hi
you can get the details on wan based remote control using dtmf technology in this page

http://seminarsprojects.net/Thread-wan-based-control-of-single-phase-induction-motor-and-monitoring ....etc

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i want circuit diagram and procedure to make this project ....etc

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Respected sir,
Me end my group fellows doing work on microcontroller based industrial load control system using DTMF based signals.. i dont know about literature survey how to prepared it? please do honour and help us. so that we might make our final year project successfully..
thanks. ....etc

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i want the complete project documentation
....etc

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COMPLETE SYSTEM DESIGN FOR INDUSTRIAL AUTOMATION SYSTEM FOR TRANSPORTATION IN PRODUCTION

INTRODUCTION:
This project is based on VTU syllabus. The proposed system is based on ATMEL 89S52 controller which is in our syllabus.
For doing this project we use some of the software like
Embedded C for programming the application software to the microcontroller.
Protel schematic software is used for designing the circuit diagram for ....etc

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The project works on the concept of DTMF (dual tone multi frequency) tone command so received from any phone to remotely switch any electrical load such as agricultural pump, domestic and industrial loads etc. In industries, the loads are spread over a large area and thus, operating these loads is a very tiresome and difficult task.

In agricultural fields also, pumps and other loads are connected over a large area and hence it is difficult for the farmer to operate all the loads and similarly for house hold loads. Keeping these problems in m ....etc

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free ppt download for dtmf based load control

The project works on the concept of DTMF (dual tone multi frequency) tone command so received from any phone to remotely switch any electrical load such as agricultural pump, domestic and industrial loads etc. In industries, the loads are spread over a large area and thus, operating these loads is a very tiresome and difficult task.

In agricultural fields also, pumps and other loads are connected over a large area and hence it is difficult for the farmer to operate all the loads and similarly for ....etc

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ABSTRACT
The objective of this project is to design an embedded system which can control appliances remotely. This project is designed to study the basic implementation of DTMF (Dual Tone Multi Frequency).
The DTMF signal is composed of high frequencies & low frequencies. Each key is assigned a low frequency and a high frequency. When a particular key is pressed, the frequencies those are specific to that particular key are transmitted. Therefore, no two keys will have a same set of low & high frequencies ....etc

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To get full information or details of dtmf based industrial automation and appliances control system please have a look on the pages

http://seminarsprojects.net/Thread-dtmf-based-industrial-automation-appliance-control-system?page=2

http://seminarsprojects.net/Thread-sms-based-industrial-automation-using-arm-controller

http://seminarsprojects.net/Thread-industrial-automation-using-cellphone

http://seminarsprojects.net/Thread-dtmf-based-industrial-automation-appliance-control-system

if you again feel trouble on dtmf based industrial automat ....etc

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a circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4 channels which can be easily extended to 12. This circuit differs from similar circuits in view of its simplicity and a totally different concept of generating the control signals. Usually remote control circuits make use of infrared light to transmit control signals. Their use is thus limited to a very confined area and line-of-sight. However, this circuit makes use of radio frequency to tra ....etc

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