RFID 2-3Ft Range

Hi all,

I'm looking for a RFID reader/tags that will activate from about 2 -3 feet away. I want to use this for access control for my dogs so when the dog with the appropriate reader gets about 2 feet from his/her food bowl a door will open, then when he/she gets further away it will close. This will keep one dog from stealing the other's food.

Thanks in advance for the suggestions.

None of the cheap available boards will meet your specification. You’ll need big antennas and quite some power to have an RFID powered in a range of about 1m. A solution might be an active tag but then a BLE based solution is much cheaper and easier to implement.

If you Google "RFID range" you will get a nice chart showing the type of RFID and the expected range of operation.