The Arduino Uno is a micro controller board which is based on the ATmega328. Arduino Uno have 14 digital input or output pins(where 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 have everything needed to support the microcontroller, you need to 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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