Control Robot With A TV Remote

Step 1: Introduction

Step 2: Materials

Step 3: Procedure

Before moving any further, download and install infrared library. so visit https://github.com/shirriff/Arduino-IRremote/

Steps on how to install a library can be found here. This project heavily relies on coding.

Now we need to select the HEX codes of the remote to use it to send directions to our robot. Connect the IR receiver to the arduino as shown in the schematics. Then, open the serial monitor and press four remote buttons you wanted to use to control the movements of the robot ( I used the up/down arrows, you could use numbers instead). Jot down the HEX code.
 

<p>int receiverpin= 11;<br>#include <IRremote.h></p><p><irremote.h><irremoteint.h><irremotetools.h>IRrecv irrecv(receiverpin); // create instance of irrecv
decode_results results;</irremotetools.h></irremoteint.h></irremote.h></p><p>void setup() 
{
Serial.begin(9600);
irrecv.enableIRIn();
}</p><p> void loop()
  {
   if (irrecv.decode(&results)) // have we received an IR signal?
    {
        Serial.print(results.value, HEX); // display IR code on the Serial Monitor
        Serial.print(" ");
        irrecv.resume(); // receive the next value
     }
   }</p>

I got the following Hex codes:

Up arrow= 9CB47

Down= 5CB47

Left= 3CB47

Right= DCB47

Test ends here. Full setup will be explained in the schematics and code section.

 

Step 4: Schematics

 

In addition to my previous project's schematics, this setup should be accompanied with it.

Unlike previous project, there is a slight change in the pins that are connected to the motor are as follows:

Right side
Pin 1 --------------------------------- 4 of Arduino

Pin 2 --------------------------------- 7

Pin 3 --------------------------------- 6 (PMW pin)

Pin 4 --------------------------------- 13

Pin 5 --------------------------------- 12

Pin 6----------------------------------- 9 (PMW pin)

If you find the robot tracks are rotating in opposite directions, that is clockwise and anti-clockwise or vice-versa, reverse the pins (4-7 to 7-4) or numbers in the code.

see the full code in next step.


 

Step 5: Code

 

<p>int receiverpin= 11;<br>#include <IRremote.h><irremote.h></irremote.h></p><p>IRrecv irrecv(receiverpin); // create instance of irrecv
decode_results results;</p><p>void setup() 
{
  Serial.begin(9600);

  //left motor 
  pinMode(4,OUTPUT); //
  pinMode(7,OUTPUT);
  pinMode(6,OUTPUT); //pwm
  //right right
  pinMode(13,OUTPUT);
  pinMode(12,OUTPUT);
  pinMode(9,OUTPUT);//pwm
  
  irrecv.enableIRIn(); // start the receiver
}</p><p>void onLED(int pin, int voltage)
{
  digitalWrite(pin, voltage);
}</p><p>void goForward(int duration, int pwm)
{
   digitalWrite(4,HIGH);
   delay(duration);//100
   digitalWrite(7,LOW);
   analogWrite(6,pwm);//right motor
  
   digitalWrite(13,HIGH);
   delay(duration);
   digitalWrite(12,LOW);
   analogWrite(9,pwm);// right motor 
}</p><p>void fullReverse(int duration, int pwm)
{
   digitalWrite(4,LOW);
   delay(duration);
   digitalWrite(7,HIGH);
   analogWrite(6,pwm);
  
   digitalWrite(13,LOW);
   delay(duration);
   digitalWrite(12,HIGH);
   analogWrite(9,pwm);// right motor
    
}</p><p>void fullStop(int duration, int pwm)
{
   digitalWrite(4,LOW);
   delay(duration);
   digitalWrite(7,LOW);
   analogWrite(6,pwm);// 
  
   digitalWrite(13,LOW);
   delay(duration);
   digitalWrite(12,LOW);
   analogWrite(9,pwm);// right motor
}</p><p>void turnLeft(int duration, int pwm)
{
   digitalWrite(13,LOW); 
   delay(duration);
   digitalWrite(12,HIGH);
   analogWrite(9,pwm);// right motor
  
   digitalWrite(4,HIGH);
   delay(duration);
   digitalWrite(7,LOW);
   analogWrite(6,pwm);
    
}</p><p>void turnRight( int duration, int pwm)
{
   digitalWrite(13,HIGH); 
   delay(duration);
   digitalWrite(12,LOW);
   analogWrite(9,pwm);// right motor
  
   digitalWrite(4,LOW);
   delay(duration);
   digitalWrite(7,HIGH);
   analogWrite(6,pwm);
  
}
void translateIR()
// takes action based on IR code received
  // uses Sony IR codes
{
  switch(results.value)
  {
    case 0x9CB47: goForward(100,120); // (x,y), adjust the y values for speed
    break;</p><p>    case 0x5CB47: fullReverse(100,100); 
    break;</p><p>    case 0x3CB47: turnLeft(100,120);
    break; </p><p>    case 0xDCB47: turnRight(100,120);
    break; </p><p>    default:fullStop(100,0);
    break;</p><p>  }
}</p><p> void loop()
  {
   if (irrecv.decode(&results)) // have we received an IR signal?
    {
      onLED(2,255); // on led when the signal is being recieved 
      translateIR();
        for (int z = 0 ; z < 2 ; z++) // ignore the repeated codes
           {
              irrecv.resume(); // receive the next value
            }
     }
    else
    {
      onLED(2,0); // off if the signal is not being recived
    }
  }</p>

• lr_tank_fullcode.ino

Step 6: Future Updates

Very soon I'll be posting on how to make an object avoiding robot. Followed by, camera and wifi controlled robot.

So, stay tuned for more instructables. Until then, hasta la vista.

Please VOTE, if you like it.

Thanks

Saimouli Katragadda


Source:Instructables