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Need help with burglar alarm for a model house.

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hmmm....the only constraints other than what i hav explained is it has to be run off a microcontroller.
 
You could make it respond to multiple codes, so that you can hand out different codes to different realtors. It logs the codes. The purpose being that if someone hands their code out and an incident occurs, you know which realtor is responsible.

You could also do an SMS link, you call the owner and they'll send a message to unlock the door for you. Of course the owner must be available (cell phones are a good thing). You could set it up so that the owner can send a message that it should unlock for a limited period of time too, basically you set up an appointment to show up there between 2 and 4pm and he sets it so "159" will unlock it during that period.

In fact you don't necessarily need a communication link. It could keep time and all codes are calculated from a seed. So he could type the time they want into his computer and say, "ok, 856 will open it between 2 and 4pm".
 
Eh Rancid Rock,
Check out that sms controller project that siliconchip did awhile ago. It would be easy to hide the controller board and wire up the doors via relays then you could simply send an sms message from your phone to open any door you've hooked up. This kit is avaliable from jaycar off memory and sounds just the thing for your project.

Cheers Bryan :D
 
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