# Remote Control Light Circuit Diagram Using 555 Timer

You may wonder if it’s possible to control a light using a remote controller. In this article CircuitsGallery presents an interesting DIY circuit that helps you to turn ON and OFF a lamp with a remote control.

Here we have made use of TSOP, an IR receiver which detects the IR rays from the remote. NE555 is the next important part which produces a clock pulse for toggling the D flip flop.The relay helps to connect any electrical devices to the circuit and you can control any electrical equipment, not only a light.

You must need regulated power supply of 5 volt to do this circuit because TSOP requires 5v. Its voltage should not exceed 5V.

You can use normal remote control of home appliances for this and of course I meant the one with Infra Red transmitter. Or else if you’re interested to make one of your own then it’s simple, just have a look at our simple IR transmitter and receiver circuit.

## Circuit Diagram of Remote Control Light

Click on the image for enlarged view

## Components Required

1. 230v to 6v step down transformer
2. 7805 voltage regulator
4. IC 555
5. IC 7474
6. BC 187 Transistor
7. Diode 1N4007x5
8. Resistors (220KΩ, 100Ω)
9. Relay (6V)
10. Capacitor (1μF, 470μF)

## Working of Remote Control Light Switch

• Power supply circuit is not shown here. 1st you build a Rectifier circuit for 6v DC and proceed.
• Maximum voltage of TSOP and 7474 is 5V hence we are using 7805 voltage regulator IC to get constant 5V DC.
• The output of TSOP is always 5V, and the output will be zero when IR rays strikes on it.
• 555 IC biased as a Monostable Multivibrator. Normally its output is 0V (ground potential), provided that voltage at the 2nd pin must be greater than 1/3Vcc.
• When the voltage at the 2nd pin goes below 1/3Vcc output switches to high (5V) for the time T=1.1RC after the time interval output returns to 0V again.
• The D-flip flop7474 is wired as Toggle mode, i.e. Q’ to D input. 555 used as clock generator to the flip flop.
• When it get a clock pulse Output goes to High and remain in that state until it get next pulse.
• On receiving next pulse output goes to low and remain in that state till the next pulse.
• This process will continue.
• Output of 7474 is fed to base terminal of BC 187 which is driver transistor, when it base voltage is high current will flow through the load
• Here relay is the load and it will energize only when the base voltage of BC 187 is high and connects the 230v AC supply to the Bulb or light.

(Read More: How to Connect relay in circuit)

• Diode Df is freewheeling diode used to dissipate the stored energy in the inductor load. It is essential for the smooth working of this circuit

## 126 thoughts on “Remote Control Light Circuit Diagram Using 555 Timer”

1. Anonymous says:

is there a circuit diagram for remote control of remote control light?

Yes we have already published that.

• imran says:

Can we use 7473 instead 7474. if yes what are the changes in the connections. Thank you in advance.

• Ganesh says:

Is there a circuit for 4 way remot controlled switch

• vinoj says:

Hai dear …. I want know about remote controlled switch. this switch need control by push switch (micro switch or any contact) and remote control. Can I get this circuit diagram..pleas …
Thankyou

i make this ckt but some problem is occurs that problem is when any light is drops on sensor(TSOP1738) relay operates continuous automatically. what is the solution.

2. in ic 7474 we must gice connections for VCC and GND plz tell it

• It’s clearly given there in the circuit diagram i.e. 7th pin-Ground and 14th pin-Vcc(+5V)

3. kartik says:

• Hi Kartik,
You can use any TV or CD player remote control for the purpose, we will publish the IR transmitter circuit of different types soon. Keep visiting

4. Anonymous says:

• We will add it soon.

5. alyafatin says:

is there any circuit diagrams about auto lock toilet system?

6. wasee says:

nice projectzzzz

7. Purushottam mishra says:

Dear sir i have no more knowledge about electronics but…but i am taking intrest learn it..so plz help me.i want to build circuit remot control light,,,there for i see your daigram….but howw to build i remote…who remot working with this circuit….please sir help me

• Khaleel says:

Hi Purushottam,
No need to worry, you can use any IR remote with this circuit, let it be TV or DVD player remote controller. Also we can help you to make your own remote controller from here. Visit IR remote controller circuit

8. mustafa kamal says:

whats the block diagram of this project

9. jebin marjith says:

10. Josh says:

Hi! Cool project.
But I have a question. My circuit isn’t working. And through testing, I found out that my TSOP output voltage only goes to 3 V after it receives an IR signal. What can I do to solve this problem? Please help me.

