Remote control tester circuit

jacky January 21, 2014 43 Comments

Remote control tester


This is a simple remote controller tester circuit  based on infrared sensor IC TSOP 1738. When the IR waves fall on the sensor it output changes to low state.This makes the transistor Q1 ON and LED will blink according to the code contained in the signal. So for press of each button the LED blinks in different ways. This is a good indication of the working of remote.The diode D1drops 0.7 V to give the IC ~ 5V supply from the available 6V . R2 is a current limiting resistance.

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Remote Control Tester Circuit Diagram with Parts List .

Remote Control Tester Circuit

Remote Control Tester Circuit Diagram

Notes .

  • Use a 6V battery to power up the circuit.
  • This circuit can be used to test remotes operating in the 38Khz carrier frequency.Almost all remotes fall into this category so no problem.

We have more Remote Circuits in our website; that you may like to read:

1. Remote Control Circuit

2. Remote Controlled Switch

3. IR to RF Converter Circuit

4. Remote Toggle Switch

5. IR Transmitter Circuit

  • akhilesh
    January 8, 2013


    if I connect toy motor (3-6V DC motor,toy motor) instead of LED-D2, it can work?
    i want to use this circuit to my baby toy car

  • akhilesh
    January 8, 2013


    if I connect toy motor (3-6V DC motor,toy motor) instead of LED-D2, it can work?

  • akhil
    November 18, 2012

    can we use 9v battery instead of 6v battery…pls help.

    • October 4, 2015

      Yes, but you must use a 5V stabilizer (78L05, for example) to the IR sensor (to replace D1, R2) and recalculate R3 for optimum power LED (D2). It can connect a piezo speaker between the transistor collector and the negative terminal to take and sound indication.

  • July 27, 2012

    pse send me full description with components wise and circuit diagram of remote controlled car with wireless camera at a distance 50-100 mtrs.

  • darshan
    July 19, 2012

    give me power electronics circuit diagram in pcb and bradboard imm.

  • seetharaman
    December 29, 2011

    Hi Rahul BC548 is NPN transistor. you have to use PNP transistor like BC558, 158, 177 or S8550 2N2905 etc.

  • Rahul
    December 28, 2011

    can u plz tell me that if we use BC 548 here in this circuit , then will it work properly and will there be any change in position of transistor? PLZ Reply It’s urgent…

  • November 10, 2011

    This remote tester is working successfully for all kind of remotes. thank you very much

    but i need clear clarification about this tsop i read in online but not clear can u help me.

  • BMK
    September 27, 2011

    hai..!pls giv the PCB design…

  • March 10, 2011

    can i give you a circuit diagram for made a remote controle switch for bulb or fan or oll 220v line onely 300taka bd
    call me +008801710899279

    • john
      March 10, 2011

      Hi Shohel,
      Please check your e-mail.

  • February 20, 2011

    can U give a circuit diagram for made a remote controle switch for bulb or fan

  • alok
    January 19, 2011

    what is the range of this circuit…?????

  • May 6, 2010

    Dear Mr.Thomas

    I have requested you for Synchro to Digital Conversion circuit diagram

    Can U please send me at the earliest



  • seetharaman
    April 23, 2010

    Dear Krishnamurthy
    I am still hed up at Rajasthan. I am expected at Chennai by this month end. I will positively try and give a feed back. Sorry for the delay.
    I use standard 3pin IR sensor of TV receiver module at
    RS 25.00, in my remote sensor tester. the circuit which i am using is
    quite useful stuff to check all remotes at home.

  • Krishnamurthy
    April 22, 2010

    Dear seetharaman did you tried the circuit at your lab, can you tell me the problem in the circuit – Krishnamurthy.

  • seetharaman
    April 4, 2010

    dear sri krishnamurthy i am back at my lab. in a day or two i will try a design and come back to you.

  • Krishnamurthy
    April 3, 2010

    Dear Mr. Seetharaman Iwas able to view the circuit you were refering. This may not work properly. Please check with my comment in the above site

  • seetharaman
    March 30, 2010

    Dear Krishnamurthy you can try the IR transmitter used in the following site. two IR LEDs are used with NE555 and 9 volt supply. most of the circuits of this blog is working ok. i will be back to my lab by 2nd april i will try and come back to you on the IR transmitter.

