The Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, 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 a AC-to-DC adapter or battery to get started.
ATmega328 (Surface Mount Package)
Input Voltage (recommended)
Input Voltage (limits)
Digital I/O Pins
14 (of which 6 provide PWM output)
DC Current per I/O Pin
DC Current for 3.3V Pin
32 KB (ATmega328) of which 0.5 KB used by bootloader
For details, visit Arduino Uno R3 page.
1 Visit Arduino Official Site.
2 Learn Arduino - Getting Started.
3 Download Arduino Software, it is free, open source, and available for Windows, Mac OS, and Linux.
4 The official Arduino multi-lingual forum is the place to start with questions ...