• Jaseem vp says:

Hi Josh,
Most probably your TSOP may defective. Please try to change it. Let me know your progress also.

• Josh says:

I’ve replaced my TSOP but the circuit still does not work. Could it be because I used a 2N3906 transistor instead of a BC187?

• Sandra peters says:

Good day sir, I need you to help with a circuit diagram for three- way remote controlled lighting point

11. Ace says:

Hi! I just have something to clarify with you. BC 187 is a PNP transistor but the symbol on the circuit diagram is for an NPN transistor. Should I use a PNP or an NPN transistor for my circuit?

sir i have KT27S05 RELAY to use in this circuit please provide details of 8 pin to be connected in the circuit and how and where to connect 220v ac and bulb if possible give the circuit diagram in details.
thanks

13. PRAVESH AGRAWAL says:

I would like to know more about the freewheeling diode, and I have a Diode 1N4001 with me, will it be working with the relay like with Diode 1N4007 or circuit will create trouble.

14. PRAGRA says:

I connected an LED in place of the relay circuit, my output was the LED was blinking and the remote was doing nothing. Is there any problem in my connection.

• nawnit sen says:

there will be problem in your ic-555 circuit connection u check it again.it seems lik that ur ic-555 is working in astable mode(i.e; u r getting o/p from ic555 without application of any pulse. or There may be problem in TSOP change that.

15. ajay says:

Sir plzz add working video of this circuit

• PRAGRA says:

see properly there is a working video for this circuit they have placed

16. purva says:

Admin, I did not get the meaning of TSOP exactly in remote controlled lamp circuit.
Ya, I understand that it has three terminals Vs, GND, OUT. But what is that component exactly? Is that any IC? What should I call it when I will go to purchase in electronic shop?

• Yaseen says:

Hi Purva
Simply it’s an IR receiver module which has inbuilt IR receiver and demodulator. It produces demodulated active low output, you can call it as TSOP or IR receiver.

17. Nalaka says:

hi.
nice circuit. but U have some problem as I can’t find the BC187 Transistor what is the replacement IC for this. I am living is Sri Lanka. (Asia) please help me to fine the simile Transistor for BC187

Thank you,
Nalaka

18. SaNu says:

Hi sir ..,iam assembled this circuit..but it didn’t work.so plz help me…

19. saurabh says:

20. Abdul Haque says:

This diagram is not clearly .

21. RAJ mobli no 7503995897 says:

sir, i am make remote control switch and work properly , but when on/off inductive load this switch is running . i know how to protect electrical signal and light radition.

thanks n regards
RAJ

22. Ashok says:

Sir,when i connected the circuit the relay was continiously switching(it sounds ‘tic tic’), irrespective of the remote control.what was the problem tell me. Quickly. . . . . . .

• nawnit sen says:

there will be problem in your ic-555 circuit connection u check it again.it seems lik that ur ic-555 is working in astable mode(i.e; u r getting o/p from ic555 without application of any pulse. or There may be problem in TSOP change that u will get o/p.

can i use This to control fan……

• SHUBHAM CHOPRA says:

yes you can

24. bk nayak says:

• isabel says:

it is said tv or cd player remote as long as it has an infra red transmitter. wish it help.

25. alok says:

Can i use ir led receiver in place of tsop receiver if yes then what is new circuit diagram of ur project

• nawnit sen says:

yes u can but led reciver will not give you high o/p as TSOP. if o/p is considerable (not too much small volt) then circuit will work by simply replacing TSOP to led transistor .if it is not working then u’ll have to add a circuit consisting of comparator ic or jst lik a ir sensor circuit.

• nawnit sen says:

sorry there will be led reciver in place of led transistor.

26. isabel says:

i was wondering if i could used bc548 instead of bc187, or any suitable transistor for this circuit coz bc 187 couldn’t find at the market. please consider this thing.
thank you.

27. navdeep singh says:

i was wondering if i could used bc548 instead of bc187, or any suitable transistor for this circuit coz bc 187 couldn’t find at the market. please consider this thing.
thank you.

