Category Archives: Tutorial

IR Control DC Motor — Circuit for IR Remote Control of DC Motor

In this lesson we develop a project that allow Remote Control of the speed and direction of a DC Motor. We use an Arduino Nano, and components from the Elegoo Kit. Also, to facilitate a clean build, we use Straight Jumper Wires.

The motor is connected according to this schematic:

Connection Diagram for a DC Motor Controller using the L293 Control Chip

Also, the remote control receiver is connected as follows: R on Remote to 5V, G on Remote to Ground, and Y on the Remote to Arduino Digital Pin 9. Go back and check out Tutorial 65 if you need more details on the Remote Module Connections.

In this video we will take you step by step through the build and coding for the project.

The code below is the software we developed in the video.

#include <IRremote.h>
int IRpin=9;
IRrecv IR(IRpin);
decode_results cmd;
String myCom;

int speedPin=5;
int dir1=4;
int dir2=3;
int mSpeed=255;

void setup()
{
Serial.begin(9600);
IR.enableIRIn();

pinMode(speedPin,OUTPUT);
pinMode(dir1,OUTPUT);
pinMode(dir2,OUTPUT);
digitalWrite(dir1,HIGH);
digitalWrite(dir2,LOW);
}

void loop() {
  while (IR.decode(&cmd)==0){ 
}
delay(1500);
IR.resume();

if (cmd.value==0xFF6897){
  myCom="zero";
  Serial.println(myCom); 
}
if (cmd.value==0xFF30CF){
  myCom="one";
  Serial.println(myCom); 
}
if (cmd.value==0xFF18E7){
  myCom="two";
  Serial.println(myCom); 
}
if (cmd.value==0xFF7A85){
  myCom="three";
  Serial.println(myCom); 
}
if (cmd.value==0xFF10EF){
  myCom="four";
  Serial.println(myCom); 
}
if (cmd.value==0xFF38C7){
  myCom="five";
  Serial.println(myCom); 
}
if (cmd.value==0xFF5AA5){
  myCom="six";
  Serial.println(myCom); 
}
if (cmd.value==0xFF42BD){
  myCom="seven";
  Serial.println(myCom); 
}
if (cmd.value==0xFF4AB5){
  myCom="eight";
  Serial.println(myCom); 
}
if (cmd.value==0xFF52AD){
  myCom="nine";
  Serial.println(myCom); 
}

if (cmd.value==0xFFA25D){
  myCom="pwr";
  Serial.println(myCom); 
}
if (cmd.value==0xFF629D){
  myCom="v+";
  Serial.println(myCom);
}
if (cmd.value==0xFFE21D){
  myCom="fun";
  Serial.println(myCom);
}
if (cmd.value==0xFF22DD){
  myCom="rew";
  Serial.println(myCom);
}
if (cmd.value==0xFF02FD){
  myCom="play";
  Serial.println(myCom);
}
if (cmd.value==0xFFC23D){
  myCom="ff";
  Serial.println(myCom);
}
if (cmd.value==0xFFE01F){
  myCom="dn";
  Serial.println(myCom);
}
if (cmd.value==0xFFA857){
  myCom="v-";
  Serial.println(myCom);
}
if (cmd.value==0xFF906F){
  myCom="up";
  Serial.println(myCom);
}
if (cmd.value==0xFF9867){
  myCom="eq";
  Serial.println(myCom);
}
if (cmd.value==0xFFB04F
){
  myCom="st";
  Serial.println(myCom);
}
if (myCom=="pwr"){
  digitalWrite(dir1,LOW);
digitalWrite(dir2,HIGH);
analogWrite(speedPin,255);
}
if (myCom=="fun"){
  digitalWrite(dir1,LOW);
digitalWrite(dir2,HIGH);
analogWrite(speedPin,0);
}
if (myCom=="ff"){
  digitalWrite(dir1,LOW);
  digitalWrite(dir2,HIGH);
  analogWrite(speedPin,mSpeed);
}
if (myCom=="rew"){
  digitalWrite(dir1,HIGH);
  digitalWrite(dir2,LOW);
  analogWrite(speedPin,mSpeed);
}
if (myCom=="up"){
  mSpeed=mSpeed+15;
  if (mSpeed>255){
    mSpeed=255;
  }
  analogWrite(speedPin,mSpeed);
}
if (myCom=="dn"){
  mSpeed=mSpeed-15;
  if (mSpeed<0){
    mSpeed=0;
  }
  analogWrite(speedPin,mSpeed);
}
}

