Arduino Pro Micro Eagle Library

Creating a custom Eagle library (.lbr) file for the Arduino Pro Micro can be done in two ways: creating the file manually using the XML code below, or following the design steps to build it from scratch in the Eagle editor.

4. Creating a Pro Micro Library from Scratch (Optional)

If you prefer to build your own library (good for learning or custom pin mapping), follow these steps: arduino pro micro eagle library

If you are soldering the board directly, use standard 0.1" male headers. If you want it removable, use female socket headers in your design. Arduino Docs Key Pins for Schematic Design Creating a custom Eagle library (

This write-up covers:

6.1. Schematic Placement

• Add the Pro Micro device to your schematic.
• Connect your external circuitry to its pins (e.g., buttons to D4, LEDs to D9).
• Do not duplicate the ATmega32U4’s support components (crystal, USB port, reset circuit) – they are already on the Pro Micro board.