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Introduction:Emakefun UNO with pin header interface 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 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. Specification:Operating Voltage: V5Input Voltage (recommended): 7-12VInput Voltage (limits): 6-20VDigital IO Pins: 4 (of which 6 provide PWM output)Analog Input Pins: 6DC Current per IO Pin: 40mADC Current for 3.3V Pin: 50mAFlash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloaderSRAM: 2 KBEEPROM: 1 KBClock Speed: 16 MHzPackage included:1 x UNO R3 Development Board1 x USB Cable