Arduino UNO R3

The Arduino Uno R3 is a microcontroller board based on a removable, dual-inline-package (DIP) ATmega328 AVR microcontroller. It has 20 digital input/output pins (of which 6 can be used as PWM outputs and 6 can be used as analog inputs). Programs can be loaded on to it from the easy-to-use Arduino computer program. The Arduino has an extensive support community, which makes it a very easy way to get started working with embedded electronics. The R3 is the third, and latest, revision of the Arduino Uno.

   Operating Voltage 5V

   Input Voltage (recommended) 7-12V

   Input Voltage (limits) 6-20V

   Digital I/O Pins 14 (of which 6 provide PWM output)

   Analog Input Pins 6

   DC Current per I/O Pin 40 mA

   DC Current for 3.3V Pin 50 mA

   Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader

   SRAM 2 KB (ATmega328)

   EEPROM 1 KB (ATmega328)

   Clock Speed 16 MHz

   Length 68.6 mm

   Width 53.4 mm