  • Krishnamurthy
    March 26, 2010

    Dear MR. Seetharaman
    Idont know how to paste the circuit in this submit column. I can describe circuit I used. I used 555 timer as austable MV to oscilate at 38Khz. The out put is fed to a 2N3019 transister basae via 1K res. Emiter connected to ground. The IR diode is connected to the collector through a 67 Ohm resister. The supply volt is 6V. I measured the frequecy at the collector and confirmed the signal is available. There is no other way to check transmission. But IR detecter is not detecting.

  • seetharaman
    March 26, 2010

    Hi Krishnamurthy the problem with the circuit is the current feeding the chip is through the diode hence always there will be a drop of 0.65 volt which will trigger the transistor continuously that is the reason i recomended you to shift the emitter. The IC is with IR filter so it should work with any single IR diode transmitter. You may check you transmitter, you can mail me your circuit i will try and suggest if anything required

  • Krishnamurthy
    March 26, 2010

    Hi Seetharaman Thank you for your help. Just before getting your comment I tried connecting a 4.7K between base and emitter of Q1. The problam was solved! It detected T.V remote signals. But alas it could not detect IR transmitter I have built. Just how many IR diodes I have to use to get the receiver work? I used Just one.

  • seetharaman
    March 25, 2010

    Hi Krishnamurthy, This ICs out with no signal will be high and with signal it will become low. May be the quiescent current through IC1 it self is biasing Q1 may be your specimen if of quite high gain. Can you try by shifting the emitter of Q1 to R2 IC1 junction, which may solve your problem. Since I am away from my lab, could not try and give you a feedback.

  • Krishnamurthy
    March 24, 2010

    Iassembled this circuit. But the LED glows constantly even if i compltely cover the IR sensor. What could be the problem? Please help me.

  • talha
    March 21, 2010

    i required the circuit which can turn on/off two or more devices using normal remote.
    plz help me out..


  • riddick
    March 5, 2010


  • twits4twats
    February 7, 2010

    Dear All No need go to make this circuit digram pls use ur camara mobile phone
    1)on u r mobil phone camara
    2)Press button remot control show the lence
    3)u can look very clear IR Led Flashing mobil phone display screen



    Once again, sometimes the most obvious solutions are staring you in the face. You are correct, if you turn your cell phone camera on and face it directly into the infra red LED’s, you will see the LED’s shining white. ***WARNING*** DO NOT LOOK DIRECTLY INTO THE INFRA RED LED’S. Prolonged exposure can harm.
    Please note that the purpose of this website is education and why use something mass produced if you can build something yourself and learn something in the process.

  • uday
    February 6, 2010

    the circuits u r providing is wondrful………….
    ithink it will be more if you explaian the working with each component in it.

  • piscean
    January 31, 2010

    It Works… WoW

  • January 15, 2010

    sir i want led tecometer 12v diagram.please send me thanks

  • amit siroya
    August 29, 2009

    honerable,circuits today

    I am regularly visitor of your site.i want to make a circuit.the application of this circuit is when we speak any word in this manner led will on.this project will based on the led.ex.i say “technology”in this manner led will on and i saw this word on display.
    so,give me circuit for this application.and also give me program of this circuit.

    thank you,

  • mozifur
    August 18, 2009

    it is a wonderful circuit.

  • July 14, 2009

    i want a remote control circuit with 50 to 100m range

    • admin
      July 16, 2009

      it will be here soon

  • sudheep
    June 14, 2009

    i need a mobile locator circuit with small display could u give me?

  • rafeekh.k.k
    April 19, 2009

    Dear All No need go to make this circuit digram pls use ur camara mobile phone
    1)on u r mobil phone camara
    2)Press button remot control show the lence
    3)u can look very clear IR Led Flashing mobil phone display screen


    • admin
      April 19, 2009

      that’s a good cameras can sense IR and its of course the best idea.

  • March 27, 2009

    i need remot control circuit !!!

    plz halp my i have iazam

    • admin
      April 5, 2009

      please tell me which type of remote control circuit you need

  • Varghese
    July 8, 2008

    Hi “admin”

    Can you give a circuit diagramme of ‘SATELITE DIRECTION FINDER’

  • Syarif
    June 29, 2008

    this article is very good.but can you provide the toturial guide for all articles?.

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