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Description: • To design a GUI in MATLAB for Dual-Tone Multi-Frequency (DTMF) telephone key pad, including DTMF Signal generator and DTMF tone detector
• To simulate the DTMF signals with noise based on the specifications given.
• To decode and display the DTMF signals by using FFT algorithm
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Size: 16384 |
Author: 冯扬 |
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Description: 本设计是关于方波发生器和音调识别器的设计，以NE567音调解码器为基础器件，配上其它适当的零部件，在试验箱上进行电路的设计连接。本文详细介绍了LM567的内部结构、工作原理、性能指标和选择参数以及用其所设计的频率调制器（方波发生器）和音频信号识别器（音调控制开关）。-The design is on the square-wave generator and a tone recognizer designed to NE567 tone decoder-based devices, with other appropriate components, in the chamber on the design of circuit connections. This paper introduces the LM567 s internal structure, working principle, performance indicators and selection of parameters and the frequency with which it was designed modulator (square-wave generator) and the audio signal identifier (tone control switch).
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Size: 48128 |
Author: 苏东坡 |
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Description: telephone tone decoder
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Size: 155648 |
Author: garrett |
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Description: This project is used as an electronic private exchange. It has two telephones, which have the intercom facility, and they can be connected to the telephone line. All the functions are controlled by the 8-bit microcontroller AT89C2051 which has an Program Memory (ROM) of 2 kilobytes.
The DTMF (Dual tone multiple frequency) signals are decoded by the DTMF decoder IC 8870 and its output will be in decimal of the pressed key. The switching functiond are done by 12v relays.
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Size: 47104 |
Author: Binu |
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Description: MT8870 DTMF tone decoder code and implementation
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Size: 25600 |
Author: SBS |
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Description: This project is used as an electronic private exchange. It has two telephones, which have the intercom facility, and they can be connected to the telephone line. All the functions are controlled by the 8-bit microcontroller AT89C2051 which has an Program Memory (ROM) of 2 kilobytes.
The DTMF (Dual tone multiple frequency) signals are decoded by the DTMF decoder IC 8870 and its output will be in decimal of the pressed key. The switching functiond are done by 12v relays.
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Size: 21504 |
Author: sivakumar |
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Description: CPT Detection of ht95r6-CPT Detection of ht95r6xx
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Size: 122880 |
Author: gautam |
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Description: 基于DSP的DTMF（双音多频）设计与实现解码代码-Design and Implementation of DSP-based DTMF (Dual Tone Multi Frequency) decoder code
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Size: 7168 |
Author: 胡坤 |
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Description: In the 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 called 慏ual Tone Multiple frequency?(DTMF) tone. The robot receives these tones with help of phone stacked in the robot. The received tone is processed by the microcontroller with the help of DTMF decoder ic cm8870 . This ic sends a signals to the the motor driver ic l293d which derives the motor forward, reverse卐tc. Project is built using AVR microcontroller the ATmega16.
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Size: 973824 |
Author: rajesh vana |
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Description: MT8880产生发送和接收译码各使用了一片集成电路，而DTMF双向收／发集成电路MT8880专门为双音频信号的收、发而设计，，它既能产生发送双音频信号，又能对双音频信号进行接收译码，还能判断各种信号音(拨号音、回铃音、忙音)。-good 已通过测试。
-MT8880 generate send and receive decoding the use of an integrated circuit, DTMF bi-directional transmit/receive IC MT8880 specifically for the dual audio signal of closing, hair design, it not only generated to send the audio signal, but also two-tone The signal receiving decoder can also determine a variety of tones (dial tone, ring back tone, busy tone).-Good has been tested.
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Size: 104448 |
Author: zcl1233 |
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Description: HM9270双音多频接收解码器详细资料,适用于电话语音解码应用.-HM9270 dual-tone multi-frequency receiver decoder details, applies to telephone speech decoding applications.
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Size: 128000 |
Author: 李浩苒 |
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Description: Introduction
Dial your number using DTMF phone or Cell phone from anywhere in the world and remotely turn on/off any of the 8 relays. The MCU on the interface senses Telephone ring, Automatic telephone pick up, and line hang up, displays information on a 16x2 LCD module and controls the relay switching. This interface uses the popular MT8870 DTMF decoder IC along with AT89S51 Microcontroller.
Features
• Outputs - Relays x 8
• Fully microcontroller based interface using AT89S51.
• Auto line pick up.
• On Board flash EEPROM that stores system Parameters and password and relay status (no require battery back up)
• User settable password for security.
• 16x2 Line LCD module to display Status and Error Message.
• Acknowledgement tone out put for the user.
-Introduction
Dial your number using DTMF phone or Cell phone from anywhere in the world and remotely turn on/off any of the 8 relays. The MCU on the interface senses Telephone ring, Automatic telephone pick up, and line hang up, displays information on a 16x2 LCD module and controls the relay switching. This interface uses the popular MT8870 DTMF decoder IC along with AT89S51 Microcontroller.
Features
• Outputs - Relays x 8
• Fully microcontroller based interface using AT89S51.
• Auto line pick up.
• On Board flash EEPROM that stores system Parameters and password and relay status (no require battery back up)
• User settable password for security.
• 16x2 Line LCD module to display Status and Error Message.
• Acknowledgement tone out put for the user.
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Size: 2625536 |
Author: dj |
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Description: MT8870双音解码电话远程控制系统的源码-This graduation design is in order to achieve the STC89C52 single-chip microcomputer as the core of telephone remote control electric equipment, the system main chip is STC89C52 singlechip, dual tone decoder chip MT8870
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Size: 4096 |
Author: 王煌 |
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Description: DTMF DECORDER FOR TONE GENERATOR.
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Size: 195584 |
Author: Mrinalini |
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Description: 主要介绍了锁相环的基本原理，PLL参数测试示例展示，重点分析了CD4046——通用的CMOS锁相环集成电路，MT8870——音调译码器(Tone Decoder)是MITEL 公司所开发生产为一颗常用复频译码IC。-Introduces the basic principles of phase-locked loop, PLL parameter test sample shows, analyzes the CD4046-- generic CMOS PLL IC, MT8870-- tone decoder (Tone Decoder) is MITEL company developed and produced for a common stars complex frequency decoding IC.
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Size: 389120 |
Author: yang |
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Description: The present project aims to develop a DTMF (Dual Tone Multi Frequency) Encoder-Decoder using loopback technical and graphical interface to be developed by Labview program. The signal processing and the application code will be using TMS320C6713i card
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Size: 399360 |
Author: staNou |
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