PWM Motor Control: control the power supplied to a load by varying the width of the pulses in a digital signal

 

Beginner Embedded C++ Project: PWM Motor Control

Introduction

Pulse-width modulation (PWM) is a technique used to control the power supplied to a load by varying the width of the pulses in a digital signal. This allows us to control the speed and direction of a DC motor.

Uses of this Project

• Control the speed of a fan
• Control the direction of a robot
• Dim the brightness of an LED

Requirements

• A microcontroller with a PWM peripheral
• A DC motor
• A motor driver (if the motor requires more current than the microcontroller can provide)
• Some wires

Code

// Define the PWM pin
const int pwmPin = 9;

// Define the motor driver pins
const int motorA = 10;
const int motorB = 11;

void setup() {
  // Set the PWM pin to output mode
  pinMode(pwmPin, OUTPUT);

  // Set the motor driver pins to output mode
  pinMode(motorA, OUTPUT);
  pinMode(motorB, OUTPUT);
}

void loop() {
  // Set the duty cycle of the PWM signal to control the speed of the motor
  analogWrite(pwmPin, 128);

  // Set the direction of the motor by setting the motor driver pins
  digitalWrite(motorA, HIGH);
  digitalWrite(motorB, LOW);

  // Delay for 1 second
  delay(1000);

  // Reverse the direction of the motor
  digitalWrite(motorA, LOW);
  digitalWrite(motorB, HIGH);

  // Delay for 1 second
  delay(1000);
}

Conclusion

PWM motor control is a powerful technique that can be used to control the speed and direction of a DC motor. This project is a great way to learn how to use PWM and get started with embedded C++ development.

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**PWM Motor Control: A Beginner Embedded C++ Project** Pulse-width modulation (PWM) is a technique used to control the power supplied to a load by varying the width of the pulses in a digital signal. This allows us to control the speed and direction of a DC motor. This beginner-friendly Embedded C++ project will guide you through the steps of controlling a DC motor using PWM. You will learn how to set up the hardware, write the code, and control the motor's speed and direction. **Requirements:** * Microcontroller with PWM peripheral * DC motor * Motor driver (if required) * Wires **Benefits:** * Learn the basics of PWM * Gain hands-on experience with embedded C++ * Control the speed and direction of a DC motor This project is suitable for beginners with basic knowledge of electronics and programming. It is a great way to get started with embedded C++ development and learn a valuable technique for controlling motors.