• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

Circuits for Beginners | Basic Circuits | LED Driver | Hobby Circuits | Transistor Circuits

New-Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright

Home » Remote Control » Remote Controlled Night Lamp Circuit

Remote Controlled Night Lamp Circuit

Last Updated on July 3, 2019 by Swagatam 74 Comments

The post explains a simple IR based remote controlled night lamp timer circuit. The idea was requested by Mr. Raj Kumar Mukherji.

Technical Specifications

Please provide the component values and the modified circuit if:

a. the circuit is made to work from 4.5 volts or 5 volts
b. the relay is replaced with a 5mm LED
c. the circuit is triggered by TSOP1738
d the delay time is set for 2 mins max

This is for an old person in my locality. He wants a low cost portable light which he would turn on
remotely for a brief period at night and the light would get turned off automatically. He has to get up at night to drink water etc and he does not want a night lamp to be on the whole night or to operate one from the mains power. The best idea that came in my mind is to use the transistorized timer circuit in combination with a TSOP1738 and using 2 or 3 AA cells.

Thanks and regards,
Raj Kumar Mukherji

The Design

The proposed remote night lamp timer circuit can be visualized in the above diagram and understood with the following points:

The IR sensor TSOP1738 responds to an incoming IR signal from a suitable IR handset such as a TV remote or similar, and produces a logic low at its pin labelled as "out". The directed Tx signal could be momentary, probably for a fraction of a second for initiating the triggering response in the circuit.

The above action instantly charges the 100uF and also switches ON the BC557. This correspondingly turns on the BC547 and the LED.

The stored charge sustains the switched ON position for a certain time period determined via the selected values of the 100uF capacitor and the 1M resistor. These may be altered, experimented for acquiring any desired time delay for the LED illumination period.

The 100uF slowly starts discharging via the 1M resistor and the base/emitter of the BC557 until it becomes too low for the transistors to hold the conduction, the LED consequently is also switched OFF as soon the RC determined time is elapsed.

The 1K and the 1N4148 diode ensures a complete discharge of the timing capacitor 100uF each time the LED is switched OFF, so that the new cycle is able to begin with a correctly discharged capacitor, for executing consistent time delays, with minimum errors.

The above design can be upgraded as shown below for getting improved response:

 

You'll also like:

  • 1.  How to Make a Remote Control Circuit from a Remote Bell
  • 2.  Firecracker Igniter circuit [Remote Controlled with Timer]
  • 3.  Quadcopter Remote Control Circuit without MCU
  • 4.  Infrared (IR) Motor Remote Control Circuit
  • 5.  2.4 GHz 10 Channel Remote Control Switch
  • 6.  Make this TV Remote Jammer Circuit

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Subscribe2


 

Reader Interactions

Comments

    Your Comments are too Valuable! But please see that they are related to the above article, and are not off-topic! Cancel reply

    Your email address will not be published. Required fields are marked *

  1. adesina temiloluwa says

    Cool

    Reply
    • Swagatam says

      thanks!

      Reply
  2. adesina temiloluwa says

    I want you to be realistic sir, can u refer me to an inverter circuit on your blog that can power a laptop and a 15watt cfl bulb at the same time I want a cost effective one sir. I know I can search for it myself but I want you to choose for me the load won't be too much as u can see

    Reply
  3. Ram says

    Sir I want to add below circuit with this one but I have some confusion to connecting with IC pin. Can you check and conform . I bought all parts and dont want to bear burn of any part.
    https://www.homemade-circuits.com/2011/12/how-to-build-simple-hi-efficiency-led.html
    s1.postimg.org/n8dgq7fen/IC_4049.jpg

    Reply
    • Swagatam says

      Ram, the diagram is clearly shown in this post:

      https://www.homemade-circuits.com/2011/12/how-to-build-simple-hi-efficiency-led.html

      please do it exactly according to this diagram and nothing will burn.

      Reply
  4. Ram says

    I have confusion in pin 2 and 5 , both are connected together then need to connect with resister ?

    Reply
    • Swagatam says

      It's perfect…no resistor is required there.

      Reply
  5. Bibin Edmond says

    hi swagatam,

    i got a problem with this circuit, the circuit turns on automatically when its powered and stays on… i powered it with a 4v 500mah lead acid battery.. what could be the problem ?

    Reply
    • Swagatam says

      Hi Bibin,
      remove the TSOP sensor and check.

      If it still switches ON then definitely the problem could be somewhere in your design because without a ground signal to 1M the circuit can never switch ON.

      If it's not the case then the problem could be with the sensor configuration, it may be leaking some ground to the 1M…which can be rectified either by adding a zener diode in series with its OUT pin or reduce its supply voltage for the same

      or through some other alternative method which will eliminate a ground to 1M until the sensor is actually activated.

