# UNO R3 Compatible Development Board

- Link: https://www.stem26.com/product/uno-r3-board/
- Published: 2026-11-05T18:55:42+00:00
- Author: diy

Our UNO R3 compatible board is where most makers start. It runs the free Arduino
IDE, plugs in over USB and works with thousands of tutorials and shields.

 * ATmega328P microcontroller, 16 MHz
 * 14 digital I/O pins (6 PWM), 6 analog inputs
 * USB powered or 7–12 V barrel jack
 * USB cable included