Type-C Pro Micro ATmega32U4 — 5V/16MHz Arduino Leonardo Compatible
The Pro Micro ATmega32U4 is the smallest Arduino board with native USB HID capability, fitting the ATmega32U4 — the same chip as the Arduino Leonardo — in an 18 x 33mm package with a USB-C connector. The ATmega32U4’s hardware USB controller allows the board to appear as a keyboard, mouse, MIDI device, or custom USB HID without any additional chips. It is the standard choice for custom mechanical keyboard firmware (QMK) and USB joystick builds.
- ATmega32U4 at 16MHz — native USB HID controller
- USB-C connector — modern, reversible
- 18 digital I/O pins — 5 with PWM
- 9 analogue inputs — 10-bit ADC
- 5V operating voltage
- Appears as keyboard, mouse, MIDI, or joystick — no additional driver
| Specification | Value |
|---|---|
| MCU | ATmega32U4 at 16MHz |
| Flash | 32KB (4KB bootloader) |
| SRAM | 2.5KB |
| Digital I/O | 18 (5 PWM) |
| Analogue inputs | 9 (10-bit) |
| USB | USB-C, native HID |
| Operating voltage | 5V |
Best for
QMK mechanical keyboard firmware, USB MIDI controllers, USB HID gamepad builds, macro keypads, USB joystick adapters, and any project needing a compact Leonardo-compatible board with USB-C and native keyboard/mouse emulation.
Why Kunkune
Shipped from UK stock. 60-day returns, no minimum order. Same-day dispatch before 2pm.
Buying in bulk? For orders of 10+ units, contact us for trade pricing.