      Reply
    • Bibin Edmond says

      Hi swagatam,

      i replaced the tsop sensor with a new one.. now its working properly..

      thankyou swagatam….

      Reply
    • Swagatam says

      That's great Bibin, thanks for the update.

      Reply
  6. Pritam Bhowmik says

    want this ckt to drive about 500mA at 3.3 volts, biasing with 4 v battery. My point of view is to add a tip122 as buffer for higher current application.. is it right??

    Reply
    • Swagatam says

      yes that's correct!

      Reply
  7. Pritam Bhowmik says

    any suggestion for connection.

    Reply
    • Swagatam says

      simply replace BC547 with TIP122

      Reply
  8. gopi krishna says

    What could be its remote swagatam ??

    Reply
    • Swagatam says

      you can use any TV remote handset…

      Reply
  9. Pritam Bhowmik says

    oh Thanx bro.

    Reply
  10. Ram says

    SIr plz add one very simple circuit for IR Transmitter too which can operate on button cell. Then we can use it for many useful applications.

    Reply
    • Swagatam says

      Ram you can refer to this article for the Tx circuit:

      homemadecircuitsandschematics.blogspot.in/2013/03/simple-reliable-infrared-ir-remote.htmlmotion detector on online

      Reply
  11. Ram says

    I guess its simply a IR LED with Resister in series as per battery ?

    Reply
  12. Pritam Bhowmik says

    Just a 10 ohm 1/4 watt resistor will work in series with 3v button cell. Use a push button to blink the ir.you are done.

    Reply
  13. Henrik Lauridsen says

    Hi Swagatam,

    I just love your circuits and have just finished drawing (in ExpressPCB) and etched some of them. Now I am looking forward to build them.

    Could you provide me with a schematic for a timer circuit with presets and 7-segments?
    I need a timer circuit where I can adjust the time from 0 to 999 seconds.
    When adjusting the time preset the 7-segment shall show the preset time.
    When time is running the 7-segments shall show the remaining time. When the time period has elapsed a relay should be activated.
    Also needed a reset button to start all over.

    Thank you,
    Henrik

    Reply
    • Swagatam says

      Hi Henrik,

      0-999 seconds timer circuit with preset display is possible but showing the remaining time looks difficult,….. if i happen to crack it I'll post it in my blog…

      Reply
  14. Henrik Lauridsen says

    Hi Swagatam,
    Thank you for your reply.
    Please don’t waste too much of your time on showing the remaining time. I wasn’t aware of the difficulties by showing the remaining time. I would be happy for the circuit even without showing the remaining time.

    Reply
    • Swagatam says

      Thanks Henrik,

      I'll try to post it soon in this blog, please check back after a couple of days

      Reply
    • Swagatam says

      Hi Henriks,

      I tried to figure out the design, it could get quite complicated with 4 to 5 ICs and many passive parts due to the inclusion of the time display module,

      Reply
  15. raj says

    Hi Sir,

    I am Raju, I want LED Lantern circuit with Remote operation(12 Led's, 8mm, 4v 1500ma Lead Acid Battery) any suggestions.

    Reply
    • Swagatam says

      Hi Raju,

      you can connect all the LEDs in parallel with the battery terminals, and for remote operation you can buy any single relay RF remote control unit and wire its relay with the LED

      Reply
  16. Henrik Lauridsen says

    Hi Swagatam,

    I have just tried this circuit Remote Controlled Night Lamp Circuit with Timer.
    It works great except that the LED turns off almost immediately.
    I have tried to change the resistor (1M) to smaller ones (10K) and changed the capacitor to bigger ones (2200 uF). It helps but still the LED is lit less than 1 min. My LED is a warm white LED.
    Do I need to include a timer circuit like the 4060 IC to have the LED lit for 2-3 minutes?
    I have also tried to change the voltage from 3 to 4.5 V. Same result.
    I am impressed that the distance is more than 5 meters with a TV-remote controller.
    Now is it possible to change the circuit to react on a certain button to turn on the white LED and another button to turn on a red LED?
    Again thank you very much for all your great circuits. It is really a pleasure to build your circuits. They work and you schematics are much easier to read than most other.

    Reply
    • Swagatam says

      Thanks Henriks,

      THe 1M resistor is also directly responsible for generating the time delay, reducing it to 10K will drastically affect the time delay, on the contrary increasing it will ensure longer time delays.

      Try 1M and you will see much difference in the time interval for which the LEd stays ON.

      4060 is a classic timer IC and it can be used for advanced timer applications, so you can always try it out for enhanced ejects.

      Reply
  17. raj says

    Thanks for your reply,

    Is this CIRCUIT is not work for LED Lantern? If not What changes should i do.