28. venkatesh says:

can we use the circuit without IC7474 by giving the IC555 output directly to 100ohm resistor

• nawnit sen says:

if u will do that it will on for few time only when u apply signal and after some tim it will automatically off

29. harihara sudhan says:

Can u tell what s mean by relay
And what type relay u had used in it

30. SHUBHAM CHOPRA says:

SIR, please explain me the connection of the bulb in the circuit?

31. muhindo morish john says:

what was the major problem solving for this project

32. kriss says:

Sir,when i connected the circuit the relay was continiously switching(it sounds ‘tic tic’), irrespective of the remote control.what was the problem tell me. Quickly. . . . . . .
i m having sme problem.,wat to do admin?

• nawnit sen says:

there will be problem in your ic-555 circuit connection u check it again.it seems lik that ur ic-555 is working in astable mode(i.e; u r getting o/p from ic555 without application of any pulse. or There may be problem in TSOP change that u will get o/p.

• shankar says:

i aslio suffering these problem

33. Amit Das says:

Can i use 5 volt relay in place of 6 volt relay. Can anyone Please mail me your answer immediately…. plzzz

• nawnit sen says:

of course u can .your relay voltage should be such that the u dc voltage i/p u are providing can drive relay .

this isn’t working 😮
where it would be wrong?

35. KawaiiLovah says:

Good day everyone..
Excuse me, I’m just a beginner in these types of projects.. My friend and I didn’t notice the 2nd circuit until we checked the video out.. so uhm.. would it still be ok if we don’t make the Pin Out Circuit? ;D

Coz if not.. we might have to find another project with 2 ICs, one as 555 timer and an operational amplifier.. in which I dun understand it yet.. >_<

36. san says:

I need to switch off something in 2 min …is there a circuit which can perform this function in low cost ..please let me know!!

37. Vasanthakumar. P says:

Hi sir
This circuit using multiple control. Any add new circuit.

38. Vasanthakumar. P says:

This circuit maximum taking current.

39. morish john says:

Hi I’ve assembled this circuit using bc 547 transistor bt my Tsop does not switch the lamp. What adjustments can i do to get the circuit work

40. morish john says:

What can use as an equivalent of 7474

41. rinesh says:

in the Circuit Diagram of Remote Control Light can you please show me the relay connection.
in which pin we can connect the 6v supply and which pin we can connect the transistor

42. rinesh says:

the Circuit Diagram of Remote Control Light TSOP and 7805 is heated
what is the reason for this

43. vinay mishra says:

i want variable on-off timer in same circuit digram. please sent circuit with parts name.

44. vinay mishra says:

hellow Alll of u
I want variable on-off timer both in one circuit digram. please sent any person circuit with parts name.

45. the circuit its not understandeable

46. jcksn says:

Light Circuit is not responding, are there any alternatives?

47. dominic says:

what will we use as a switch in the bulb ckt? it is not mention there

My circuit is not proper working…
Problem lamp on then few mint off not all time on plz solution

49. omkar says:

Sir, I can’t find bc187 in market. Could I use anything else to that

50. dk ghosh says:

Dear sir,
Could this circuit be useful for controlling the fan speed? Pl reply at the earliest.

51. rofina says:

Hai in my circuit 555 Is not working in monostable state , how Can i make it work in monostable state pls reply me quick

52. Pushkar Jog says:

Sir can we use ac187 instead of BC187 transistor

53. nzekwefranciso says:

Hey admin can u pls send me a step to step creation of this circuit in a video, i seem to have gotten confused. Ive done all my connection correctly down to d relay, but whenever i press my remote it doesnt seem to control d relay. I used a 9v battery

54. nzekwefranciso says:

Does this site really exist?

55. NIKHIL says:

is there any alternative to IC 7474?

56. Dilshan Fernando says:

Try 2N3906 instead of BC187 transistor

57. sai krishna says:

Should the terminal 5 of ic555 be connected to ground ?

Sir can i use 9v battery(step down to 5v) instead of rectifier circuit…?

59. nagendra says:

Sir,

How can you select the capacitor value & resistor values in the circuit.

60. bhushan says:

I want pcb layout for this schematic

61. anil says:

please give the connection of relay which is .related to this circuit .

