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I want a seminar powerpoint presentation slides on DTMF based typing system. whatever typed on a cellphone displays live on a display.
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Hello sir,
I am in final year B.tech (electrical & electronics engg.). I would appreciate your help in my minor project. I need a report on Cellphone operated Robot based on DTMF technology.
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Final Report on
Dual-Tone Multiple Frequency (DTMF) Detector Implementation
Presented By:
Giiner Arslan
for EE382C Embedded Software Systems
Abstract
Dual-tone Multi-frequency (DTMF) signals are used in touch-tone telephones as well as many other areas such as interactive control, telephone banking, and pager system. As analog telephone lines are converted to digital, researchers became interested in digital DTMF detectors.
There are many digital DTMF detecting algorithms, but most of them do not comply wit ....etc

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http://electronic-circuits-diagramsremotecontrolsimages/5.gif
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 a ....etc

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SYNOPSIS
Dual-tone Multi-Frequency (DTMF) signaling is the basis for voice communications control and is widely used worldwide in modern telephony to dial numbers and configure switchboards. It is also used in systems such as in voice mail, electronic mail and telephone banking.
The detector part of early DTMF systems consisted of analog implemented bandpass filter banks, which were tuned to the eight standard frequencies. As analog lines as well as many other analog systems were converted to digital, researchers became ....etc

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Purpose of our course project is to develop DTMF signal controlled house monitoring
system based on PIC Microcontroller. The device is connected to phone line and is controlled by
DTMF signal emitted by DTMF encoder in stationary or mobile phones. In presence of incoming
call the device pick-up the phone and answer the call connecting to the line. User can press
buttons and control the system remotely. Function of keys should be known initially (read
manual in appendix B). The functions are:
· speakerphone monitoring (you can lis ....etc

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power point presentation on dtmf based automated typing system ....etc

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