If you are designing a two-layer board, try to run your main data lines on the top layer and keep the bottom layer as a solid ground plane to reduce electromagnetic interference (EMI). 5. Critical Verification Checks
If you want to mount the Pro Micro completely flush against your carrier board without using plastic headers, you can modify the package in Eagle to use castellated holes or custom SMD pads. arduino pro micro eagle library
Verify the row spacing measures exactly 0.6 inches in Eagle's inspection tool. If you are designing a two-layer board, try
Ensure the library footprint matches your specific 3.3V or 5V hardware version, as pinouts can occasionally vary by manufacturer. Arduino Micro without Headers | Compact USB Dev Board Verify the row spacing measures exactly 0
Even with a great library, things can go wrong. Here are some common issues and solutions:
Once you've decided which library to use, here's how to get it up and running.
When you place the Pro Micro symbol into your EAGLE schematic, you will see a clean representation of its pins (RAW, VCC, GND, RST, and Digital/Analog I/O pins). Keep these critical wiring rules in mind: Powering Your Board