Presented circuit diagram is of RF remote control switch. This
remote control switch allows up to four electrical appliances to be turned on
and off.
The biggest feature of the RF remote control switch is that it does not
traditionally require the remote to be placed in front of the appliance to
turn it on or off as it works on RF frequency. The radio frequency ranges
from 30 KHz to 300 MHz.
RF module ASK modulation is used in this system. ASK modulation
(Aptitude Shift Keying). Radio frequency remote is better than ir remote
because the range of RF remote is much better than ir remote. The range
of RF remote is about 30 to 100 meters.
You can use this remote from any corner of the house. With this remote
control, you can turn on/off electrical appliances from any corner of the
house.
This project is divided into two section transmitter circuit and receiver
circuit.
Rf transmitter circuit
The RF remote control transmitter section circuit diagram is given below.The
main components used in the transmitter circuit are HT12E ancoder and RF
transmitter module 433MHz.
Rf remote transmitter circuit diagram
Apart from this, five resistors, one capacitor and four push buttons have also
been used in this circuit.
The IC HT12E in the circuit converts the parallel data into serial.
The main component in this circuit is the RF transmitter module which
converts the signals received from the ic into radio frequency and transmits
it over the air.
Rf remote control receiver circuit
The main components used in the RF remote control receiver section is the RF
receiver module 433MHz and ic HT12D. Apart from this, a capacitor, an
LED and two resistors have also been used in this circuit.
The main component in the receiver section of the RF remote control is the
RF frequency receiver, which converts the signals received from the RF
transmitter module into electrical signals and provides to the IC HT12D.
HT12D is a decoder ic that decodes the signals received from the RF
receiver.
Rf remote receiver circuit
By connecting transistor and relay to the data output pin of ic HT12D, you
can use it as a switch. The list of all the electrical components used
in the circuit is given below.
Rf remote transmitter components list
ic
HT12E
RF transmitter module
433MHz
Capacitor
C1 o.o1uf
Resistance
R1,R2,R3,R4 1K ohm
R5 1M ohm
4 push button
Antenna wire
Rf remote receiver components list
ic
HT12D
Rf receiver module 433MHz
Capacitor
C1 o.o1uf
Resistance
R1 330ohm
R2 1M ohm
LED light
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