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Arduino Uno R3 Pinout Diagram

Arduino Uno R3 Pinout & Specifications

Welcome to the definitive pinout guide for the Arduino Uno R3.

The classic ATmega328P development board. The standard for beginners.

(High-resolution pinout diagram coming soon!)

Key Specifications

Important Wiring Notes

Need to learn how to wire sensors to this board? Check out our Academy for step-by-step tutorials!