Remote controlled switch circuit

Remote controlled switch for Appliance

Description.

Here is a versatile remote controlled  switch that can ON or OFF any appliance connected to it using a TV remote.

IR remote sensor IC TSOP 1738 is used for receiving the signal. Normally when no signal is falling on IC3 the output of it will be high. This makes Q1 OFF.When a signal of 38 KHz from the TV remote falls on the IC3 its output goes low.This makes Q1 conduct and a negative pulse is obtained at pin 2 of IC 1 NE 555. Due to this IC1 wired as a monostable multivibrator produces a 4 Sec long high signal at its out put.This high out put is the clock for IC 2 which is wired as a Flipflop and of , its two outputs pin 3
goes low and pin 2 goes high. The high output at pin 2 is amplified to drive the relay. For the next signal the outputs of IC2 toggles state.  Result, we get a relay toggling on each press on the remote. Any appliance connected to this circuit can be switched ON or OFF.

Remote Controlled Switch Circuit Diagram with Parts List .

Remote Control Switch Circuit

Remote Controlled Switch Circuit Diagram

Notes:

* Before wiring the circuit make sure that the carrier frequency of the TV remote you have is 38 kHz.For that wire the sensor part only ,point your remote to the TSOP1738 and press any switch.If out put of TSOP1738 goes low then OK, your remote is of 38Khz type.Nothing to worry almost all TV remote are of this type.

* You can use any switch  of the remote because for any switch the code only changes, the carrier frequency remains same.We need this carrier frequency only.

* Assemble the circuit on a good quality PCB or common board.

* The appliance can be connected through NO or NC and C contacts of the relay .
* Use a regulated 6V power supply for the circuit.

We have many other Remote Control Circuits that you may like to read, Take a look:

1. RF Remote Control Circuit

2. FM Remote Encoder

3. Telephone Operated Remote

4. TV Remote Jammer

5. Ultrasonic Switch

Show Comments

49 thoughts on “Remote controlled switch circuit

  1. sandip

    hello sir,
    i have tried your circuit remote appliance switch and it works great but had left a problem that if i switch any other light or cfl it gets “turned on” if it is in off position and vice versa. so sir please send me any way to get rid of it,and i will wait for ur reply.
    THANKS.

    Reply
  2. emzzy

    pls Sir, I need equivalent of sl100 , I have connected it when I press d remote d1 goes off Nd on, But the load is not coming on. the relay is not switching.. pls reply me I’m using it by 16th of this month

    Reply
    • Seetharaman

      Use C & NO contact in series with the live wire connecting to the load. (using C & NO contact as an on/off switch)

      Reply
  3. Shabeeb.KP

    This is working !!
    I tried it in bread board and succeeded. I soldered it on a PCB and i am using it with a remote. Good idea appreciate you.Thanks

    Reply
  4. eletro lover

    Hi sir
    i make this circiut but it doesnt working when i give the power the led2 is become on and nothing when the remote is pressed pls help me sir iwant the answer now

    Reply
    • Seetharaman

      Check the connections of IC3. Check Q1 emitter voltage without input it should be almost supply voltage. with remote shining on IC3 Q1 emitter voltage should fall. If this is not happening check IC pins for proper wiring. Without remote control short collector and emitter of Q1 for a moment and check whether the LED D2 is changing from on to off. By giving pulses by shorting and leaving Q1 collector and emitter, should toggle D2 from on and off. If not check IC1 and IC2 wiring and for proper pin connections.

      Reply
    • Rex

      Hello electro lover, my name is Rex, i saw your coments about the Remote control, i can help you, i have made it, and it worked fine, if you need my help.. Call me +2348138181915

      Reply
  5. dhananjay singh

    in above circuit can u please explain the importance of zener diode & relay at that point..plzz help me out

    Reply
  6. seru

    I made that circuit completely and test work as a switch with tv remote control but when tube light switch On/Off at that time switch self operate . PLZ any solution this problem?

    Reply
  7. GREAT ATA

    Pls write the voltages of all the capacitors (c1 to c5) and the watts of all the resistors. Thanks

    Reply
  8. Naveen Gupta

    Amazing circuit…..a giant thanks to circuits today. My circuit worked on first attempt, i m so happy…thanks a lot….

    Reply
  9. kiran

    HELLO SIR,
    I WANT TO GET ONLY 6V OUTPUT. I WANT TO SWITCH ON SOME DC DEVICES.I DONT WANT TO TO FIX THIS CIRCUIT TO APPLIANCES.CAN YOU TELL WHERE TO CONNECT DC DEVICES.

    THANKS

    Reply
  10. Arifuddin Sheik

    HI Raghu! I understand your problem. It happens only when you turn on and off your circuit very fast. It happens because the capacitor contains some charge stored even you turn off and it takes sometime to discharge completely. So, if it is large delay when switching the circuit, the problem cannot be seen.

    Reply
  11. raghu

    this circuit is working fine but i have a small problem with this circuit..i have connected a ac motor as a load to the circuit and it is working perfectly ..but my problem is .. the circuit toggles state as soon as it is switched on .. i.e., if the motor is in running state when the power is switched off.. once the power resumes the motor will be in stop .. and vice versa.. i want the motor to be in off state irrespective of its state before it loses power…..

    Reply
  12. Arifuddin Sheik

    i have posted similar circuit which can be used to control home appliances. But it does not need the 555 timer. Using 100uF across the TSOP output is just enough to create a 1 sec delay. I have also designed TV Remote circuit which can control 8 devices using single receiver by using 1-8 remote keys. Check out my blog

    arif-ece.blogspot.com
    Arifuddin Sheik

    Reply
  13. seetharaman

    Hi Vinod Refer to Note and have you tried whether your remote control is respoding by checking for the out put of IC3 is going low. Check whether led D1 is flashing and D2 is changing from on to off with each press of the remote control. Check Q2 Connect a freewheeling diode (reverse biased) 1N400X series in parallel with relay coil of K1. With these checks you can solve the problem.

    Reply
  14. vinod

    there is a problem in my circuit
    remote control of appliances.
    circuit is completed,but there is a problem that load connected to the ckt is not showiing output…so please help me what to do…??

    Reply
  15. Arifuddin

    This is working !!

    I tried it in bread board and succeeded. I soldered it on a PCB and i am using it with a remote. You can make your own remote( very very small) also. If you have any quires, contact me at arifuddin2007@gmail.com

    Reply
  16. jude

    the ic2 mentioned here is the CD4017, this is a decoded counter, could you please explain how it can work as a flipflop?

    Reply
  17. sisila

    I had seen an error in your circuit it was no Zenner diode current limiting safty resistor.else Zenner can be damage by the high current.

    Reply

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