{"product_id":"mt8870-dtmf-audio-speech-decoding-telephone-module","title":"MT8870 DTMF Audio\/Speech Decoding Telephone Module","description":"\u003cp\u003eThis component is ideally suited to adding dual tone multi-frequency (DTMF) 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.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\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.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\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.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\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\/p\u003e\n\u003cp\u003eFeatures:\u003c\/p\u003e\n\u003cp\u003eOnboard voice input interface\u003c\/p\u003e\n\u003cp\u003eLow power consumption\u003c\/p\u003e\n\u003cp\u003eInternal gain setting amplifier\u003c\/p\u003e\n\u003cp\u003eOnboard LED, it is very convenient to check the output state.\u003c\/p\u003e\n\u003cp\u003eAdjustable guard time\u003c\/p\u003e\n\u003cp\u003e Central office quality\u003c\/p\u003e\n\u003cp\u003eOnboard 3.5mm input interface\u003c\/p\u003e\n\u003cp\u003e5 Channel interface\u003c\/p\u003e\n\u003cp\u003eOn-board MT8870 frequency decoder chip\u003c\/p\u003e\n\u003cp\u003ePower-down mode\u003c\/p\u003e\n\u003cp\u003eInhibit mode\u003c\/p\u003e\n\u003cp\u003eOnboard audio input interface\u003c\/p\u003e\n\u003cp\u003eOnboard LED lights for output state indicationComplete DTMF Receiver.\u003c\/p\u003e\n\u003cp\u003eDoes not require external circuits or wiring, it can be inserted directly into the UNO\/MEGA2560\/DUE board to use.\u003c\/p\u003e\n\u003cp\u003e12-Digital outputs decode mobile and fixed telephone keys (0-9, * #). Also, another 4 Digital output(ABCD) can use \"DTMF Dial\" for Software control.\u003c\/p\u003e\n\u003cp\u003ePackage Includes:\u003c\/p\u003e\n\u003cp\u003e1 x MT8870 DTMF Audio\/Speech Decoding Telephone Module \u003c\/p\u003e\n\u003cp\u003eSpecification:\u003c\/p\u003e\n\u003cp\u003eOperating Voltage (VDC): 5\u003c\/p\u003e\n\u003cp\u003eChip MT8870DS\u003c\/p\u003e\n\u003cp\u003ePower Consumption (mW) 500mW (MAX)\u003c\/p\u003e\n\u003cp\u003eOperating Temperature (°C): -40-+85 °C\u003c\/p\u003e\n\u003cp\u003eBoard Color Blue\u003c\/p\u003e\n\u003cp\u003eDimensions (L x W x H) mm 27 x 25 x 10\u003c\/p\u003e\n\u003cp\u003eWeight (g): 5g\u003c\/p\u003e\n\u003cp\u003eShipping Weight 0.02 kg\u003c\/p\u003e\n\u003cp\u003eShipping Dimensions 3 ×\u003c\/p\u003e\n\u003cp\u003e2 × 2 cm\u003c\/p\u003e","brand":"Jaideep Robotics","offers":[{"title":"Default Title","offer_id":46750323933357,"sku":"407537","price":79.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0773\/7638\/9293\/files\/download_31.jpg?v=1783166635","url":"https:\/\/jaideeprobotics.com\/products\/mt8870-dtmf-audio-speech-decoding-telephone-module","provider":"Jaideep Robotics ","version":"1.0","type":"link"}