Multi Receiver / single transmitter light control

Discussion in 'The Projects Forum' started by jbrowatzke, Dec 5, 2008.

  1. jbrowatzke

    Thread Starter New Member

    Dec 4, 2008
    Hello all,

    I am trying to design a system in which I use a transmitter with a microprocessor to transmit an RF signal on a specific frequency (the frequency and modulation don't matter) to multiple receiver's listening on the same frequency. I want to be able to use very simple receiver radios AM or FM doesn't matter to receive the signal and switch on a relay or even just pull a transistor high to use with switching.

    I was considering using DTMF to send codes over the RF signal and decoding them on the receiver. I am trying to avoid using micro-controllers in the receiver end so I just wanted to use a DIP switch and some sort of AND logic to compare the transmitted codes and the DIP switch.

    The receiver needs to be low cost as there is a very large margin here for theft as its for use with a public venue.

    I am open to suggestions

    Recap of project outline:
    • Microcontroller controlled (or possibly not) transmitter
    • RF (AM or FM or anything any freq)
    • Simple radio reciever (same freq as transmitter)
    • Reciever initiates a SSR or Relay
    • DTMF or any other encoding.
    • Low cost receiver
  2. hgmjr

    Retired Moderator

    Jan 28, 2005
    Have a look at the hardware on this website.

  3. jbrowatzke

    Thread Starter New Member

    Dec 4, 2008
    I have considered these module before, but even the cheap modules are approximatly $8 just for the reciever alone without decoder chip. I am considering making 20 - 25 of the remotes for the system and the budget is not very big, this is why I suggested using AM or FM and DTMF but like I said it was just a suggestion. I am still going to consider soe of these modules

    Best regards