Wireless switch using 434MHz ASK modules

            If you want to design a remote control using RF method then this circuit suitable for you, here we used 434MHz ASK (Amplitude Shift Keying) transmitter and receiver module to transmit and receive RF signal.




Circuit diagram
ASK Transmitter circuit

ASK-Transmitter

ASK Receiver circuit

ASK-Receiver-new

The encoder (HT12E) and decoder (HT12D) used for unique purpose of sending key data and Receiving the key data.
The encoder can code the information of N address bits and 12 data bits, each one deals with two logic states, by the same decoder decodes the received signal from ASK receiver and give proper logic state at the output pins.

ASK Transmitter module

ASK-434-Mhz

ASK Receiver module

433-ask-tx-rx

Components List

S.No Name Quantity
1. ASK 434MHz transmitter and Receiver module 1
2. IC HT12E
IC HT12D
1
1
3. Resistor 1.1MΩ,5KΩ,10KΩ,470Ω each 1
4. LED 1
5. Transistor BC 548 npn 1

Data sheet You can get IC HT12E data sheet here…
                      You can get IC HT12D data sheet here…

 



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