    Reply
    • Swagatam says

      please explain your application in detail…

      Reply
    • Swagatam says

      …..no the above circuit is not for remote ON/OFF toggling operations…

      Reply
  18. Sherwin Baptista says

    Dear,
    Suppose the above said circuit described by you is used to work the moment button pressed by the remote, the rc time is say 2min mean the light will glow until rc time elapses.
    But can the circuit be switched off in between by pressing the remote button once again?

    Reply
    • Swagatam says

      Dear Sherwin,

      the above circuit has been designed as per the mentioned request, it's timer based and will not switch off with the remote control signal.

      Reply
  19. Sherwin Baptista says

    Dear, one more thing,
    Input signal to tsop1738 should be exact 38KHz or if there is few khz more or less will it not work??

    Reply
    • Swagatam says

      a TV remote will have this frequency in its signals.

      Reply
  20. Sherwin Baptista says

    Ok,
    To control a relay from the above circuit, and using 6v to power the circuit
    could i use mje3055 and mje2955 transistors in place of above to-92 npn and pnp types.
    should i change 1n4148 to 1n4007??
    what is the best and accurate way of controlling the delay time of connected load,
    any further component changes by any chance??
    I will build this in coming days time,
    so please help me.

    Thanks.

    Reply
    • Swagatam says

      The shown BC547 will be able to handle a small relay easily, so no need of changing it, if the relay has higher coil current in that case a 8050 or a 2N2222 can be tried in place of BC547

      Reply
  21. manjunath says

    sir, how can i modify this circuit to run led light contieously until switch off with remote
    thank you sir

    Reply
    • Swagatam says

      Manjunath, the above circuit is designed to run continuously until switched OFF with the remote handset.

      Reply
    • Swagatam says

      sorry, No, the above circuit will do the opposite actually, for implementing your application the circuit will need to be changed entirely …using a latch configuration.

      Reply
  22. manjunath says

    sir in above circuit was both transistors are BC547
    1) bc547 npn
    2) bc 547 pnp
    was this right sir

    Reply
  23. manjunath says

    Really sorry sir I didn't refer image properly.
    The transistor is bc547 npn and Bc557. Pnp
    again sorry
    and thank you very much for your cooool answers

    Reply
    • Swagatam says

      OK manjunath, no problems!

      Reply
  24. manjunath says

    Sir does any IR reciver works as usual . Or should i use only TSOP1738 .
    now I had used simply an IR reciver it does not contain any number. But not working.

    Reply
    • Swagatam says

      any 3-pin type IR sensor might work, however TSOP series sensors would be more appropriate for perfect operation.

      Reply
  25. manjunath says

    Sir as I switching on the circuit. LED glows. if I operate remote slightly LED blinks that's all it won't switch off.
    Thank you sir

    Reply
    • Swagatam says

      Manjunath, which circuit are you referring to? please explain how you have build it

      Reply
  26. manjunath says

    sir , my above question was about
    Remote Controlled Night Lamp Circuit with Timer circuit
    thank you.

    Reply
    • Swagatam says

      remove the TSOP and then switch on the circuit and check the LED response, keep the 1K, 1M, and 100uF disconnected from the ground when you switch ON power.

      The LED should not switch ON…..now just momentarily touch and remove the 1K, 1M, 100uF junction to ground….now the LED should illuminate and then shut off after sometime.

      confirm the above first.

      Reply
  27. manjunath says

    sir, if i wrong connected the transistor,or tsop or any IC's in any other circuits would damage that perticular components or any other related Components .
    and that wrong connected components can be reused or reconnected or waste.
    * sir but in this circuit ( Remote Controlled Night Lamp Circuit with Timer circuit ). I need pinout diagram of both bc557 and bc547 . that i confused to connect.

    Reply
    • Swagatam says

      yes it can definitely damage or destroy the particular component, and once damaged it will need to be thrown of, can never be used again.

      for BC547/557, the right hand side pin is the emitter, center pin is the base and the left side is the collector….keep the transistor printed side facing you and its pins downward while confirming this.

      Reply
  28. manjunath says

    Sir I changed all components that had wrong connected except IR sensor and rebuild circuit. Now it led glows as soon I switched on circuit.
    And if remote operates led switchs off for 3 to 4 seconds and then glows.
    Was this malfunction may be due to IR sensor . Or other.
    Thank you very much.

    Reply
    • Swagatam says

      manjunath, the LED should not glow when switched ON…check the circuit first by removing the sensor, that is without connecting the sensor…..

      Reply
  29. manjunath says

    On the day of "GURUPOORNIMA"
    guru swagatam sir ko pranaam.

    Reply
    • Swagatam says

      thank you shishya Manjunath!

      Reply
  30. manjunath says

    sir
    Any method to find out the , negetive,positive,and out terminals of any IR sensor's with multimeter or any method
    thank you sir

    Reply
    • Swagatam says

      No, there's no way of identifying through a meter or any other similar method….you'll have to refer to its datasheet for the details.

