Using RF to send/receive wireless signal

Discussion in 'Wireless & RF Design' started by aaronrocks2, Jul 16, 2013.

  1. aaronrocks2

    Thread Starter New Member

    Jul 16, 2013
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    Hi Guys,

    I am looking for a low cost wireless RF solution to send 0V/5V indicating open/close. Basically I want to do this, send +5/0V-> Transmitter -> Receiver->

    How can i do this? I dont want to use off the shelf products but integrate a RF transmitter/receiver chip into my existing PCB schematic. Please help.

    Regards,
    Aaron
     
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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    433MHz transmitters and receivers are dirt cheap. But they're designed to send data very slowly not be continuously on. Does your project have a microcontroller with a free data pin?
     
  3. MrChips

    Moderator

    Oct 2, 2009
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  4. aaronrocks2

    Thread Starter New Member

    Jul 16, 2013
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    Hey Bill, Thanks for the reply.

    Yes my project does have a microcontroller with free data pins. What you thinking?
     
  5. aaronrocks2

    Thread Starter New Member

    Jul 16, 2013
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    Thanks MrChips!
     
  6. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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  7. aaronrocks2

    Thread Starter New Member

    Jul 16, 2013
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    great. ill check that out!
     
  8. Gadersd

    Member

    Dec 8, 2012
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    Anyone have schematics of those cheap rf modules? I would enjoy building them from semiconductors.
     
  9. aaronrocks2

    Thread Starter New Member

    Jul 16, 2013
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    that would be cool. Anybody out there have schematics??
     
  10. Papabravo

    Expert

    Feb 24, 2006
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    Building RF circuits for the unlicensed ISM bands is challenging in terms of component selection, board layout, and debugging. It is hard to get reliable and consistent results on a breadboard. You will get there faster by getting an amateur radio license and starting with lower frequency circuits in the 1.8 to 14.350 MHz. range. VHF and UHF will come later, but be prepared to open your wallet to play in that pond.

    Schematics - ARRL Handbook and associated publications.
     
  11. nerdegutta

    Moderator

    Dec 15, 2009
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    Something like this:

    [​IMG]
     
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