Originally Posted By: rob
I'm going to try to knock up an Imp connected RFID cat flap to see how well it works in practice (keeping in mind this stuff is pre-alpha right now).

Blogging it here:

http://fenconsultants.com/blog/

So.. that cat flap thing. It looks like a one-way portal (diode).
Does one need to install two of them for a cat to be able to come and go as cats are wont to do ?