rf tranceiver 433Mhz

Discussion in 'Wireless & RF Design' started by Bhagyashree5, Sep 14, 2013.

  1. Bhagyashree5

    Thread Starter New Member

    Sep 14, 2013
    Hello everyone,

    I wish to use a rf transceiver (433Mhz) module to turn ON/OFF lights, and i wish to do this using Atmega32 micro-controller. I am new to RF so I really need help. I am unable to figure out how to start with it.
    Can anyone please guide me, please help me out friends, it would be a great help...
  2. sirch2

    Senior Member

    Jan 21, 2013
    I bought some cheap transmitter/receiver modules off ebay for an Arduino based project recently and they were not very good, so I went with these:


    There are a few things to note with these. Firstly they are a transmitter-receiver pair so only one way comms but I guess that is enough to turn lights on/off.

    Secondly, when the transmitter stops transmitting the AGC on the receiver ramps up and it picks up a lot of noise so you need to have some sort of recognizable "protocol" so that the receiver can tell signal from noise. For a protocol I used a train of pulses at 5kHz that ended with two double-length pulses, which worked well enough.

    Obviously transceivers are available but I have no experience...
  3. Jibby

    New Member

    Sep 12, 2013
    Use encoder IC HT12E at the transmitter and HT12D at the receiver to interface the 433 MHz pair to the microcontroller.