Dtmf Based Device Control

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aUTOMATED DEVICE CONTROL USING DTMF.

ABSTRACT
Now a day's every system is automated in order to face new challenges in the present day situation. Automated systems have less manual operations, so that the flexibility, reliabilities are high and accurate. Hence every field prefers automated control systems. Especially in the field of electronics automated systems are doing better performance. Probably the most useful thing to know about the global system for mobile communication is that it is an international standard. If you travel in parts of world, GSM is only type of cellular service available. Instead of analog services, GSM (DTMF) was developed as a digital system using TDMA technology. OBJECTIVE:

The goal of the project is to develop a system, which uses Mobile technology that keeps control of the various units of the automobiles, which executes with respect to the signal sent by the mobile. For utilization of appliances the new concept has been thought to manage them remotely by using GSM (DTMF), which enables the user to remotely control switching of domestic appliances. Just by dialing keypad of remote telephone, from where you are calling you can perform ON / OFF operation of the appliances. The ranges of appliances that can be controlled through tele remote systems are many in numbers. Some of them are as follows and this depends upon the usage priority of the appliances i.e. Industrial appliances, Music System or other electrical / electronic appliances. SOFTWARE REQUIREMENT:

1. KEIL MICRO VISION-3
2. MICRO FLASH
3. ORCHAD

HARDWARE REQUIREMENT:
1. MICROCONTROLLER (89S52)
2. ULN2003.
3. POWER SUPPLY.
4. DC MOTOR.
5. DTMF HT9170B.
6. RELAYS

BLOCK DIAGRAM

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Power supply

AT89S52
Micro...
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