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TV Remote controlled home appliance circuit with 555 timer


This is my first post and and this is the first circuit i made. There are many types of circuits for controlling home appliances using TV Remote. In fact I had confused a lot when I am a beginner searching for this type of circuits. The circuit here 555 timer IC to avoid fast switching. you can only switch the circuit after 3 seconds.
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.
The 555 timer is used to create a 3 sec delay for avoiding fast switching. You can also achieve this by using a high value capacitor across TSOP sensor. Click here to go view that circuit.

22 comments:

harshita said...

i have really got inspired by you,now i will also make this circuit in summer vacations

arifuddin said...

ok.. do it.. post your doubts if you have any.

Aneal said...

i tired this circuit in bread board but bad luck :( !!i don't know what is wrong with my circuit. Can u please mail me PCB design and Simulation file of this circuit. I would appreciate it. Thanks in advance.

sri said...

if another receiver using instead of using TSOP 1738 since here i didn't got that
receiver i connect that circuit on bread broad with another IR please reply

sri said...

if another receiver using instead of using TSOP 1738 what will happen since here i didn't got that
receiver i connect that circuit on bread broad with another IR i didnt got output please reply for details of ir receiverhappen since here i didn't got that
receiver i connect that circuit on bread broad with another IR i didnt got output please reply for details of ir receiver

Tittu said...

Very Nice and cool circuit.....

MY CIRCUITS 9

KMCTCE.blogspot.com said...

CRKT WORKS WELL,,YOU CAN USE ANY OF TSOP

Unknown said...

Awesome post i had a great experience of this Appliances its very easy to operate it and very helpful for my daily life
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Unknown said...

can you give me details of the relay used i am a bit confused over it. id is adityabhandari54@gmail.com

Unknown said...

can you give me details of the relay used i am a bit confused over it. id is adityabhandari54@gmail.com

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Visakhapatnam, Andhra Pradesh, India
I am graduate from Swarna Bharathi College of Engineering in Khammam, Andhra Pradesh, India. Currently I am doing a business. After seeing the response to my blog, I am planning to start my old electronics geek work again. Now I have got more funds and I am planning to do some creative projects. Thanks for all those who encouraged me for doing this wonderful job.