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.
16 comments:
i want to control 5 to 8 electric appliance ..what can i do pls help me..
Sir, I can't find 0.1uF ceramic capacitor so, can I use 0.1uF electrolytic capacitor or should I leave that component.
ok you can use electrolytic capacitor
sir, can I leave that component..
Sir, the relay turns on, but doesn't turns off... please assist me..
Do the LEDs work or not?
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..
i think there should be a problem with Q1 or Q2 did you change them?
i wat more details about this project....can u help me plz.....
where is the negative terminal??
Gnd is the negative terminal.
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?
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
This is the kind of products which people should buy. Amazing work of creativity.
Remote switch
Remote control system for lights and fans
I really like your blog and i'm waiting such type of your blogs which are helpful for us and if you want to know about washing machine prices then visit at samsung automatic washing machine.
I get an amazing information from your article and it has a power of words. Visit us if you want to get best kitchen appliances .