Arduino pro mini ATMEGA328P 5V/16MHz

The pin is distribution, but there is no welding.

Technical parameters:

1. 20 digital input / output ports RX, TX, D2~D13, A0~A5
2. 8 analog input port A0~A7
3. 1 to TTL level serial port RX/TX
4. 6 PWM ports, D3, D5, D6, D9, D10, D11
5. using Atmega328P-AU Atmel microcontroller
6. support for serial download
7. support external 3.8V~12V DC power supply
8. support 12V and the following battery power supply
9. clock frequency 16MHz
10. dimensions: 33.3*18.0 (mm)