door entry linked to TV

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Binky if there's no cheap way what about a simple CCTV camera linked to the TV and if she likes the look of them she can go and open the door!

 
There are some cheap diy "cctv" kits that connect via scart and trigger pin 8 to in pause the record on a video recorder, what if you connect one of these to AV1 on the tv - it'll then over ride any other input.

 
Don't forget that if you knock one up - I would like to see before, during and after pics of it. ;)

 

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