:: The closest I ever came was thinking about using an
:: implanted microchip as authentication for the cat door.

I considered that, but came up with the same problem - moggy being 
chased by a ' how dare you cross my path type moggy' requires the flap 
to be openable a little while before pet moggy slams into the flap.

So I gave up as I didn't want to power the pussy.

5 metres though should be plenty, if only I knew how fast my fat thing 
can run (which considering he's 7kg is surprisingly fast)

Colin
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cdb, colin@btech-online.co.uk on 4/07/2009
 
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