      Reply
    • manjunath says

      Sir I made another circuit of Remote Controlled Night Lamp Circuit with Timer circuit
      I works but the LED glows only for 2 second s
      so I changed 1m resistor to 4.7 k and capacitor to 1000uf but now LED glows for 3 to 4 seconds only and if I keep pressed
      remote button for while LED will glows little more time. What may be the fault sir
      and also the ir sensor which I have with name mentioned at top "vire" 1= out 2=ground 3= VCC.
      Thank you sir.

      Reply
    • Swagatam says

      Manjunath, increase the value of the resistor, because the value is directly proportional to the delay period, try a 100k resistor.

      I'll try to update a modified design soon, which will be able to produce better results.

      Reply
    • manjunath says

      Ok thank you sir

      Reply
    • manjunath says

      sir I had changed resistor value by 100k.
      but now also the LED glows for 1 or 2 more seconds as earlyer
      sir please modifie design
      thank you

      Reply
    • Swagatam says

      manjunath, please make the following circuit first:

      https://www.homemade-circuits.com/2014/11/long-duration-timer-circuit-using.html

      replace the relay with a LED/resistor.

      replace the push switch with the emitter/collector of a BC557 transistor (emitter to positive)

      connect the base with the out pin of the IR sensor via a 220 ohm resistor….rest you know how to proceed

      Reply
    • manjunath says

      Sir,
      Replacing push switch mean should I join another bc557 in the place of push switch.
      And replacing relay with led with resistor was resistor value may be 220 ohms .
      Thank you very much.

      Reply
    • Swagatam says

      yes replace the switch points with a another BC557 emitter/collector

      yes resistor 220 ohm will do

      Reply
    • manjunath says

      sir
      i feel sorry to disturb you again and again.
      i made the circuit (https://www.homemade-circuits.com/2014/11/long-duration-timer-circuit-using.html)
      but i fail to be success. the IR sensor got hot, that means i had wrong connected. sir please can i expect modified diagram of this circuit.
      actually i had repalced switch with bc557 (emitter to positive, base to IR out with resistor. and connector to negetive) and the capacitor stage that i had confused but i connected to positive side of capacitor to junction bc557 emitter and 12v positive, and negetive to junction of bc547 emitter,led negetive.
      thank you very much sir

      Reply
    • Swagatam says

      manjunath, I have posted the updated design, please check it out…

      Reply
    • manjunath says

      Thank you very much sir.

      Reply
    • manjunath says

      Sir
      In updated design circuit
      Which is out , positive and negative of IR sensor
      Thank you.

      Reply
    • Swagatam says

      the center one is the output…upper one is the positive, and the lower one is the negative.

      Reply
  31. john kg says

    good day sir
    in the modified diagram supply voltage shown is 12v . do i need to use 7805 ic to feed 5v to tsop or can i connect 12v directlypls advice
    john

    Reply
    • Swagatam says

      John, I forgot to connect a 7805 for the sensor…it must be included for the sensor module.

      Reply

Primary Sidebar

Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (53)
  • 4060 IC Circuits (25)
  • 555 IC Circuits (98)
  • 741 IC Circuits (19)
  • Amplifiers (58)
  • Arduino Engineering Projects (82)
  • Audio Projects (94)
  • Battery Chargers (82)
  • Car and Motorcycle (94)
  • Datasheets (46)
  • Decorative Lighting (Diwali, Christmas) (33)
  • DIY LED Projects (89)
  • Electronic Components (97)
  • Electronic Devices and Circuit Theory (35)
  • Electronics Tutorial (109)
  • Fish Aquarium (5)
  • Free Energy (35)
  • Fun Projects (11)
  • GSM Projects (9)
  • Health Related (18)
  • Heater Controllers (28)
  • Home Electrical Circuits (101)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (63)
  • Mini Projects (171)
  • Motor Controller (66)
  • MPPT (7)
  • Oscillator Circuits (24)
  • PIR (Passive Infrared) (8)
  • Power Electronics (33)
  • Power Supply Circuits (74)
  • Radio Circuits (9)
  • Remote Control (47)
  • Security and Alarm (61)
  • Sensors and Detectors (116)
  • SG3525 IC (5)
  • Simple Circuits (74)
  • SMPS (29)
  • Solar Controllers (61)
  • Timer and Delay Relay (54)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (40)
  • Ultrasonic Projects (14)
  • Water Level Controller (45)

Circuit Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

Facebook
Twitter
YouTube
Instagram
My Facebook-Page
Quora

© 2022 · Swagatam Innovations

We use cookies on our website to give you the best experience.
Cookie settingsAccept All
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Please visit the Privacy Policy Page for more info.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Non-necessary
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
SAVE & ACCEPT