MT8870 DTMF Speech Decoding Module

The MT8870 based DTMF (Dual Tone Multi-Frequency) decoder module is commonly used to control robots with a mobile phone, it is also used in different kinds of home automation projects where mobile dial pad input is required. This module works as a tone decoder that uses its 3.5 mm audio connector socket to get the input audio signal. It is popularly used for mobile and fixed telephone voice dialing and recording-related functions.

Tech specification

1. Power Input: 5V Nominal (4.5V – 5.5V)
2. Onboard 3.5mm jack input Facility
3. MT8870 Based Frequency Decoder
4. 5 Channel Interface
5. Detects 0-9, A-D, *, #
6. LED notifier for Output state
7. 2.54” Pin pitch
8. Board Dimension: 37 x 25 x 12 mm (l x w x h)