The Arduino Duemilanove ("2009") is a microcontroller board based on the ATmega328. It has 14 digital inputoutput pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHzcrystal 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 a AC-to-DC adapter or battery to get started.
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