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Subject: Need help to design Alarm sensors circuit using microntroller and telephon line

Date: 06/20/02 at 1:48 AM
Posted by: LAKSHMAN
E-mail: lakshman_79@rediffmial.com
Message Posted:

In Reply to: Re: Need help to implement and design Alarm sensors circuit using microntroller and telephon line posted by Jem on 02/08/02 at 4:59 PM:

In this project I tried to make the remote access by telephone. The computer (microcontroller 8051 or AVR )is used to control the interface between user and system. The controller can be accessed close or open an appliances and Check an alarm status. The alarm system composes of Heat Detectors Smoke Detectors and Door Magnatic Switchs. When the alarm system is activated, the controller will dial telephone to the programmed number to inform alarms.
Any help in a part of this project is needed and will appreciated...
with my thanks on advance.
Note: I also need a schematic or A discription of how the phone dialing system. "cause I will inteface the system with the telephone line to send the programmed number from the pc to the phone and then auto dial it "


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