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Subject: how to design security system using microcontroller and telephone line

Date: 07/01/02 at 3:59 AM
Posted by: mohd ariffanan mohd basri
E-mail: anaffira@yahoo.com
Message Posted:

In this project I tried to make the remote access by telephone. The computer (microcontroller 68HC11)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 Magnetic Switchs. When the alarm system is activated, the controller will dial telephone automatically 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/circuit diagram,proggramming or A discription of how the phone dialing system. "cause I will interface the system with the telephone line to send the programmed number from the microcontroller to the phone and then auto dial it "

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