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EMX-00001-A

(Last updated) Jun 20, 2026

Arduino Uno R3

ATmega328P development board

The Arduino Uno R3 is a microcontroller development board based on the ATmega328P, designed for building interactive electronics projects. It features 14 digital I/O pins, 6 analog inputs, a 16 MHz clock, USB interface, and operates at 5V. It is widely used in education, prototyping, robotics, and embedded system development.
Board Type Uno
With Cable Yes
Operating Voltage 5 V
Input Voltage Range 6 – 20 V
Analog I/O Pins 6
Digital I/O Pins 14 (6 × PWM)
DC Current per I/O Pin 40 mA
Clock Speed 16 MHz
SRAM 2 KB
EEPROM 1 KB
Flash Memory 32 KB
Dimensions (L × W × H) 75 × 54 × 12 mm
Weight 28 g (without cable), 54 g (with cable)