/*
 Controlling a servo position using a potentiometer (variable resistor)
 by Michal Rinott <http://people.interaction-ivrea.it/m.rinott>

 modified on 8 Nov 2013
 by Scott Fitzgerald
 http://www.arduino.cc/en/Tutorial/Knob
*/

#include <Servo.h>

Servo myservo;  // create servo object to control a servo

int potpin = 0;  // analog pin used to connect the potentiometer  连接电位器的模拟引脚
int val;    // variable to read the value from the analog pin   变量从模拟引脚读取数值

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object  将9号引脚上的伺服附加到伺服对象
}

void loop() {
  val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023)
  val = map(val, 0, 1023, 0, 180);     // scale it to use it with the servo (value between 0 and 180)
  myservo.write(val);                  // sets the servo position according to the scaled value
  delay(15);                           // waits for the servo to get there
}
//读取电位计的值（从0到1023）
//将其缩放以与伺服系统一起使用（数值在0到180）
//根据缩放值设置伺服位置
//等待伺服系统到达那里