Remote controlled appliance switch circuit

admin January 21, 2014 108 Comments


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

 IR remote sensor IC TSOP 1738 is used for recieving 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.

Circuit Diagram with Parts List .


  • 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 them ok, your remote is of 38Khz type.Nothing to worry almost all TV remote are of this type.
  • You can use any switch 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 contacts of the relay .
  • Bishop
    April 12, 2018

    pls sir can use 5v relay with 5v power source in this circuit pls I want to build this circuit?

  • tagoor
    March 8, 2016

    sir i want the ckt for controlling 5 can any one pls help me…..

  • ariprasath
    May 31, 2015

    can anyone tell me how to connect the circuit to the appliance,plzzz……

  • James
    February 18, 2015

    please can this circuit be powered with 9v battery?
    if yes, can you give me your contact so that i get help in building the circuit.
    i am building a circuit which i can use to control an animal cage by using a remote i hhave tried different circuit but i still cannot get enough output to power the relay.

  • hardik patel
    February 9, 2015

    Which led is normally on when supply is given (d1 or d2)?

  • Rex
    February 3, 2015

    Seetharaman, what is positive fail safe switching, in this circuit

  • Rex
    February 3, 2015

    Seetharaman, what is positive fail safe switching,

  • Rex
    February 3, 2015

    Seetharaman, what is positive fail safe switching.

  • Rex
    February 3, 2015

    Seetharaman, what is positive fail switching.

  • Rex
    October 2, 2014

    If u need assistance in building this circuit, just call me, i have built it. Is working fine.

  • emzzy
    August 14, 2014

    replacement for BC 158 and SL 100 pls it urgent.. pls

  • emzzy
    August 14, 2014

    replacement for BC 158 and SL 100 pls it urgent

  • emzzy
    August 14, 2014

    pls sir I need replacements for bc158 and SL100 pls it urgent sir.

  • abraham
    July 29, 2014

    wl ds control 8 devices independently

  • chandu
    June 27, 2014

    how can i connect no of relays to circuit

    • Seetharaman
      June 28, 2014

      You can connect 6volt 100 mA relays 3 nos in parallel. You can use the single relay’s NO contact to switch any number of relays in parallel.

  • chandu
    June 23, 2014

    how much cost it takes to construct it?

  • Ramesh
    April 18, 2014

    seetharaman sir will you please tell me what is channel

  • April 3, 2014

    hello sir plz tell me what is the voltage rating of capacitors

    • Seetharaman
      April 3, 2014

      All capacitors can be of working voltage a min of 12 volt and max up to 63 volt DC.

  • Nim jade
    March 18, 2014

    This website is very useful.i am going to try this.i hope it works.

  • anjali
    March 13, 2014

    thankyou for the circuit.its working very well.we need to control the appliance with a single button on the remote.can anyone plz help us…our exhibition dates are approaching

  • Prajapati ketan
    December 21, 2013

    Sir, i want to design remote controlled home appliance ckt but in this circuit which type of relay used?i mean spdt or other and how many terminal of that relay? And at which terminals home appliance to be connected and which terminal circuit connected ? Plz sir give me detail abot relay and also abot IR same as that relay

  • Rex
    August 18, 2013

    Setharaman, i have (2) questions, (1) how can i wire this circuit to have 2 channels, or 4 channels. (2) How can i change the frequency of this circuit to enable it respond to other frequencies apart from the 38khz TV Remote transmitter

  • Rex
    August 17, 2013

    Setharaman, can this ic CD4017 be use to build 2-channel. or 3-channel or 4-channel Infra-Red Remote?

  • Rex
    August 17, 2013

    Seetharaman, can i use this ic, CD4017 to build 2-channel IR Remote control.

  • venky
    August 4, 2013

    This is really good

  • N.Murugesan
    August 1, 2013

    Thank you for .And I need the FM circuit for studying purpose.Can you send my mail?

  • muiz
    July 29, 2013

    Seetharaman, what software did you use for simulate this circuit..? thank you..

    • Seetharaman
      July 30, 2013

      Hi Rex minimum is 6 volts and maximum is 12 volts ensure relay is rated for the supplied voltage.
      Hi Muiz no software used only hard wiring of components and checking for practical reliable operation

  • Rex
    July 21, 2013

    Seetharaman, thank you very much, i have built this circuit. It is working very fine… But i have (2) problems:- (1) how can i reduce the 4sec long signal produce by the monostable NE555 to just (one) 1sec or even less than? (2) what is the minimum and the maximum power i can give to the circuit.. and what are the current ratings?

  • Rex
    July 20, 2013

    Setharaman, thank you very much, i have built this circuit, and is working fine… but one problem am having is the 4 sec long high signal produce by the NE555. It delays too much How can i reduce the 4 sec to 1 sec or even lower.

    • Seetharaman
      July 30, 2013

      Reduce R4 to 68K to achieve 1 sec delay. reduce it further for still lesser duration.

  • Rex
    July 19, 2013

    Seetharaman, i noticed something in this circuit, 10k resistor need to be connected between base and emitter of transistor (Q1), because the Remote tester circuit in this site, has 10k resistor in between base and emitter, why is this one not having 10k resistor? Will this circuit work, have you tried it before?

