The Arduino Uno R3 is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started. The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip.
Features
Added SDA and SCL pins for TWI communication placed near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board and the second one is a not connected pin, that is reserved for future purposes.
stronger RESET circuit.
Technical Specification
Microcontroller: ATmega328P
Operating Voltage: 5V
Recommended Input Voltage: 7 – 12V
Input Voltage Range: 6 – 20V
Digital I/O pins: 14
PWM pins: 6
Analog Input Pins: 6
DC Current per I/O Pin: 20mA
DC Current for 3.3V Pin: 50mA
Flash Memory: 32KB
SRAM: 2KB
EEPPROM: 1KB
Clock Speed: 16MHz
Led Built-In: 13
Application
Robotics
Home Automation
Embedded Systems etc
Additional Information
Length: 68.6mm
Width: 53.4mm
Weight: 25g