How do I make an automatic dog door?

The wife is getting a job that will not allow her to let the chahuahua
out at noon. Is there a schematic that I can use to make an RF auto
open/close dog door?

Thank you,
Rick

 

I have a nice dog door for my small dog. It has flaps on both sides, which
appears to discourage nocturnal intruders, and a plastic safety cover just
in case you don't trust it. It installs through a typical exterior wall,
and took me about 2 hours to put in (a friend had a nice stucco saw).

It was a few years ago, but I believe this was the one:

http://tinyurl.com/9g46e

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Regards,
Bob Monsen

Strange as it may seem, the power of mathematics rests on its evasion of all
unnecessary thought, and on its wonderful saving of mental operations.
- Ernst Mach

 

Garage door opener on an ordinary mains voltage timer.

Or electric door lock on mains voltage timer.

R

 

http://www.drsfostersmith.com/produ...&Ntx=mode+matchallpartial&Np=1&pc=1&N=0&Nty=1

This one uses infra-red. The collar device has a specific code to open
the door.