rf tranceiver 433Mhz

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

  1. Bhagyashree5

    Thread Starter New Member

    Sep 14, 2013
    1
    0
    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

    Well-Known Member

    Jan 21, 2013
    1,008
    351
    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:

    http://www.rapidonline.com/Electrical-Power/FM-Transmitter-receiver-modules-62075

    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
    15
    1
    Use encoder IC HT12E at the transmitter and HT12D at the receiver to interface the 433 MHz pair to the microcontroller.
     
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