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Pro Mini ATmega328 5V/16MHz 3.3V/8MHz $1.68
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Pro Micro ATmega32u4 5V/16MHz compatible with Arduino $3.36

Pro Mini ATmega328 5V/16MHz 3.3V/8MHz Round

$1.84

Pro Mini ATmega328 5V/16MHz 3.3V/8MHz development board with round button

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Description

1. 14 digital input / output port RX, TX, D2 ~ D13,
2. 8 analog inputs A0 ~ A7
3. 1 pair of TTL level serial port transceiver RX / TX
4. 6 PWM ports, D3, D5, D6, D9, D10, D11
5. Microcontroller: Atmega328P-AU
6. Support for external 3.3V ~ 11V DC power supply (using RAW and GND power port)
7. Dimensions: 33.3 x 18.0 (mm)

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