TITLE:
Remote controlled home appliance
CIRCUIT:
COMPONENTS:
Resistors:
R1 : 220K
R2 : 330R
R3 : 1K
R4 : 330R
R5 : 47R
Capacitors:
C1 : 100uF-16V
C2 : 100nF-63V
C3 : 470uF-16V
Diodes:
D1 : 1N4007
D2 : Red LED
D3 : Green LED
Transistors:
Q1 : BC558
Q2 : BC548
IR : TSOP1738
IC1 : CD4017
Relay: 5V DC
DESCRIPTION:
- Here we have the simple circuit diagram of remote controlled home appliances.Connect this circuit to any of the appliances and you can turn them on or off.This circuit can be controlled using remote of any TV, VCR,DVD Player etc.The circuit can be activated from distance of 10 meters.
- Circuit description: The 38 kHz infrared ray generated by the remote control are received by the IR receiver module TSOP1738 of the receiver.Pin 1 of TSOP1738 is connected to ground and output is taken from pin 3. This output signal is amplified by by Q1. Output signal is fed to clock pin 14 of decade counter ic 4017 (IC 1).D2 glows to indicate that appliance is "off".
- The output of IC1 is taken from its pin 2. pin 2 is connected to D3 which indicates that appliance is on.Q2 connected to pin 2 of IC 1 drives relay.D1 acts as freewheeling diode.The appliance to be controlled is connected to pole of relay and neutral terminal of mains.It gets connected to live terminal of AC mains via normally opened (N / O) contact when relay energizes. If you want to operate DC 12 v then use regulated DC 12 v power supply and remember that circuit voltage should exceed more than 5 volts.
APPLICATION:
- Remote controlled fans, lights.
- Automatic breakfast maker/ coffee maker.
- Home automation.
