"Mr Sandman" wrote in message
news:WcSdnQ1Etp-cdZnVnZ2dnUVZ8qSnnZ2d@plusnet...
Hi all,

its been a while since I played with electronics, so could do with some
advice.

I have 2 magnetic door locks, keypad operated to control access into my
house. I also have a mains power smoke alarm system.

what I want to do is use a relay operated by the smoke alarm when sounding
to turn off the mag locks to allow people to leave with out having to get
their fobs out.

Mmm. So to break into your house, I stick a smoke bomb in and I can open the
doors?

cheers,
clive