Redboard VHM-314 Bluetooth 4.1 MP3 Decoder Board

Name: Redboard VHM-314 Bluetooth 4.1 MP3 Decoder Board
Brand: Generic
SKU: IOWC-0135
Price: 131.00 INR
Availability: OutOfStock

₹131.00 (Inclusive of all taxes)

Out of Stock

The Redboard VHM-314 is a Bluetooth 4.1 MP3 decoder board designed for wireless audio streaming and playback in DIY projects, powered by a 3.7-5V supply.

Features

Bluetooth 4.1 wireless connectivity for streaming audio from smartphones and tablets.
Integrated MP3 decoder delivers high-fidelity audio with a 90dB SNR and -70dB THD+N.
Compact board form factor ideal for embedding into portable speakers and custom audio systems.
Type-C USB interface provides flexible connectivity for data and power input.
Low-voltage operation (3.7-5V) compatible with Li-ion batteries and standard USB power banks.

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Description

The Redboard VHM-314 is a specialized audio-focused Bluetooth module that combines a Bluetooth 4.1 transceiver with an integrated MP3 decoder IC. It handles the complete wireless audio pipeline, from receiving the A2DP stereo stream from a paired device to decoding compressed audio files for analog output. The board’s architecture is optimized for clear audio reproduction, featuring a high signal-to-noise ratio and low distortion specifications suitable for consumer-grade audio projects.

Its design centers on ease of integration, requiring only a single 3.7-5V DC power source to operate. The inclusion of a modern Type-C USB port simplifies both firmware updates and power delivery. This module is engineered for developers and makers looking to add wireless audio capabilities to speakers, interactive installations, or custom infotainment systems without designing complex RF and codec circuits.

Key Features

Bluetooth 4.1 with A2DP profile support for stereo audio streaming from compatible source devices.
On-board MP3 decoder chip handles audio file playback directly from a connected USB storage device.
High-performance audio output with a 90dB Signal-to-Noise Ratio (SNR) and -86dB crosstalk.
Type-C USB port serves dual purposes for 5V power input and connecting flash drives for local MP3 playback.
Wide operating voltage range (3.7-5V) enables direct use with a single-cell Li-Po battery or regulated 5V supply.
Compact PCB layout allows for direct integration into finished product enclosures and prototypes.

Applications

DIY Bluetooth speakers and portable boombox projects.
Wireless audio streaming modules for home automation and smart home devices.
Background music systems for retail displays, art installations, or interactive exhibits.
Educational kits for learning about wireless audio technology and embedded systems.
Upgrading legacy audio systems with modern Bluetooth connectivity.

Technical Specifications

Wireless Protocol	Bluetooth 4.1 (A2DP)
Audio Decoding	MP3 Decoder
Signal-to-Noise Ratio (SNR)	90 dB
Total Harmonic Distortion + Noise (THD+N)	-70 dB
Channel Separation (Crosstalk)	-86 dB
Dynamic Range (DNR)	91 dB
Supply Voltage	3.7 - 5V DC
Interface	USB Type-C
Dimensions (Shipping)	8 x 6 x 3 cm

Frequently Asked Questions

What audio profiles does the VHM-314 Bluetooth module support?

The VHM-314 module supports the Bluetooth 4.1 specification with the Advanced Audio Distribution Profile (A2DP) for streaming stereo audio from your smartphone, tablet, or computer. It acts as a sink/receiver, allowing you to play music wirelessly from your device through the module's audio output. It does not support hands-free (HFP) or microphone input profiles for calls.

How do I play local MP3 files using this decoder board?

To play local MP3 files, connect a USB flash drive containing your audio files directly to the board's Type-C USB port. The integrated MP3 decoder chip will automatically read and decode the files. Ensure your drive is formatted with a compatible file system (typically FAT32) and that the MP3 files are placed in the root directory. The module will often begin playback automatically upon power-up when a storage device is detected.

What power supply is required for the VHM-314 board?

The board requires a DC power supply between 3.7 and 5 volts. You can power it via the Type-C USB port using a standard 5V USB adapter or power bank. Alternatively, you can connect a regulated 3.7V source, such as a single-cell Li-ion or Li-Po battery, directly to the appropriate VCC and GND pads on the board. Exceeding 5V may damage the onboard components, so using a regulated supply is recommended.