PWM With Arduino - Step by Step Guide

by jgrecoarroyo

74K2811

Intro: PWM With Arduino - Step by Step Guide

Small step by step guide on how to use the PWM (Pulse Width Modulation) of the Arduino board. The video includes the components needed and an easy to follow connection guide, as well as a demo of the results obtained. The code is also included. Try it out yourself, enjoy! :D

11 Comments

debrat.pranay 6 years ago

In this video i will describe how to generate PWM signal from arduino uno that means generate variable output voltage from digital device. Because variable voltage is essential for speed control of dc motor and angular position control of servo motor.
In arduino six pin 3,5,6,9,10,11 used for pwm. PWM means analog signal in digital form. https://youtu.be/82SfYWhw6fA

jessey 8 years ago

Hi, anyone know what type or value the pot is for this?

saarp18 10 years ago

What about doing it with Synapse modules rf engines?
Have you heard about them?

Veda88 10 years ago

What kind of motor are you using?

jgrecoarroyo 10 years ago

The motor used in the example is just a cheap regular DC motor. The kind of you can find in "science kits" for kids.

pratyadi 10 years ago

A modified Sketch that actually works with HS 422 servo, Gertboard and Raspberry Pi:
http://www.linuxcircle.com/?p=640

You do not need servo.h library

rclear 11 years ago

Very nice elaboration.
Will you specify what transistor you were using?

alien200049655 12 years ago

The code is a bit difficult to read in the video, could you please post it on your instructable?

jgrecoarroyo 12 years ago

Here is a link to the code: https://docs.google.com/document/d/1sVM4R4C8etX_34tTUtQkLbK3lBE_LEjYgY0WJMRuDi0/edit?pli=1

And here the code itself:

int motor = 9;
int potenciometer = 5;

void setup(){
  pinMode(9,OUTPUT);
  pinMode(5,INPUT);

  Serial.begin(9600);
}

void loop(){
  int value = analogRead(potenciometer);
                     //read input value: range between (0,1023)
  int motor_speed = value/4;
                    //PWM can only ouput 255 different values

  analogWrite(motor,motor_speed);

  Serial.println(motor_speed);//for testing purposes
}

agreco5 12 years ago

Useful and straight to the point - keep them coming!

jgrecoarroyo 12 years ago

Thanks, they will be more comming for sure :)