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ATMEGA328P Improved Pro Microcontroller Circuit Board (Works with Official Arduino Boards)
14 Digital input / output RX£¬ TX£¬ D2~D13 - 8 analog inputs AO~A7£¬ 2 x TTL level serial port RX/TX - 6 PWM ports: D3£¬ D5£¬ D6£¬ D9£¬ D10£¬ D11; Adopt Atmel Atmega328P-AU singlechip - Supports serial download - Supports external 3.3V~12V DC power supply - Supports 9V battery supply - Clock frequency: 16MHz - Comes with 3 x Pins