Telephone Auto Dialler

This Circuit is used to dial a phone number automatically using a PIC microcontroller and DTMF Transciever MT8880.
It can be used as a security system in home or it can be used for industrial applicaions also.
The DTMF(Dual Tone Multi Frequency) output from the MT8880 is connected to an Line matching transformer and
the other end of the transformer is connected to the telephone line.

Once the microcontroller gets high input in an i/o it automaticaly dial the phone number which is stored in the flash memory. u can change any number. U can change the code to suit your application.