Arduino库教程-Servo-Sweep

Sweep

• 将一个RC伺服电机的轴扫过180度。

• 这个例子利用了Arduino伺服库。

硬件要求

• Arduino or Genuino Board
• 伺服电机
• 连接线

电路

• 伺服电机有三根线：电源、接地和信号。电源线通常是红色的，应该连接到Arduino或genuino板的5V引脚上。接地线通常为黑色或棕色，应连接到板上的地引脚。该信号引脚通常是黄色或橙色，应连接到主板上的引脚pin 9。

图由 Fritzing 软件绘制

原理图

样例代码

/* Sweep
 by BARRAGAN <http://barraganstudio.com>
 This example code is in the public domain.

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

#include <Servo.h>

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}

void loop() {
  for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  }
  for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(15);                       // waits 15ms for the servo to reach the position
  }
}

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更多

• attach()
• write()
• map()
• Servo library reference
• Knob: 用电位器控制伺服的位置。
• Sweep: 扫描伺服电机前进后退的轴。