4-receiver key finder project

Discussion in 'The Projects Forum' started by TAFelectronics, Apr 23, 2012.

  1. TAFelectronics

    Thread Starter New Member

    Apr 23, 2012
    1
    0
    Hi.
    I have a class where we were supposed to make some new product using electronics. Our group decided to make a key finding device that one can hook on to keys and small objects. We didn't really consider the possibility oif it already existing.
    Therefore, we decided to have 4 buttons on a transmitter, that each worked with a different receiver. Now, the way they communicate may be radio waves, or is there a different way of doing this wirelessly? Is there a single component able to do this radio/wireless communication? Thanks for all help in advance, any schematics for something like this would be amazing!

    -T
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,089
    3,027
    I'm pretty sure I've seen one of these. Reverse engineering can save a ton of time.

    You need to better define what you want to do. Range, battery size, etc. I think you might use garage door transmitter technology for the encoding, but that's just a speculation.
     
  3. MrChips

    Moderator

    Oct 2, 2009
    12,418
    3,355
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