MT8870 DTMF Voice Decoding Module – DIY Phone Decoder Kit

$8.29 $9.64

MT8870 DTMF Voice Decoding Module – DIY Electronics Kit

The MT8870 DTMF Voice Decoding Module is a compact, reliable decoder board designed for electronics hobbyists, engineers, and makers. Built around the industry-standard MT8870 chip, this module decodes Dual-Tone Multi-Frequency (DTMF) signals — the tones generated by telephone keypads — and outputs them as 4-bit digital data, making it ideal for remote control, telephone interfacing, and automation projects.

Whether you're building a phone-triggered relay system, an access control circuit, or a custom DIY automation device, this module delivers clean, stable decoding performance at an accessible price point.

Key Features

MT8870 Chip: Industry-standard DTMF decoder IC for accurate tone detection
5V DC Supply: Compatible with Arduino, Raspberry Pi, and most microcontroller platforms
4-Bit Digital Output: Easy-to-read binary output for all 16 DTMF tones (0–9, A–D, *, #)
Wide Operating Temperature: -65°C to +150°C for reliable performance across environments
Low Power Dissipation: 500mW maximum — energy-efficient for battery or USB-powered projects
DIY Kit Package: Comes ready for assembly and customization
Compact Form Factor: Easy to integrate into breadboards and PCB designs

Specifications

Supply Voltage: DC 5V
Dissipation Power: 500mW
Operating Temperature: -65°C to +150°C
Package: DIY Kit
Condition: New
Quantity: 1 Module
High-Concern Chemicals: None

Made in Mainland China.

Perfect For

Arduino and microcontroller-based projects
Telephone remote control and automation systems
DIY access control and security projects
Electronics learning and prototyping
Robotics and home automation

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Frequently Asked Questions

Q: What is the MT8870 DTMF Voice Decoding Module used for?

A: The MT8870 DTMF Voice Decoding Module is used to detect and decode Dual-Tone Multi-Frequency (DTMF) signals — the audio tones produced by telephone keypads. It converts these tones into a 4-bit binary output, making it ideal for DIY remote control systems, telephone-triggered automation, access control circuits, and Arduino/microcontroller projects.

Q: What voltage does the MT8870 DTMF module require?

A: The module operates on a DC 5V supply voltage, making it fully compatible with Arduino boards, Raspberry Pi, and other common 5V microcontroller platforms. It has a maximum power dissipation of 500mW, keeping energy consumption low.

Q: Is this module compatible with Arduino?

A: Yes! The MT8870 DTMF module runs on 5V DC and outputs standard 4-bit digital signals, making it straightforward to interface with Arduino, ESP8266, ESP32, and similar development boards. It is an excellent choice for DIY electronics and automation projects.

Q: Does this come fully assembled or as a kit?

A: This product is packaged as a DIY Kit, so it may require some assembly. It is designed for electronics hobbyists and makers comfortable with basic soldering and circuit work.