Telephony Communication
DTMF decoder

This circuit detects the dial tone from a telephone line and decodes the keypad pressed on the remote telephone. two distinct frequency tones make up the DTMF(dual tome multiple frequency), and hence the name. The the dialer and the telephone exchange communicate one way through the DTMF communication.the tone generator and the tone decoder consist of a complete communication setup. In this project, IC MT8870DE is used to decode the input dial tone to the dialled numbers. These digital bits can ....etc

[:=Read Full Message Here=:]

Internet Protocol (IP) Telephony has many issues that have to be overcome before it can be considered a rival to the existing telephony infrastructure. One such issue is the quality of service. The use of play-out buffering at the receiver helps to improve the quality of Voice over IP (VoIP). A buffering algorithm has been proposed by Narbutt, which uses a dynamic approach to buffering. This algorithm is adjusted automatically according to an estimate of the network delay. This is more suitable to the changing network conditions usually experie ....etc

[:=Read Full Message Here=:]

hello sir,
can you please suggest me how to write a program for dtmf decoder ht9170b interfacing with 8051 micro controller. ....etc

[:=Read Full Message Here=:]

to get information about the topic mobile controlled home appliances using dtmf decoder full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-home-appliance-pc-cursor-control-by-mobile-phone-dtmf?pid=51297&mode=threaded

http://seminarsprojects.net/Thread-home-appliance-control-by-mobile-phone-dtmf ....etc

[:=Read Full Message Here=:]

] ....etc

[:=Read Full Message Here=:]

This home appliances control or home automation project also uses the same DTMF decoder circuit section with little modifications to control home and office electrical appliances. Just connect your cell phone headset (headphone) jack to the mobile phone and then mobile will control electrical appliances and electrical equipment through the DTMF key pad of your cell phone. Here for demonstrating, we are controlling an electrical bulb using this circuit project but you can extend this circuit to control many electrical devices with some modificat ....etc

[:=Read Full Message Here=:]

To get full information or details of controlling robot using dtmf decoder please have a look on the pages

http://seminarsprojects.net/Thread-dtmf-based-mobile-controlled-robot

http://seminarsprojects.net/Thread-wireless-controlled-mine-detecting-robot

http://seminarsprojects.net/Thread-mobile-controlled-robot-using-dtmf-technology-for-industrial-application

http://seminarsprojects.net/Thread-mobile-controlled-robot-using-dtmf-technology--104350

http://seminarsprojects.net/Thread-mobile-controlled-robot-using-dtmf-technology

http://semi ....etc

[:=Read Full Message Here=:]

Abstract

For numerous motion control applications, the limiting factor in the design of the motion device is a highly accurate and quick response. To achieve these performance characteristics, two approaches to the design are possible. The first focuses on the physical construction of the motion device, which includes increasing the mass and thus the rigidity of the system, as well as employing high-precision components. The second procedure addresses the software required to operate and control the system. By combining several advanced cont ....etc

[:=Read Full Message Here=:]

i want the topic implementing digital signature with rsa encription algorithm to be discuose in a seminal form ....etc

[:=Read Full Message Here=:]

circuit diagram of home automation with dtmf decoder at89c51 using mobile communication
i want to circuit diagram of home automation with dtmf decoder at89c51 using mobile communication and also ppt slides of that ....etc

[:=Read Full Message Here=:]