    • Seetharaman
      July 20, 2013

      Hi Rex In Tester the signal is taken from collector and in the above is taken from emitter. As per datasheet the condition for this IC is “The output voltage should not be hold continuously at a voltage below 3.3V by the external circuit”. Hence it is not required for the above circuit.

      • chandu
        June 27, 2014

        sir,how can i connect no of relays in that circuit

  • June 2, 2013

    Sir in the circiut a ground conection saw . Where i conect the ground

  • June 1, 2013

    please guide how ac connect to this circuit and where appliance will connect

  • May 28, 2013

    it is a wonderful website for making a simple project it make easly to understand with picture for materials

  • Harsha
    March 17, 2013

    This circuit components are not available can also be used in low voltage Dc circuits.

  • john
    February 27, 2013

    sir i cant find BC 158 what are the possible replacement for BC158

  • December 23, 2012

    u can ask me,i’ll help u any dought……

  • Dr Chandan Parashar
    December 2, 2012

    I am not getting 1738 at my place. Can I Use 1838 instead. is the pin configuration of both same.
    Please reply

  • Girish
    October 9, 2012

    May i use this circuit to switch on and off the led flashers using tv remote, pls advice me

    • Manish Mallick
      February 26, 2013

      since, the sensor of all circuit board are different there for we can’t use the another remote control…..

  • chris
    October 7, 2012

    i have used this circuit for 7 years for light circuit and still run perfect. All you need is a stabiole power source.

  • October 1, 2012

    Sir can this project be used in any appliances like heater

    • Dr Chandan Parashar
      December 2, 2012

      all depends on your Relay rating.
      Usually in India 6V relay will be of upto 5A rating. The heater 1KW will draw upto 6A. Hence, I will not recommend it for switching the heater.

  • Abhilash
    August 24, 2012

    sir,can we make remote for epson ebx9 projector to conrol power switch….?

    July 24, 2012

    plz i want the pin diagram of these three IC.

  • cant find tsop1738 in ecg data book
    May 27, 2012

    ic tsop1738 cant be find ,Pls assit.

    • jaga
      August 24, 2012

      I think its a sensor. Instead of it u can use television remote sensor.

  • Benjamin
    February 24, 2012

    I’ much interested in building this circuit, but the parts aren’t so easy to come by in my country.
    Do u have any advice to how I can get these parts

  • kamaal
    February 23, 2012

    i want 2 fan and 3 tube light circuit and programme

  • February 23, 2012

    hi sir,
    i want to connect this ckt to my fan and operate with my remote,is it possible are not,if so how?

  • Saurabh
    January 5, 2012

    heyy admin,
    this one is cool

    but if i want to make an ir remote controlled switch board for more than one on/off appliances using a microcontroller, then in that case could you please provide me with the circuit diagram of that.
    and necessary details of that

  • Baffa Bello dry
    January 5, 2012

    Hi lam happy for this cct.l made it for switching elect. bulbs in my room. Thankyou

  • seetharaman
    November 15, 2011

    Hi Abdul the 6volts relay contacts are rated for 220Volt AC and for rated current see the relay contact ratings or use a 6 volts relay wih required contact voltage and current rating.

  • Abdul Jakul
    November 14, 2011

    Is this can load directly to 22Ov for on/off switch?
    i plan to used it for light switch…

  • seetharaman
    November 5, 2011

    Hi Hemanth use the common and Normally open contact of the relay to operate any off/on control of any equipment.

  • hemanth
    November 4, 2011

    please tell me relay connections
    my i.d:-

  • hemanth
    November 4, 2011

    please tell me the relay connections
    how should i connect relay here

  • Javid ali
    November 3, 2011

    it’s realy a good circuit. I’m made it in the combetition. Thank u for circuits today & seetharaman

  • seetharaman
    November 1, 2011

    Hi Javid 1 to 1.5mm bit can beused. Use 12 volt relay increase the supply to 12 volts DC add a 560 ohms 1/4 between supply at the relay point to IC2 Pin16 in the positive rail. This will take care of the rest of the circuits

  • Javid ali
    November 1, 2011

    I want a kind help pleas. I don’t get 6V relay any where. I got only 12V relay. What i do. No much time for my combetition.

  • Javid ali
    November 1, 2011

    Which is the bit size used for the driller for making holes on PCB?

  • Javid ali
    October 31, 2011

    Ya.its amaizing & i gained more.

  • seetharaman
    October 31, 2011

    Hi Javid the following article will be useful to you please follow the link

  • Javid ali
    October 31, 2011

    I want to make a PCB by KCl3.what r the terms followed?
    Plz help me by giving definition/giving web site address.

  • Javid ali
    October 29, 2011

    Ok .thank u very much.

  • seetharaman
    October 29, 2011

    Hi Javid you can use 560 ohms or 680 ohms. it will not matter. the unit will work.

  • Javid ali
    October 29, 2011

    Hai… I lik to make this circuit for a combetition. But i have no 620 ohm resistance. May i use 220 ohm,390 ohm & 10 ohm in series?