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#include <IRremote.h>

int IRpin=9;

IRrecv IR(IRpin);

decode_results cmd;

String myCom;

int speedPin=5;

int dir1=4;

int dir2=3;

int mSpeed=255;

void setup()

{

Serial.begin(9600);

IR.enableIRIn();

pinMode(speedPin,OUTPUT);

pinMode(dir1,OUTPUT);

pinMode(dir2,OUTPUT);

digitalWrite(dir1,HIGH);

digitalWrite(dir2,LOW);

}

void loop() {

while (IR.decode(&cmd)==0){

}

delay(1500);

IR.resume();

if (cmd.value==0xFF6897){

myCom="zero";

Serial.println(myCom);

}

if (cmd.value==0xFF30CF){

myCom="one";

Serial.println(myCom);

}

if (cmd.value==0xFF18E7){

myCom="two";

Serial.println(myCom);

}

if (cmd.value==0xFF7A85){

myCom="three";

Serial.println(myCom);

}

if (cmd.value==0xFF10EF){

myCom="four";

Serial.println(myCom);

}

if (cmd.value==0xFF38C7){

myCom="five";

Serial.println(myCom);

}

if (cmd.value==0xFF5AA5){

myCom="six";

Serial.println(myCom);

}

if (cmd.value==0xFF42BD){

myCom="seven";

Serial.println(myCom);

}

if (cmd.value==0xFF4AB5){

myCom="eight";

Serial.println(myCom);

}

if (cmd.value==0xFF52AD){

myCom="nine";

Serial.println(myCom);

}

if (cmd.value==0xFFA25D){

myCom="pwr";

Serial.println(myCom);

}

if (cmd.value==0xFF629D){

myCom="v+";

Serial.println(myCom);

}

if (cmd.value==0xFFE21D){

myCom="fun";

Serial.println(myCom);

}

if (cmd.value==0xFF22DD){

myCom="rew";

Serial.println(myCom);

}

if (cmd.value==0xFF02FD){

myCom="play";

Serial.println(myCom);

}

if (cmd.value==0xFFC23D){

myCom="ff";

Serial.println(myCom);

}

if (cmd.value==0xFFE01F){

myCom="dn";

Serial.println(myCom);

}

if (cmd.value==0xFFA857){

myCom="v-";

Serial.println(myCom);

}

if (cmd.value==0xFF906F){

myCom="up";

Serial.println(myCom);

}

if (cmd.value==0xFF9867){

myCom="eq";

Serial.println(myCom);

}

if (cmd.value==0xFFB04F

){

myCom="st";

Serial.println(myCom);

}

if (myCom=="pwr"){

digitalWrite(dir1,LOW);

digitalWrite(dir2,HIGH);

analogWrite(speedPin,255);

}

if (myCom=="fun"){

digitalWrite(dir1,LOW);

digitalWrite(dir2,HIGH);

analogWrite(speedPin,0);

}

if (myCom=="ff"){

digitalWrite(dir1,LOW);

digitalWrite(dir2,HIGH);

analogWrite(speedPin,mSpeed);

}

if (myCom=="rew"){

digitalWrite(dir1,HIGH);

digitalWrite(dir2,LOW);

analogWrite(speedPin,mSpeed);

}

if (myCom=="up"){

mSpeed=mSpeed+15;

if (mSpeed>255){

mSpeed=255;

}

analogWrite(speedPin,mSpeed);

}

if (myCom=="dn"){

mSpeed=mSpeed-15;

if (mSpeed<0){

mSpeed=0;

}

analogWrite(speedPin,mSpeed);

}

Arduino, Tutorial

Arduino Tutorial 65: Creating Useful Commands from IR Remote Buttons

June 9, 2020 admin

In this lesson we show you how to map button pushes on the Infrared Remote Control to useful functions in the Arduino. This code can serve as the basis for using the remote control in many different applications.

