Updated Jan 15, 2026 GitHub
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Open-source hardware · Project overview

SparkFun Pro Micro

The classic ATmega32U4 Pro Micro, with openly published Eagle PCB design files.

AVRUSBArduinoOpen hardware
Default branchmain
LicenseCC-BY-SA-3.0
Current revision
UpdatedJan 15, 2026
README

SparkFun Pro Micro

The classic ATmega32U4 Pro Micro, with openly published Eagle PCB design files.

Project essentials

What this board does

Understand the board’s purpose and major capabilities at a glance.

  • ATmega32U4 native USB
  • Pro Mini-sized
  • Long-running OSHW design
Release status

Prototype readiness

See whether the design is electrically and mechanically ready.

✓
Electrical checks passDRC, ERC and interface audit
Repository map

Important files

Open the primary design sources, project setup, and release evidence.