  • seetharaman
    September 1, 2011

    Hi Visus Please note for 1838 1 is output 3 is supply and 2 is common. Kindly rewire as above it will become alright.

  • visus
    August 30, 2011

    hye ! I m using tsop 1838 an when i press tv remote switch ,d output goes to 3.94 v frm 4.9 , cn i use this in this crcuit n if not what actually is active low output of pin 3 frm tsop 1738 when ir is sensed

  • seetharaman
    August 3, 2011

    Hi Maaniq you can use your ir remote with the above circuit. with the relay contacy you can switch on / off any appliance within the rated capacity of its contacts(relay).

  • Maaniq
    August 2, 2011

    @seetharaman and all., i have two questions., can u plz resolve for me…..?
    1.can i use 38 khz remote transmitter for sony IR-D15A….?
    2.can i control my home appliances like fan or light ? BY driving a relay with the output of IR-D15A., will it drive a relay? 5v SPDT relay., so tat i can control my home appliances?
    plz reply ……. 🙂

  • seetharaman
    July 7, 2011

    Hi Nik you can try the following 15 channel controller Sony Ic ID-D15A with universal remote control.

  • seetharaman
    July 7, 2011

    Hi Nik you may try the following project for 4 channels

  • nik
    July 6, 2011

    can we make whole lighting scheme remote controlled by using 1 universal remote???

  • jahfarali
    June 17, 2011

    Good, It is working but it cannot use for tube will detect tube lights..

  • Abraham
    May 26, 2011

    i want to make this circuit please give me full description

  • Rajib
    February 28, 2011

    I am going to make it.

  • admin
    February 22, 2011

    i made a small modifcation to this circuit. Diode D4 is added so that the parts of the circuit other than the IC3 donot load the zener diode.

  • Saravanan
    February 22, 2011

    i gave connection as per circuit diagram…
    but my zener diode is heating….and LED 1 is not glowing,while LED 2 is glowing,
    and no output,
    plz help to solve my problem guys..

  • StudentCRO
    November 30, 2010

    This is what I got for my school project and we must make it in PROTEL design system (1994) so anyone got this draw on that program and possible to send me file? thx

  • Seetharaman
    November 30, 2010

    Hi Rakesh this can be used for any on/off application. for varying speed you have to add 4017 etc.

  • rakesh
    November 29, 2010


    it is possible to celling fan which is to be used in home appliances can you say that this circuit is applicable or not if it is not possible then send a appropriate circut for remote control celling fan thanking you


  • October 8, 2010

    hai frnds plz send me many projects.i wait for ur reply

  • Imteaz
    August 23, 2010

    To Seetharaman,
    Thanks for the tips. By solving false triggering problem this circuit may be used for multipurpose switching.

  • shreya
    August 22, 2010

    Hi seetharaman
    subject: 100watt sub-woofer
    i shorted R9 & R10 the temperature of transistors decreased but Q7 is getting hotter than Q5 why ?

  • seetharaman
    August 22, 2010

    Hi Imteaz you can connect 100uF and a reverse biased diode in parallel with relay coil K1, this should solve your problem as the back EMF from relay coil is false triggering your IC.

  • Imteaz
    August 21, 2010

    I was trying to make a touch switch by 555 and 4017. But when I used relay i faced false triggering of 4017. Is this circuit free from false triggering?

  • July 13, 2010

    IC2 is CD4017. If you have any doubts regarding this circuit. mail me to

  • rajesh
    June 9, 2010

    how i can rised the voltage from 1.5v to 12v.give me circuit me pls.

  • usama
    March 14, 2010

    plz tell me the number of ic2

  • Aarish shahab
    February 22, 2010

    i am going to work on this project………!!!

    February 11, 2010

    can i put this circuit on 9V

    February 9, 2010

    can i put TSOP1138 instead of TSOP1738? please reply on this e-mail

  • jay
    September 20, 2009

    can i connect light,fan,refregirator to this single circuit and operate.
    if we cannot what is the alternative to operate all the house hold elements.
    some body please help me in making a house hold appliances circuit.

    • admin
      September 20, 2009

      the load that can be connected to this circuit depends on the current capacity of the relay that you are using.
      You can get only one switching action from this circuit.More that one devices cannot be independently switched.

  • Vicky
    August 23, 2009

    its is working i have made this but the main problem iam facing is that when i apply voltage to the circuit it energises the relas mean it gets triggered every but its working i want to remove this triggering on power apply help me plz

  • July 15, 2009

    yaaaaa , its workinggggggggg

  • Arifuddin
    July 12, 2009

    I made this circuit. Its 100% working. But it is a complicated one. I designed my circuit slightly changing the above one which is very easy to make and working. contact me at
    for the schematic. hope you all like it.. 🙂

  • July 11, 2009

    hi , i am going to make this circuit today .
    can anybody tell me about this , i mean is it really working without any problem ? because i am a new comer . can u plz tell that this is tested ok ?

    my mail is

    • admin
      July 14, 2009

      This circuit will work.Please proceed

  • vali
    January 5, 2009


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