We are building this with parts from our Elegoo Kit , and our actual build is using an Arduino Nano, which allows the project to be built on a single breadboard. You can get the neat jumper wires HERE.

The code developed in the video is available below:

#include <IRremote.h>
int IRpin=9;
IRrecv IR(IRpin);
decode_results cmd;
String myCom;
void setup()
{
Serial.begin(9600);
IR.enableIRIn();
}

void loop() {
  while (IR.decode(&cmd)==0){ 
}
delay(1500);
IR.resume();

if (cmd.value==0xFF6897){
  myCom="zero";
  Serial.println(myCom); 
}
if (cmd.value==0xFF30CF){
  myCom="one";
  Serial.println(myCom); 
}
if (cmd.value==0xFF18E7){
  myCom="two";
  Serial.println(myCom); 
}
if (cmd.value==0xFF7A85){
  myCom="three";
  Serial.println(myCom); 
}
if (cmd.value==0xFF10EF){
  myCom="four";
  Serial.println(myCom); 
}
if (cmd.value==0xFF38C7){
  myCom="five";
  Serial.println(myCom); 
}
if (cmd.value==0xFF5AA5){
  myCom="six";
  Serial.println(myCom); 
}
if (cmd.value==0xFF42BD){
  myCom="seven";
  Serial.println(myCom); 
}
if (cmd.value==0xFF4AB5){
  myCom="eight";
  Serial.println(myCom); 
}
if (cmd.value==0xFF52AD){
  myCom="nine";
  Serial.println(myCom); 
}

if (cmd.value==0xFFA25D){
  myCom="pwr";
  Serial.println(myCom); 
}
if (cmd.value==0xFF629D){
  myCom="v+";
  Serial.println(myCom);
}
if (cmd.value==0xFFE21D){
  myCom="fun";
  Serial.println(myCom);
}
if (cmd.value==0xFF22DD){
  myCom="rew";
  Serial.println(myCom);
}
if (cmd.value==0xFF02FD){
  myCom="play";
  Serial.println(myCom);
}
if (cmd.value==0xFFC23D){
  myCom="ff";
  Serial.println(myCom);
}
if (cmd.value==0xFFE01F){
  myCom="dn";
  Serial.println(myCom);
}
if (cmd.value==0xFFA857){
  myCom="v-";
  Serial.println(myCom);
}
if (cmd.value==0xFF906F){
  myCom="up";
  Serial.println(myCom);
}
if (cmd.value==0xFF9867){
  myCom="eq";
  Serial.println(myCom);
}
if (cmd.value==0xFFB04F
){
  myCom="st";
  Serial.println(myCom);
}

}

100

101

102

103

104

105

#include <IRremote.h>

int IRpin=9;

IRrecv IR(IRpin);

decode_results cmd;

String myCom;

void setup()

{

Serial.begin(9600);

IR.enableIRIn();

}

void loop() {

while (IR.decode(&cmd)==0){

}

delay(1500);

IR.resume();

if (cmd.value==0xFF6897){

myCom="zero";

Serial.println(myCom);

}

if (cmd.value==0xFF30CF){

myCom="one";

Serial.println(myCom);

}

if (cmd.value==0xFF18E7){

myCom="two";

Serial.println(myCom);

}

if (cmd.value==0xFF7A85){

myCom="three";

Serial.println(myCom);

}

if (cmd.value==0xFF10EF){

myCom="four";

Serial.println(myCom);

}

if (cmd.value==0xFF38C7){

myCom="five";

Serial.println(myCom);

}

if (cmd.value==0xFF5AA5){

myCom="six";

Serial.println(myCom);

}

if (cmd.value==0xFF42BD){

myCom="seven";

Serial.println(myCom);

}

if (cmd.value==0xFF4AB5){

myCom="eight";

Serial.println(myCom);

}

if (cmd.value==0xFF52AD){

myCom="nine";

