In this project, let’s build a simple Remote controlled switch for appliance controlling. If you know basic concepts of electronics, this circuit is pretty easy to build and test. The core of this circuit are two IC’s – which are infra red sensor IC’s – TSOP 1738. A couple of transistors and associated components complete the circuit – which is affordable for any hobbyist/student.
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 .
* 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:
hello sir what is value of capister c5 and c1 please conferm me
Hello Seetharaman what is, Positive fail safe switching
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.
sir, How to make this circuit 4 channel or more because there is CD4017 and CD4017 is many out put…?
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
You can use the latest S8050
sir i want to simulate this circuit n try on bread n pcb too…..plz help me for the same….
Pls sir were can i connect the appliance plug
Use C & NO contact in series with the live wire connecting to the load. (using C & NO contact as an on/off switch)
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
will u plz help me in knowing about dis project
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
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.
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Can the remote controller also be used to turn a geyser on and off?
Hey would u pls help me plsss…. My circiut is not working.a led is on.plshelp me
in above circuit can u please explain the importance of zener diode & relay at that point..plzz help me out
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?
hello sir.How can i turn on fan using remote control . pls give me a simple circuit .
Sir can i use LS74109 instead of CD74109 for the remote control for home appliances.plz reply to email.my email firstname.lastname@example.org
Sir can i use LS74109 instead of CD74109.plz reply to email.my email is email@example.com
I am assemble on general purposes PCB bit it automatically toggle On and off after some time Please give me solution.
i need a cheap and fine remote controle circuit kit
Pls write the voltages of all the capacitors (c1 to c5) and the watts of all the resistors. Thanks
Yes it’s possible! One more thing, make a suitable Power supply with this circuit. Use 7806 to regulate voltage. I refer you circuits under this page
i want to connect this circuit to my fan and operate with remote is it possible are not if so how??
Amazing circuit…..a giant thanks to circuits today. My circuit worked on first attempt, i m so happy…thanks a lot….
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.
I want remote operated audio amplifier volum control circuit diagram
Hi their cant find Sl 100 any alternative!! thx
give me full seminar report for this topic
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.
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…..
Hi Arifuddin Sheik a nice blog. Your circuit 2 is quite simple. you have explained about the above circuit also nicely. yes NE555 is added for positive fail safe switching. your idea of using delay with acapacitor without the use of NE555 is also good. keep it up. thanks for your comments. readers can visit his blog on the following address. useful informations.
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
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.
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…??
GREAT its working……….
it is working guys. but you need little tweaking. becarefull with connections and transistor pins.
I need a multichannel remote controller and switch driver circuit. anyone help me.
plz reply . is it working 100 % , my mail firstname.lastname@example.org
plz reply , is it working 100% , anybody made this ?
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 email@example.com
plz use a 7805 ic instead of zener diode
i need to know about the details of ic CD4017.how it is working as a flipflop?
is it working correctly plzzz give me reply…….
the ic2 mentioned here is the CD4017, this is a decoded counter, could you please explain how it can work as a flipflop?
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.