- DB9 serial connector goes here, so I can reprogram the microcontroller without having to take it apart and pull the chip out.
- Power
- Power switch
- Override switch
- Yellow - reading tag
Red - tag rejected
Greed - tag accepted
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.
Comments and faves
Scammah (94 months ago | reply)
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_ (94 months ago | reply)
that is genious. you could sell this for a fortune. you should go patent the idea, someone will steal something so brilliant.
AMagill (94 months ago | reply)
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.
BIUS, thor83, tlossen, jspaw, and 2 other people added this photo to their favorites.