AUTO ANSWERING WITH SECURITY DIAL-UP

AUTO ANSWERING WITH SECURITY DIAL-UP
This project is based on Atmel 89c51 Microcontroller . As name stands for, it works like an auto answering machine as well as security supervisor for your house or office. You can record 30 second message for answering, so whenever any incomming call comes, device will play your recorded message and disconnect the phone after the message is over. This features is there in all the auto-answering Machines.Microcontroller is also connected with two sensors, fire and inturder, an case if any of the sensor get triggered, it will trigger the emergency message stored into speech ic and diales out the previously stored number and deliver the emergency message. Device can dialout upto eight telephone numbers for pre deternined number of times. these numbers are stored at programming time and cannot be modified by the user. Since the speech ic used in this circuit has only 60 second recording storage ,we cannot take the incomming messages,as done in auto answering machine commercially available, uses 30 min cassette recorder & has enough storage to store incomming messages . we can add multtiple different types of sensors. cost will vary based on the number of sensors and no of telephone number storage.