62. bhushan says:

Where connect pin 5 of 555 ic and what is meanings the 14vcc;7gnd

63. shankar says:

ckt contineosly oN what is problem

64. Aniruddha Pal says:

I assemble this circuit… but the circuit is not working… I connect a led instead of relay.. but the led is blinking.. and the remote was doing nothing…
By the way.. where I connenct 470uf capacitor… as u declared in components required portion… plz hlp me…

65. cool_sanjay317 says:

Sir , can u provide the above component of remot control???

66. sahal muhd says:

please sir how can i make radio station….pls send it to my email

67. samim says:

my voltage regulator is giving out 4.65v. So what can i do for this

• Yaseen says:

Hi Samim
Apply 9V to input.

68. Tarun Kumar Gathwal says:

69. Abishek says:

I have only one question…..should the 14 pin of 7474 connected to the 6v supply????

70. Samiullah saif says:

Dear sir may i ask which rating of remote (transnitter ic rating)etc. ???

71. ramesh says:

why can’t we use DC suppy(6v battery)instead of unregulated DC supply(from bridge wave rectifier),,and you can avoid using voltage regulator also right?

72. Abshake says:

the bulb starts ON and OFF continuosly what will be the problem..and when i press the remote it wiill ON for sometimes and starts to on off again……..
And plzz tell me tehr use of diode in relay circuit

73. Abshake says:

when i place an led it is just blinking ON and OFF continuously what will be the problem plzz help

74. Nitesh kumar says:

Plzz give me proper diagram of relay and diode connection with transistor

75. Nitesh kumar says:

My circit is not working plz help

76. Narottam Gupta says:

Sir,
I made this circuit but one problem..
The relay is automatically turn off that means when I press the remote button then the relay is turned on but after a certain time it is automatically turned off. And the delay time is depend on the value of capacitor(if the capacitor is 10uF then it is delay about 3 sec. and if the capacitor is 100uF then it is delay about 25 sec.). But I want that it is running on untill I press the remote button again….

77. Arun says:

78. sneha says:

can i get ppt for this circuit and istead of light i need to add fan

79. Anil says:

Can you please send me how to do automatic school bell circuit and making process

80. Shaikh Awes says:

i want to add more devices like fan,bulb,cooler etc.
so how can i make circuit.

81. Rahul KATARIA says:

plzzzz tell me how much voltage riched from the collector of the transistor when the T-sop reciver is strick ON ?

82. samar says:

i didn’t understand the connection in Ic7474… Is pin 1 and 14 both are connected to vcc and 7 gnd?….and what about pin 5 of 555 timer

• sahal muhd says:

hello SAMAR….PIN ONE OF 7474 IS CLEAR…NO NEED TO USE IT…THAT IS WHY IS CONNECTED TO VCCC TO MAKE THE PLIP PLOP WORK PROPERLY. …AND PIN 5 OF NE555 is control volt….is no use for you

83. arun says:

I replaced led instead of relay, there is delay in on and off, can u give solution?

84. sheroz turk says:

Please tell me how to make clap switch

85. santosh says:

It is good but where is remote circuit

86. shankar says:

sir i have done the reciever connection but i could not get out put . led connected to pin 5 of the ic 7474 is continously showing on and off .out put is not getting

mail ur number to my email

87. sahibha says:

88. MD SOFIUR ROHAMAN says:

Nice project but 7474 ic is not available in market

89. sahal muhd says:

thank you man……please can I use a dvd tsop instead of yours….?

90. SUMESH V J says:

Thank u for the information.

• Khaleel says:

You are welcome Sumesh

91. The Ultra Man x204! says:

Dear sir, I want to use this circuit for my bike remote controlled “Turn Indicators” so I want to remove relay , transformer , and bulb but the circuit gets more complicated to solve pls help !!
Help me to make a curcuit of #Remote_cobtrolled_Turn_Indicators

92. kishore kumar says:

hi,

I want to replace my old switches to new remote control switches in my house pls help how to make this. I don’t no anything about this but, i want to do this. please mail me like spoon feeding to do this.

93. CYRIL says:

WHY IN THE COMPONENTS ITS WRITTEN
Diode 1N4007x5, WHEREAS IN THE CKT WE FIND ONLY ONE DIODE
Capacitor (1μF, 470μF),OUT OF THE TWO WHERE IS 470uF BEING USED IN THE CKT.

94. snehalata sahoo says:

sr sr where is the placement of 470 microfarad capacitor in this circuit board

95. chowdary says:

i tired for several times sirrr.and got irritation ,my ckt is donot workingggggg