Alarm Phone Dialer

  
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Just hook this Alarm Phone Dialer up to something you would like to monitor, for example, a high water alarm, low temperature alarm, back window, garage door, etc. When the system is activated it will call a number of programmed numbers to let you know the alarm has been activated. This would be great to get alerts of alarm conditions from your ho
Alarm Phone Dialer - schematic

me when you are at work. The microcontroller code is provided on the site. The circuit uses a MT8880 DTMF dialer chip and a PIC 16F84A microcontroller. If you don`t feel up to the challenge of building your own dialer you can always look to the professionals to monitor anything you like with a modern security system. After putting together this little device, you must enter programming-mode to learn some phone numbers which this module will call after detecting an input on it`s sensor pin. After programming just supply power to the device. After pressing the button Pokreni dojavu alarma  it will start to dial (tone or pulse, depending on the jumper setup). When the phone call is successfully established, the called party should press pound key #  to stop the device from calling another number or again. You should put a sensor instead of button Pokreni dojavu alarma . Programming the numbers 1. press the program  button 2. pick up the phone that is connected to the same phone-line as this device 3. punch-in first number and then *  key 4. punch-in then next number and then *  key 5. punch-in the rest of numbers, if more, and finalise with *#  (example: 061123123*061456456*#) Please note: The device will learn 64 characters/digits including * and # keys. 



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