{"product_id":"mt8870-dtmf-audio-speech-decoding-telephone-module","title":"MT8870 DTMF Audio\/Speech Decoding Telephone Module","description":"\u003cdiv class=\"product_info\"\u003e\n\u003ch2 class=\"sing--sub-heading\"\u003e\u003cspan style=\"font-size: 18.72px;\"\u003eMT8870 DTMF Audio\/Speech Decoding Telephone Module\u003c\/span\u003e\u003c\/h2\u003e\n\u003cstrong\u003e This component is ideally suited to adding dual tone multi-frequency (DTMF) \u003c\/strong\u003e decoding to your project. This detection module interprets the incoming tone and produces a coded output that can be connected to all manner of microcontrollers.\u003cbr\u003e\u003cbr\u003eDTMF is commonly found in touch tone devices such as a phone. The tone is a combination of two separate sine waves that produce a unique signal that can be transmitted or heard. When the module receives the signal it is able to decode it and produce a binary output that can be used in other devices. The module shows the state of the signal through onboard LEDs.\u003cbr\u003e\u003cbr\u003eAs an idea, you can connect up a mobile phone via 3.5mm to 3.5mm cable to the module. Dialling into the phone from a second mobile and then using the keypad will produce the tones on the original phone. The tones in the call can then be interpreted by the module, allowing you to control all manner of projects. The pins are suited to standard sockets with a pin pitch of 2.54mm.\u003cbr\u003e\u003cbr\u003eThe MT8870 Tone Decoder is a kind of commonly used multi-frequency decode IC product developed by the MITEL company. It is a complete DTMF receiver. After it received the DTMF signal, it will divide the signal into high-frequency group and low-frequency group and send the signal to the digital decoder which can figure out the key value then send it to the outside Bus via four lines( Q1, Q2, Q3, Q4) as the binary form.\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eTechnical Details\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eOperating Voltage: 5V DC\u003c\/li\u003e\n\u003cli\u003eChip: MT8870DS\u003c\/li\u003e\n\u003cli\u003ePower Consumption: 500mW (Max)\u003c\/li\u003e\n\u003cli\u003eOperating Temperature: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eBoard Color: Blue\u003c\/li\u003e\n\u003cli\u003eDimensions: 28mm × 25mm × 10mm\u003c\/li\u003e\n\u003cli\u003eWeight: 4g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eFeatures\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eOnboard Voice Input Interface\u003c\/li\u003e\n\u003cli\u003eLow Power Consumption\u003c\/li\u003e\n\u003cli\u003eInternal Gain Setting Amplifier\u003c\/li\u003e\n\u003cli\u003eOnboard LED for Output State Indication\u003c\/li\u003e\n\u003cli\u003eAdjustable Guard Time\u003c\/li\u003e\n\u003cli\u003eCentral Office Quality\u003c\/li\u003e\n\u003cli\u003eOnboard 3.5mm Audio Input Interface\u003c\/li\u003e\n\u003cli\u003e5-Channel Interface\u003c\/li\u003e\n\u003cli\u003eOnboard MT8870 Frequency Decoder Chip\u003c\/li\u003e\n\u003cli\u003ePower-Down Mode \u0026amp; Inhibit Mode\u003c\/li\u003e\n\u003cli\u003eOnboard Audio Input Interface\u003c\/li\u003e\n\u003cli\u003eComplete DTMF Receiver\u003c\/li\u003e\n\u003cli\u003eNo External Circuits or Wiring Required\u003c\/li\u003e\n\u003cli\u003eCompatible with UNO\/MEGA2560\/DUE Boards\u003c\/li\u003e\n\u003cli\u003e12-Digital Outputs Decode Mobile \u0026amp; Telephone Keys (0-9, *, #)\u003c\/li\u003e\n\u003cli\u003eAdditional 4-Digital Outputs (ABCD) for DTMF Dial Software Control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch2 class=\"sing--sub-heading\"\u003e\u003cspan style=\"font-size: 18.72px;\"\u003eApplications :\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote Control Systems\u003c\/strong\u003e - Allows remote control of devices via phone by decoding DTMF signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelecommunication Projects\u003c\/strong\u003e - Integrated in systems that need to decode DTMF signals sent over phone lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome Automation\u003c\/strong\u003e - Controls home automation systems through DTMF tones dialed from a phone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecurity Systems\u003c\/strong\u003e - Used to activate alarms or unlock doors based on phone commands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoice-Controlled Devices\u003c\/strong\u003e - Allows voice or DTMF-based control in robotic or automated systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eIntegration with Arduino\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" id=\"p_info\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/files\/DTMF_Interfacing_Diagram.png?v=1639563484\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003eSample Code\u003c\/h3\u003e\n\u003cscript src=\"https:\/\/gist.github.com\/labsguru\/c728c7afb0d34b860c4837bead207387.js\"\u003e\u003c\/script\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePhysical Attributes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds\"\u003e\n\u003cli\u003eDimensions: 28mm × 25mm × 10mm\u003c\/li\u003e\n\u003cli\u003eWeight: 4g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product_info\"\u003e\n\u003ch3 class=\"sing--sub-heading\"\u003ePackage Includes\u003c\/h3\u003e\n\u003cdiv id=\"p_info\"\u003e\n\u003cul class=\"pro-ds ls-n\"\u003e\n\u003cli\u003e1 x MT8870 DTMF Audio\/Speech Decoding Telephone Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"KitsGuru","offers":[{"title":"Default Title","offer_id":40708874928309,"sku":"KG245","price":114.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0587\/2130\/4757\/products\/MT8870-DTMF-AudioSpeech-Decoding-Telephone-Module-2_2dc366b8-18e4-4ba0-b60e-69b9e4fff9c2.jpg?v=1738235695","url":"https:\/\/kitsguru.com\/es\/products\/mt8870-dtmf-audio-speech-decoding-telephone-module","provider":"KitsGuru","version":"1.0","type":"link"}