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Pro Mini Upgraded Version 5V 16MHz ATMEGA328P Module - Black
14 Digital input/output ports RX£¬ TX D13£¬ D2 ~~ of£¬ or 8 analog input port A0 to A7 The TTL level serial transceiver port RX/TX 6 PWM ports£¬ D3£¬ D5 £¬ D6£¬ D9£¬ D10£¬ D11 Using Atmel Atmega168P microcontroller supports serial download Support for external 5v~ 12V DC power supply Support 9V battery-powered Clock frequency: 16MHz Dimensions:33.3 x 18.0 (mm)