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DTMF - Computers electronics


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DTMF Remote ControlDTMF Remote Control

DTMF Remote control – A software DTMF decoder for PIC 16F87X

http://dtmf.voipintouch.net/content/dtmf.htm


Radio Control Using DTMF

This Schematic using IC UM91214B for transmitter and using IC KT3170/8870 for Receiver, this IC usually use for telephone to generate DTMF tone. This Schematic using IC UM91214B for transmitter and using IC KT3170/8870 for Receiver, this IC usually use for telephone to generate DTMF tone........

http://radio-control-schematics.blogspot.com/2007/07/radio-control-using-dtmf.html


DTMF Phone DialerDTMF Phone Dialer

http://avtanski.net/projects/phone_dialer


MSP430 launchpad with DTMF - MSP430 Ultra-Low Power 16-bit Microcontroller Forum - MSP430 Microcontrollers - TI E2E Community

Ask questions, share knowledge, explore ideas, and help solve problems with fellow engineers and TI experts.

http://e2e.ti.com/support/microcontrollers/msp430/f/166/t/256047.aspx


Duel Tone Multi Frequency (DTMF Electronic CircuitsDuel Tone Multi Frequency (DTMF Electronic Circuits

Duel tone multi frequency (DTMF) electronic circuits, schematics or diagrams. Discovercircuits.com is your portal to free electronic circuits links.

http://discovercircuits.com/D/dtmf.htm


Display of Dialed Telephone Numbers on Seven Segment Displays | DTMF based ProjectsDisplay of Dialed Telephone Numbers on Seven Segment Displays | DTMF based Projects

The main objective of this project is to display the dialed telephone number on seven segment display for better visibility. It is based on the concept of DTMF. Edgefx Technologies provides this embedded project for final year engineering students.

http://www.edgefxkits.com/display-of-dialed-telephone-numbers-on-seven-segment-displays


DTMF Decoder for PCDTMF Decoder for PC

Our DTMF decoder can be powered from a 9V battery or from your parallel printer port. It can detect and display all 16 DTMF digits on your computer screen in real-time. The Window's program can be placed in the minimize mode and still detect tones while you use your computer to do other things like Net surfing!!!! We are now in the process of adding an DTMF decoder which will interface to the sound card gameport.......

http://www.electronics-diy.com/electronic_schematic.php?id=171


DTMF RECEIVERDTMF RECEIVER

Today, most telephone equipment use a DTMF receiver IC. One common DTMF receiver IC is the Motorola MT8870 that is widely used in electronic communications circuits. The MT8870 is an 18-pin IC. It is used in telephones and a variety of other applications. When a proper output is not obtained in projects using this IC, engineers or technicians need to test this IC separately. A quick testing of this IC could save a lot of time in research labs and manufacturing industries of communica.......

http://electronics-diy.com/electronic_schematic.php?id=170


What is DTMF (Dual Tone Multi Frequency)? Basic principle and use of DTMF in communication | Electronics Circuits

What is DTMF (Dual Tone Multi Frequency)? Basic principle and use of DTMF in communication

http://www.circuitsgallery.com/2012/06/what-is-dtmf-dual-tone-multi-frequency.html


The Link A2B+1 (the Link Telephone Intercom - DTMF version)

The Link A2B+1 (the Link Telephone Intercom - DTMF version), schematics

http://iq-technologies.net/projects/telephone/014


Radio Remote Control using DTMF Circuit

A collection of electronic circuits and projects to build.

http://www.free-electronic-circuits.com/circuits/radio-remote-control-using-dtmf.html


8-channel DTMF Link: Decoder

In the decoder designed for the DTMF Link project a Holtek HT9170B does the main job. The natural counterpart of the HT9200B used in the associated encoder (described elsewhere in this publication), the HT9170B is a Dual Tone Multi Frequency (DTMF) receiver with an integrated digital decoder and bandsplit filter functions. Then IC uses digital counting techniques by means of a 3.58 MHz crystal to detect and decode all the 16 DTMF tone pairs into 4-bit words........

http://www.elektor.com/magazines/2010/july-047-august/8-channel-dtmf-link-decoder.1391295.lynkx


EDN Access - 10.13.94 DTMF coder makes low-cost sine-wave generato | EDN

EDN is a leading source for reliable electronics design ideas, articles, how to articles and teardowns. Read EDN.com for the latest information on analog design, automotive design, communications and networking design, consumer electronics design, integrated circuit design, LED design, medical electronics design, electronics power management design, sensor design, electronic systems design, and electronics test and measurement........

http://www.edn.com/design/other/4356494/EDN-Access--10-13-94-DTMF-coder-makes-low-cost-sine-wave-generato


DTMFcircuit-diagram-of-dtmf-coder

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