MT8870 DTMF Telephone Voice Module

MT8870 DTMF Decoder Telephone Voice Module

MT8870 DTMF Telephone Audio Circuitis a DTMF module where you can give commands and control your devices with the sound signals you send from your phone.ArduinoandRaspberry PiCompatible with. You can send commands with the keys by connecting the phone through the headphone jack. MT8870 IC decodes the audio signal from your phone and makes the STD pin 1 or 0. After STD becomes 1, 4-bit key information is read on pins Q1, Q2, Q3 and Q4. You can control your circuit by processing this information in your processor. Advantage over Wifi and Bluetooth control, you don't need to be within a certain distance to control it. By calling the phone you connected, you can control your device remotely by kilometers.

MT8870 DTMF Telephone Voice Module Technical Specifications

• Built-in complex frequency decoding chip
• Internal audio input jack
• Built-in 5 LEDs to see the digital information sent to the output
• Dimensions: 6.5 (mm) x24.5 (mm)

Useful Links

• Bluetooth ModulesYou can examine.