In Reply to: Re: how to design security system using microcontroller and telephone line posted by Michael Sprayberry on 08/25/02 at 4:10 PM:
At first, i am very appreciate because the response that you gave.Thank you.
The thing that i want you help me is,the design of circuit for security system.It include the design of circuit for connect between sensor, microcontroller(68HC11),and alarm system.The alarm system consist a siren and auto dialler.The auto dialler will connected to the telephone line.When the sensor trigger it will send a signal to the microcontroller and then the microcontroller will send a signal to the alarm system to activated it(a siren will make noise and auto dialler will make an automatic dialler). I am also want you show me a programming base on the operation of the system.
Thank you for your cooperation.