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This board is a microcontroller card based on the ATmega32u4 (Arduino® compatible Leonardo). It has 20 digital input / output pins (7 of which can be used as PWM outputs and 12 as analogueue inputs), a 16 MHz crystal oscillator, a micro USB connection, a power socket, an ICSP header and a reset button. It contains everything was needed to support the microcontroller; connect it to a computer with a USB cable or an AC-to-DC adapter or battery to start.This text is machine translated.