The Uno R3 Board is one of the most widely used and accepted development boards for prototyping, boasting a large, global user community. It is based on the Atmega328p-AU microcontroller from Atmel’s AVR family, providing robust features for both beginners and experienced users. This board is designed for entry-level development but offers powerful capabilities, making it suitable for a wide range of applications.
 
Key Features:
Microcontroller: ATmega328p-AU (8-bit microcontroller)
Operating Voltage: 5V
Input Voltage: 6–20V
Digital I/O Pins: 14 (6 with PWM output)
Analog I/O Pins: 6
PWM Output Pins: 6
Clock Speed: 16 MHz
Flash Memory: 32 KB (with 0.5 KB used by bootloader)
SRAM: 2 KB
EEPROM: 1 KB
DC Current per I/O Pin: 40 mA
DC Current for 3.3V Pin: 50 mA
Enhanced Pinout:
SDA and SCL pins added near the AREF pin for I2C communication.
IOREF pin near the RESET pin allows shields to adapt to either 5V or 3.3V, ensuring future compatibility with different Arduino boards (e.g., Arduino Due).
Stronger RESET circuit for improved reliability.
Power Supply Options: DC Jack or USB (cable not included)
Dimensions (L x W x H): 75 x 54 x 12 mm
Weight: 28 g (without cable)
Package Includes:
1 x Uno R3 Board without Cable (Compatible with Arduino)