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- Versatile Compatibility: Works with various DTMF signals, ideal for modems, mobile radios, and more.
- User-Friendly Design: Onboard LEDs for clear signal state and adjustable timing for accurate decoding.
- Wide Applications: Integrates easily with Arduino boards (UNO, MEGA2560, DUE) for diverse projects.
- Central Office Quality: Delivers excellent performance with an internal amplifier for optimal signal reception.
- Convenient Input: Accepts both 3.5mm jack and voice input for seamless operation.
- Multi-Channel Output: 12 dedicated outputs for phone keys (0-9, *, #) and 4 additional outputs for software control.
MT8870 DTMF Voice Decoding Module
The DTMF Decoder Module is the ultimate solution for projects requiring dual-tone multi-frequency decoding. Ideal for modem interfaces, mobile radios, and other DTMF applications, this module offers versatile compatibility and user-friendly design.
With onboard LEDs, low power consumption, and adjustable guard time, it ensures quality performance and easy integration into UNO/MEGA2560/DUE boards. The central office quality and internal gain-setting amplifier guarantee optimal signal reception, making it a reliable choice for diverse projects. Convenient input interfaces, multi-channel outputs, and complete functionality make this module a must-have for enthusiasts and professionals alike.
Purchase now and experience seamless DTMF decoding!
Features:
- Onboard voice input interface
- Low power consumption
- Internal gain setting amplifier
- Onboard LED, it is very convenient to check the output state.
- Adjustable guard time
- Central office quality
- Onboard 3.5mm input interface
- 5 Channel interface
- On-board MT8870 frequency decoder chip
- Power-down mode
- Inhibit mode
- Onboard audio input interface
- Onboard LED lights for output state indicationComplete DTMF Receiver.
- Does not require external circuits or wiring, it can be inserted directly into the UNO/MEGA2560/DUE board to use.
- 12-Digital outputs decode mobile and fixed telephone keys (0-9, * #). Also, another 4 Digital outputs (ABCD) can use “DTMF Dial” for Software control.
MT8870 DTMF Decoder Circuit Diagram:
Applications:
- Modems, mobile radios, call routing.
- Mobile-controlled robots.
- Home Automation.
- Menu navigation via phone keypad.
- Industrial Automation.
- Education.
- Prototyping
MT8870 DTMF Decoder Module - Arduino Test with PWM Audio Synth Tones
Shipping & Returns
Shipping & Returns
- All orders confirmed before 3 pm IST are shipped on the
same day, barring rare pickup delays on holidays or disturbances - Delivery time in Metro cities is 1-3 days, Others it is
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otherwise. No refunds/replacements after - Returns only for non-working/damaged products are accepted
- Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
- Refunds are processed within 3-4 working days post inspection and approval.
For more details, please check our Shipping and Return Policy
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Package Includes:
- 1 x MT8870 DTMF Voice Decoding Module
Specifications:
| Main Chip |
MT8870DS |
|---|---|
| Working voltage |
5V |
| Power Consumption |
500mW (MAX) |
| Type |
MT 8870 DTMF Tone Decoding Module |
| Operating Temperature |
-40-+85 °C |
| Board Colour |
Blue |
| Dimension (LxWxH)mm |
27 x 25 x 10 |
| Weight |
5g |
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
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.
