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Author Topic: RFID Pet Feeder  (Read 2765 times)

gdemeny

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RFID Pet Feeder
« on: April 01, 2012, 11:55:21 PM »
IDEA:

I have two cats and one of them is on a special diet which made the other cat lose a lot of weight. So, I need a way to feed them different food and allow the skinny one to eat at any time. That's why I decided to build an RFID pet feeder.

WHAT WORKS:
  • Temporarily I'm using a gutted old CD-ROM drive to drive the lid. It opens the lid when skinny cat arrives and closes it when he leaves.
  • Arduino to control the CD-ROM drive. I wrote the code to control the lid and it fully works.
  • WiFly Shield so that the feeder can connect to a website. I have a bunch of ideas for settings/control via this site. I was able to make this work too. Right now it connects to my server and sends the MAC address of the WiFi card over and the server saves it into a database.
  • ID-20 RFID reader with a couple tags to test. I have code that polls for tags 4 times a second and works OK. The only problem is that the internal antenna only provides a reading distance of about 2".
  • Domain name for my server: http://www.smartfeeder.net
WHAT NEEDS TO BE DONE:
  • Antenna: this is what I'm currently working on and can make or break this project. I need to be able to get a reading distance of at least 6-8" for this project to succeed. Ted helped me with laser cutting a design I made for the structure that holds the coil and JB Zurn is helping me figuring out the exact number of turns I need to achieve the optimal frequency of 125kHz. Thank you both for your help!
  • Website: This is what I do for a living so most likely I will be able to handle this. :)
  • Enclosure: I have some basic ideas about the structure but I will definitely need help with designing this. Anybody has experience with enclosure design?
MAYBE LATER:
  • Lid mechanism: After all the above is done and I still have time, I'd like to come up with a mechanism for the lid that doesn't involve gutted CD-ROM drives and relies only on parts I can make/buy. This will most likely affect the enclosure design as well.
  • WiFi password input method: The last thing I'll have to figure out is how a user can tell the device what their WiFi password is. I have the following ideas:
    • use Bluetooth shield and build a mobile app
    • use LCD screen and a couple of buttons
    • use touch screen with on-screen keyboard
    • USB port connect to PC/Mac
    • a camera which can recognize QR code and a mobile app to generate it; also the website could generate it and could be printed
-George

daniel147

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Re: RFID Pet Feeder
« Reply #1 on: November 21, 2013, 02:39:55 AM »
Thank you for your detailed introduction. Here are QR Code generation control and QR Code reading library for creating and scanning QR Code barcode respectively.

ki4swy

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Re: RFID Pet Feeder
« Reply #2 on: November 21, 2013, 08:48:12 AM »
snag imagery illusions rfid pad stick it on the floor under a mat, and give your cats rfid implants near there feet :)
"Good engineers keep thick authoritative books on their shelf. Not for their own reference, but to throw at people who ask stupid questions. Hoping a small fragment of knowledge will osmotically transfer with each cranial impact." - eeguru

If it runs on electricity, i have it :)

lilycan

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Re: RFID Pet Feeder
« Reply #3 on: April 09, 2014, 02:45:37 AM »
Thank you for your detailed introduction. Here are QR Code generation control and QR Code reading control for creating and scanning QR Code barcode respectively.
thanks, does this barcode control support other barcode types like pdf 417
« Last Edit: April 09, 2014, 02:47:20 AM by lilycan »