描述
Technical parameters:
1. 20 digital input/output port RX and TX, D2 ~ D13, A0 ~ A5
2. 8 analog input port A0 ~ A7
3. 1 to the TTL level a serial port to send and receive port RX/TX
4. 6 PWM port, D3, D5, D6, D9, D10, D11
5. Using Atmel Atmega168P-AU microcontroller
6. Support serial download and ISP download
7. Support external 3.3V ~ 12V dc power supply
8. Support the Li-ion polymer batteries while direct connect Vcc Pin
9. 16 MHZ clock frequency
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