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Friday, September 04, 2009

Remote Operated Home Appliances Circuit

Here is the circuit diagram of Remote Operated Home Appliances or Remote controlled Home appliances. Connect this circuit to any of your home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD, VCR, Air Conditioner or DVD remote control. The circuit can be activated from up to 10 meters. It is very easy to build and can be assembled on a veroboard or a general-purpose PCB.











Parts:

R1 = 220K
R2 = 330R
R3 = 1K
R4 = 330R
R5 = 47R
C1 = 100uF-16V
C2 = 100nF-63V
C3 = 470uF-16V
D1 = 1N4007
D2 = Red LED
D3 = Green LED
Q1 = BC558
Q2 = BC548
IR = TSOP1738
IC1 = CD4017
RL1 = Relay 5V DC





The 38kHz infrared rays generated by the remote control are received by IR receiver module TSOP1738 of the circuit. Pin 1 of TSOP1738 is connected to ground, pin 2 is connected to the power supply through R5 and the output is taken from pin 3.
The output signal is amplified by Q1. The amplified signal is fed to clock pin 14 of decade counter IC CD4017 (IC1). Pin 8 of IC1 is grounded, pin 16 is connected to vcc and pin 3 is connected to D2 (Red LED), which glows to indicate that the appliance is ‘off.’ The output of IC1 is taken from its pin 2. D3 connected to pin 2 is used to indicate the ‘on’ state of the appliance. Q2 connected to pin 2 of IC1 drives relay RL1.
D1 acts as a freewheeling diode. The appliance to be controlled is connected between the pole of the relay and neutral terminal of mains. It gets connected to live terminal of AC mains via normally opened (N/O) contact when the relay energizes.
If you want to operate a DC 12 volt relay then use a regulated DC 12 volt power supply for DC 12 volt Relay and remember that the circuit voltage not be exceeded more than DC 5 volts.

15 comments:

James said...

I follow your blog for a long time and must tell you that your posts always prove to be of a high value and quality for readers. Keep it up.
Electrical Goods Manufacturer

saqib said...

i want to control 5 to 8 electric appliance ..what can i do pls help me..

Chetan M.P said...

Sir, I can't find 0.1uF ceramic capacitor so, can I use 0.1uF electrolytic capacitor or should I leave that component.

Zam said...

ok you can use electrolytic capacitor

Chetan M.P said...

sir, can I leave that component..

Chetan M.P said...

Sir, the relay turns on, but doesn't turns off... please assist me..

Zam said...

Do the LEDs work or not?

Chetan M.P said...

Sir, The LED's will work only when the relay is removed.
When the relay is connected to the diode D1, at first the diode D2 that is green led will glow and when the button is pressed from the remote the green light will turns on and the relay also turns on and it will stuck, when the key is again pressed the relay won't turns off and green led remains on..

Zam said...

i think there should be a problem with Q1 or Q2 did you change them?

Suresh Kumar said...

i wat more details about this project....can u help me plz.....

Franco said...

where is the negative terminal??

Zam said...

Gnd is the negative terminal.

Muthu said...

Intha boarda ethula connect pannanum? Enaku ithu mattum puriyavillai. Naan oru light ai eriya vaika allathu anaika intha remote ai payanpaduthukiren endraal, light ai intha board il connect pannanuma?

Jeff Taylor said...

I must admit, I’m really clueless when it comes to anything related to electronics. But I’d really love to have remote operated home appliances. If you’d be kind enough to show a simpler version of this, that’d be great. Thanks.

Sincerely,

Jeff of Appliances Online

Jasmine Jas said...

This is the kind of products which people should buy. Amazing work of creativity.


Remote switch

Remote control system for lights and fans

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