MT8870 DTMF Voice Decoding Module - Buy Online in India

Package Includes:

• 1 x MT8870 DTMF Voice Decoding Module

Specifications:

Specifications:

MT8870DS

Specifications:

5V

Specifications:

500mW (MAX)

Specifications:

MT 8870 DTMF Tone Decoding Module

Specifications:

-40-+85 °C

Specifications:

Blue

Specifications:

27 x 25 x 10

Specifications:

5g

• Datasheet
• Schematic

1. What is DTMF in audio?

DTMF, or Dual Tone Multi Frequency, is a technology utilized in touch-tone phones. It's recognized by users as the sound produced when pressing a number key. Each key press triggers the transmission of two tones: one high frequency and one low frequency. These tones signal the phone company that a call needs to be made and convey commands to the switch, facilitating efficient communication.

2. How to decode DTMF signals?

To decode DTMF signals:

• Connect audio signals from the keypad to a microphone.
• Process signals with an Op-amp in the DTMF decoder IC.
• Filter frequencies into low and high groups.
• Detect frequencies to identify DTMF tones.
• Decode tones into binary sequences using the decoder IC.
• Output decoded information, controlled by the IC's pins.
• Use control pins to manage oscillator frequency and enable/disable functions.

3. What is the function of DTMF decoder?

The function of a DTMF decoder is to interpret dual-tone multi-frequency signals received from a source, such as a telephone keypad or other input device. It analyzes the incoming audio signals and decodes them into corresponding digital outputs, typically representing the keys or commands pressed on the keypad. This decoded information can then be used for various purposes, such as dialing phone numbers, controlling electronic devices, or interacting with automated systems.

4. How does the MT8870 DTMF Voice Decoding Module ensure signal quality?

The module includes an internal gain-setting amplifier and is designed to ensure central office quality for optimal signal reception. This feature, combined with the onboard LED indicators and adjustable guard time, helps in maintaining signal integrity and reliability even in varying conditions.

5. What are the compatibility options for the MT8870 DTMF Voice Decoding Module?

The module is compatible with UNO/MEGA2560/DUE boards and can be directly inserted into these boards for use. This compatibility enhances ease of integration and makes it suitable for a wide range of projects and applications without the need for additional wiring or circuits.

6. Does the MT8870 DTMF Voice Decoding Module offer any control options?

Yes, the module includes 12 digital outputs for decoding mobile and fixed telephone keys (0-9, * #), as well as 4 digital outputs (ABCD) that can be used for software control via "DTMF Dial." This provides users with flexibility in controlling and interacting with the decoded DTMF signals programmatically.

Shipping Policy

• All orders confirmed before 3:00 PM IST are shipped the same day, barring rare pickup delays on holidays or disturbances.
• Delivery time in Metro cities is 1–3 days; for other locations, it is 3–7 days. Delivery varies based on location and courier service.

Return & Refund Policy

• Return window: 7 days from receipt unless stated otherwise.
• No refunds or replacements after the return window.
• Returns are accepted only for non-working or damaged products.
• Initiate return requests via a Support ticket or contact us at +91-8123057137.
• Refunds are processed within 3–4 working days after inspection and approval.