keyboards and mice
Development
Arduino IDE and PlatformIO compatible
Form Factor
Pro Micro-compatible compact footprint

What You Receive

✓ 1 × Pro Micro ATmega32U4 5 V / 16 MHz USB-C development board
✓ 2 × loose male header pin strips

The header strips are supplied loose and unsoldered, allowing you to fit them in the orientation that best suits your project. USB-C cable and other accessories are not included unless shown and stated elsewhere in the listing.

Good to Know

5 V version: select a Pro Micro 5 V / 16 MHz (ATmega32U4) board profile rather than the 3.3V / 8MHz version.
Use a data-capable USB-C cable: a charge-only cable can power the board but cannot upload sketches.
Native USB: the ATmega32U4 can be programmed to appear as a keyboard, mouse or other USB HID device.
No built-in wireless: this AVR board does not include Wi-Fi or Bluetooth.

New to the Pro Micro? If you are unsure about board selection or getting started, feel free to message us through eBay.