Controlling a Servo Motor

This scenario demonstrates how to control the position of a servo motor using Arduino. Servo motors are used for precise angular positioning in robotics and automation.

• Familiarize yourself with Arduino hardware reference.
• Install the built-in Arduino Servo library.
• Understand basic PWM concepts for servo control.

Servo specifications:

• Standard miniature servo (SG90 or similar)
• Voltage: Typically 5V
• PWM frequency: 50 Hz
• Rotation range: ~0° to 180°

• Arduino programming fundamentals
• Arduino Uno Hardware Reference

Write a program that rotates the servo sequentially to 0°, 90°, and 180°, pausing for one second at each position.

#include <Servo.h>

Declare a servo object and assign it a pin:

Servo myServo;
const int servoPin = 10;

Attach the servo object to the servo pin:

void setup() {
  myServo.attach(servoPin);
}

Program the servo rotation sequence:

void loop() {
  myServo.write(0);    // Move to 0 degrees
  delay(1000);         // Wait 1 second
 
  myServo.write(90);   // Move to 90 degrees
  delay(1000);         // Wait 1 second
 
  myServo.write(180);  // Move to 180 degrees
  delay(1000);         // Wait 1 second
}

Observe the servo motor rotate precisely to the angles 0°, 90°, and 180°, pausing clearly at each position.

If the servo does not move or jittering occurs:

• Check the servo connections (signal to pin 10, power, and ground).
• Ensure power supply is stable (servo typically requires 5V).
• Verify servo library inclusion and pin assignment.