Published September 19, 2016 © GPL3+

TV remote controlled Light and Fan

Make use of infrared receiver to receive signals and control the relays

BeginnerFull instructions provided1 hour27,275

Things used in this project

Hardware components

IR receiver (generic)

Arduino UNO

or AVR Atmega328p if you want to make a permanent soldered circuit

HL-525 relay module

Or any relay board having 2 or more channels

Hand tools and fabrication machines

A TV remote

Story

This project is about controlling your room lights and/or fan wirelessly, all while sitting on your couch. The reason why I chose this project was because TSOP receiver was the best suited component for a short ranged wireless communication.

Firstly, it is really really cheap (Rs. 10 in India). Plus, you already have a transmitter with you i.e. the TV remote.

The TV remote sends Infrared signals at 38 kHz frequency and the TSOP receiver that I purchased can receive signals between 36-40 kHz.

The pinout of the receiver may vary according to the model

The one that I have has- OUT , GND , VS from left to right

TV remote outputs high and low pulses at high frequency, thus, switching on and off the IR LED multiple times in a second corresponding to those pulses. Whenever the LED is ON , the TSOP goes low and when the LED is OFF, the TSOP is high (which means that it is also high when it is idle).

Here's the relay module :

GND IN1 IN2 VCC. IN1 is for the left relay and IN2 is for the right relay.

These inputs, when receive a LOW, switch the relay on i.e. the switch is 'closed'.

I have posted a video of TV remote switching the relay on/off. Due to absence of a working extension board with a bulb holder, unfortunately, I can't post a video of the lamp turning on/off. But I will post it soon. Here's the connection for connecting the lamp to the relay :

In my module too, from left to right- the 3 pins are: NC (normally connected), COM (common), NO (normally open). Connect the live wire to the bulb as shown. You can solder the entire project and install it inside your switch board to control your tubelight, fan, lamp etc.

NOTE: On the left side of relay module, there are 3 pins: DVcc Vcc and GND. I strongly suggest you to remove the jumper and give the DVcc pin a separate 5V supply because it is connected to an optocoupler (which prevents physical connection between high ac voltage and the microcontroller) so that in case of spikes, your microcontroller is not damaged.

Code

Arduino code

#include <IRremote.h>
#include <IRremoteInt.h>


int RECV_PIN=11;

IRrecv irrecv(RECV_PIN);
decode_results results ;

void setup() {
  // put your setup code here, to run once:
  pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
Serial.begin(9600);
irrecv.enableIRIn();
}

void loop() {
  // put your main code here, to run repeatedly:
if(irrecv.decode(&results))
{
  Serial.println(results.value, HEX);
 translateIR();
  irrecv.resume();
}
}
void translateIR()
{
  switch(results.value)
  {
    case 0x80BFC13E:
    digitalWrite(3,LOW);
    break;
     case 0x80BF4BB4:
     digitalWrite(3,HIGH);
    
     break;
    case 0x80BF837C:
    digitalWrite(4,LOW);
     break;
    case 0x80BF9966:
    digitalWrite(4,HIGH);
     break;
  }
}

Credits

Rishabh

4 projects • 31 followers

I am an ECE engineer with embedded systems , circuit designing and Hardware engineering as my areas of interest. plz check my projects out

TV remote controlled Light and Fan

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Schematics

How TSOP is connected

image file for the schematic

schematic

Serial monitor

Receiving HEX codes

Relay being turned on or off

Code

Arduino code

Credits

Rishabh

Comments

Embed the widget on your own site

TV remote controlled Light and Fan

TV remote controlled Light and Fan

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Schematics

How TSOP is connected

image file for the schematic

schematic

Serial monitor

Receiving HEX codes

Relay being turned on or off

Code

Arduino code

Credits

Rishabh

Comments

Related channels and tags