Serial.println(myCom);

}

if (cmd.value==0xFFA25D){

myCom="pwr";

Serial.println(myCom);

}

if (cmd.value==0xFF629D){

myCom="v+";

Serial.println(myCom);

}

if (cmd.value==0xFFE21D){

myCom="fun";

Serial.println(myCom);

}

if (cmd.value==0xFF22DD){

myCom="rew";

Serial.println(myCom);

}

if (cmd.value==0xFF02FD){

myCom="play";

Serial.println(myCom);

}

if (cmd.value==0xFFC23D){

myCom="ff";

Serial.println(myCom);

}

if (cmd.value==0xFFE01F){

myCom="dn";

Serial.println(myCom);

}

if (cmd.value==0xFFA857){

myCom="v-";

Serial.println(myCom);

}

if (cmd.value==0xFF906F){

myCom="up";

Serial.println(myCom);

}

if (cmd.value==0xFF9867){

myCom="eq";

Serial.println(myCom);

}

if (cmd.value==0xFFB04F

){

myCom="st";

Serial.println(myCom);

}

Arduino, Tutorial

Arduino Tutorial 64: Understanding and Using the Infrared (IR) Remote to Control a Project

June 2, 2020 admin

The Elegoo Kit contains a simple IR module and remote which allow you to add remote control to your arduino project. In this lesson we show you how to connect the remote, and then how to send signals to the arduino using the remote unit. This video takes you through the process step by step.

The code below will get you started, and then you can expand the code to map all the buttons to simple string commands.

#include <IRremote.h> //Make sure to install the library
int IRpin=9;
IRrecv IR(IRpin);
decode_results cmd;
String myCom;
void setup()
{
Serial.begin(9600);
IR.enableIRIn();
}

void loop() {
  while (IR.decode(&cmd)==0){ 
}
Serial.println(cmd.value,HEX);
delay(1500);
IR.resume();

if (cmd.value==0xFF6897){
  myCom="zero";
  Serial.println(myCom); 
}
if (cmd.value==0xFFA25D){
  myCom="pwr";
  Serial.println(myCom); 
}

}

#include <IRremote.h> //Make sure to install the library

int IRpin=9;

IRrecv IR(IRpin);

decode_results cmd;

String myCom;

void setup()

{

Serial.begin(9600);

IR.enableIRIn();

}

void loop() {

while (IR.decode(&cmd)==0){

}

Serial.println(cmd.value,HEX);

delay(1500);

IR.resume();

if (cmd.value==0xFF6897){

myCom="zero";

Serial.println(myCom);

}

if (cmd.value==0xFFA25D){

myCom="pwr";

Serial.println(myCom);

}

We are building this with parts from our Elegoo Kit , and our actual build is using an Arduino Nano, which allows the project to be built on a single breadboard. You can get the neat jumper wires HERE.

Arduino, Tutorial

Arduino Tutorial 63: Dimensional Analysis Example Problems

May 26, 2020 admin

Dimensional Analysis is one of the most important tools in the Engineers tool kit. In today’s lesson we take you through it step-by-step with example problems.

Arduino, Math, Tutorial

Arduino Tutorial 62: Understanding How to Use Dimensional Analysis

May 19, 2020 admin

<span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: hidden; line-height: 0;" class="mce_SELRES_start"></span>
Dimensional Analysis is one of the most important tools used by practicing engineers and scientists, and allows you to convert from any set of units to any other set of units. It provides an a methodical method that takes the guess work out of conversions. This video takes you through the method step-by-step with several examples. The homework should be done before watching the next video.

Technology Tutorials

Category Archives: Tutorial

Arduino Tutorial 66: Controlling DC Motor, Speed and Direction with a Remote

Arduino Tutorial 65: Creating Useful Commands from IR Remote Buttons

Arduino Tutorial 64: Understanding and Using the Infrared (IR) Remote to Control a Project

Arduino Tutorial 63: Dimensional Analysis Example Problems

Arduino Tutorial 62: Understanding How to Use Dimensional Analysis

Making The World a Better Place One High Tech Project at a Time. Enjoy!