why dtmf receiver mt8870 operates in 3 579mhz ....etc

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SUBMITTED BY:
ManoJ Sehgal


Mobile Controlled ROBOT Using DTMF Technology
Introduction
What is a Mobile controlled DTMF ROBOT?
DTMF Mobile ROBO is a machine that can be controlled with a mobile . In this project, the robot is controlled by a mobile phone that makes a call to the mobile phone attached to the robot. In the course of a call, if any button is pressed, a tone corresponding to the button pressed is heard at the other end of the call. ....etc

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Home appliance & pc Cursor control by mobile phone (DTMF)
Aim of project:-
The main aim of the project is to implement an interfacing system to remotely control electrical appliances using the mobile network.
Using the system one can remotely switch on or off electrical machine using mobile phone from anywhere.
PROGRESS REPORT
Operating Environment
The control system will include two separate units:-
the cellular phone.
and the control unit.
There will be two operating ....etc

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DTMF BASED MOBILE PHONE CONTROLLED ROBOT


INTRODUCTION TO EMBEDDED SYSTEMS
Each day, our lives become more dependent on 'embedded systems', digital information technology that is embedded in our environment. More than 98% of processors applied today are in embedded systems, and are no longer visible to the customer as 'computers' in the ordinary sense. An Embedded System is a special-purpose system in which the computer is completely encapsulated by or dedicat ....etc

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hey guys, am interested in carrying out this project for my final year. I need more resources, than i have found. thank you in anticipation..
here's my email [email protected] ....etc

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Abstract
In this project, we present controlling of a Robot using DTMF technique.
The robot is controlled by a mobile phone that makes call to the other
mobile phone attached to the robot. In the course of the call, if any button
is pressed, tone corresponding to the button pressed is heard at the other
end of the call. This tone is called dual tone multi frequency tone (DTMF).
Using DTMF code, direction of motion of the robot can be controlled by
mobile phone. Robot has a RF camera that transmits an actual video at the
operator ....etc

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hi. my name is sandeep.t.m and studying in s.j polytechic and our project his human detection robot controlled by mobile using DTMF Technology. i need help about its application.where its used , for what purpose.
and my email his [email protected] ....etc

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CHAPTER I
1.1 Abstract
The objective of this project is to enable users to remotely control their home appliances and systems using a cell phone-based interface. To access the control unit, the user should send an authentication code along with the required/desired function/action to his/her home control system via GSM. Upon being properly authenticated, the cell phone-based interface at home (control unit) would relay the commands to a microcontroller that would perform the required function/action.
1.2 Problem ....etc

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Today, most telephone equipment usea DTMF receiver IC. One commonDTMF receiver IC is the MotorolaMT8870 that is widely used in electroniccommunications circuits. The MT8870 isan 18-pin IC. It is used in telephones anda variety of other applications. When aproper output is not obtained in projectsusing this IC, engineers or technicians needto test this IC separately. A quick testingof this IC could save a lot of time in researchlabs and manufacturing industriesof communication instruments. Here’s asmall and handy tester circu ....etc

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