开发板教程：内置示例（AnalogInOutSerial）_电机控制

可变电阻控制输出PWM信号，控制电机转速。
更详细说明

可调电阻用法来自示例：AnalogReadSerial
接线：D9输出控制信号，接到开发板DC1插座；经板载的ULN2003A集成块放大后，由DC1的输出插座输出，位置就在信号输入口的右侧，电机输出两条线为一组，不用区别正负极，它只影响电机转动的方向。

链接：https://pan.baidu.com/s/1cXCxWAnwRneMOHCVcKkZWw
提取码：m99l
视频链接

const int analogInPin = A0;  // Analog input pin that the potentiometer is attached to

const int analogOutPin = 9; // Analog output pin that the LED is attached to



int sensorValue = 0;        // value read from the pot

int outputValue = 0;        // value output to the PWM (analog out)



void setup() {

 // initialize serial communications at 9600 bps:

 Serial.begin(9600);

}



void loop() {

 // read the analog in value:

 sensorValue = analogRead(analogInPin);

 // map it to the range of the analog out:

 outputValue = map(sensorValue, 0, 1023, 0, 255);

 // change the analog out value:

 analogWrite(analogOutPin, outputValue);



 // print the results to the serial monitor:

 Serial.print("sensor = ");

 Serial.print(sensorValue);

 Serial.print("\t output = ");

 Serial.println(outputValue);



 // wait 2 milliseconds before the next loop

 // for the analog-to-digital converter to settle

 // after the last reading:

 delay(2);

}