. It usually includes variants for both the 3.3V and 5V versions. How to Install the Library in EAGLE Clone or download the ZIP from GitHub and extract the Placement: Move the file into your EAGLE folder (typically found in Documents/EAGLE/libraries Activation: Open EAGLE and go to the Control Panel Expand the Right-click the SparkFun library and select . A green dot will appear, indicating it is active. Pro Micro Footprint Essentials
: Because the ATmega32U4 handles USB natively, your PCB design doesn't need extra space or traces for a separate USB-to-serial converter (unlike the Pro Mini). arduino pro micro eagle library