RFID closed

This is a project that never quite got finished. The goal was to make a dog door for my dogs that would unlock only for them and not other dogs, skunks, coyotes, etc. So I built an RFID reader that could detect a tiny tag on the dogs' collars as they approach and unlock the door for them. Problem is, I could never get enough range out of it to be practical. I got about eight inches and I want 2-3 feet. The RFID chip is very sensitive to the resistance and impedance of the antenna (wrong values can even damage it), so changing the antenna myself without knowing a lot more about RF engineering than I do is impractical.

Bius, Thor and 4 more people faved this
  • matt hannah 10y

    Wow you are a brilliant person. I wish I had the skills to do something like that, even if you didn't finish it
  • _escalade328s_ 10y

    that is genious. you could sell this for a fortune. you should go patent the idea, someone will steal something so brilliant.
  • Andrew Magill 10y

    Thanks! Unfortunately this has been done. A company (now bankrupt, I believe) used to sell a system just like this, plus the door and locking mechanism and everything.
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Taken on August 17, 2005
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