Blackboard VHM-314 Bluetooth 5.0 MP3 Decoder Board w/ Micro USB
Blackboard VHM-314 Bluetooth 5.0 MP3 Decoder Board w/ Micro USB - Image 2
Blackboard VHM-314 Bluetooth 5.0 MP3 Decoder Board w/ Micro USB - Image 3
SKU: IOWC-0137
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Blackboard VHM-314 Bluetooth 5.0 MP3 Decoder Board w/ Micro USB

₹134.00 (Inclusive of all taxes)
Out of Stock

The Blackboard VHM-314 is a Bluetooth 5.0 audio decoder board with integrated MP3 playback, designed for DIY audio projects and powered via a Micro USB port (5V).

Features

  • Bluetooth 5.0 connectivity with A2DP, HFP, and AVRCP support for wireless audio streaming and hands-free calling.
  • Integrated MP3 decoder for direct playback from stored media files, simplifying audio project builds.
  • Wide 3.7V to 5V DC power input range, compatible with standard USB power banks and adapters.
  • High-fidelity audio output with a 90dB signal-to-noise ratio (SNR) and low -70dB THD+N for clear sound.
  • Compact form factor (approx. 10x7cm) ideal for embedding into portable speakers, car audio systems, and DIY kits.

Out of stock

Description

The Blackboard VHM-314 Bluetooth 5.0 MP3 Decoder Board is a dedicated audio processing module for makers and electronics enthusiasts. It combines a Bluetooth 5.0 transceiver with an integrated MP3 decoder, enabling wireless audio streaming from smartphones or direct playback of stored audio files. The board operates on a flexible 3.7V to 5V DC supply, typically delivered via its onboard Micro USB port, making it compatible with a wide range of power sources including USB chargers and battery packs.

Engineered for clear audio reproduction, the module features a high 90dB signal-to-noise ratio and minimal total harmonic distortion plus noise (THD+N) of -70dB. Its support for standard Bluetooth audio profiles like A2DP (Advanced Audio Distribution Profile) and HFP (Hands-Free Profile) ensures compatibility with most modern devices for both music streaming and voice call applications. The compact, single-board design is ready for integration into custom enclosures for portable speakers, automotive audio upgrades, or interactive art installations.

Key Features

  • Bluetooth 5.0 wireless audio module with extended range and improved data throughput.
  • Onboard MP3 decoder chip for direct audio file playback without an external microcontroller.
  • Supports key Bluetooth profiles: A2DP for stereo audio, AVRCP for remote control, and HFP for hands-free telephony.
  • High-quality audio DAC with 90dB SNR and -70dB THD+N for clear, low-noise output.
  • Flexible power input from 3.7V to 5V DC via Micro USB or direct solder pads.
  • Compact, single-layer PCB design for easy integration into space-constrained projects.
  • Simple interface with audio line-out pads for direct connection to amplifier stages.

Applications

  • DIY Bluetooth speakers and portable audio systems.
  • Wireless audio upgrades for cars, motorcycles, or home stereos.
  • Hands-free calling kits and intercom systems.
  • Interactive toys and educational electronics kits with sound.
  • Background music players for retail displays or art installations.

Technical Specifications

Wireless ProtocolBluetooth 5.0
Supported ProfilesA2DP, AVRCP, HFP
Audio DecoderIntegrated MP3 Decoder
Supply VoltageDC 3.7V ~ 5V
Power InterfaceMicro USB
Signal-to-Noise Ratio (SNR)90 dB
Total Harmonic Distortion + Noise (THD+N)-70 dB
Dynamic Range (DNR)91 dB
Crosstalk-86 dB
Typical Operating Range> 5 meters
Item TypeDIY Kit / Module

Frequently Asked Questions

How do I power the VHM-314 Bluetooth decoder board?

The board can be powered in two ways: via the onboard Micro USB port using a standard 5V USB charger or power bank, or by applying a DC voltage between 3.7V and 5V directly to the appropriate VCC and GND solder pads on the board. Ensure your power source can provide stable current, especially when driving an external amplifier. The Micro USB port is the simplest method for prototyping and portable applications.

What Bluetooth profiles does this module support and how do I pair it?

The module supports A2DP for stereo music streaming, AVRCP for track and volume control, and HFP for hands-free phone calls. To pair, power on the board; it will enter pairing mode automatically, typically indicated by a blinking LED. Then, enable Bluetooth on your smartphone or computer, search for a new device named similarly to 'VHM-314' or 'BT AUDIO', and select it to connect. No AT commands are required for basic audio streaming functionality.

Can I play MP3 files directly from an SD card with this board?

No, this specific VHM-314 board is a Bluetooth audio receiver and decoder. It does not have an onboard SD card reader or the circuitry to read files directly from storage media. Its integrated MP3 decoder is designed to process the audio stream received via Bluetooth from your phone or computer. For standalone MP3 playback from an SD card, you would need a different module with a dedicated file player controller and storage interface.

Package Includes

  • 1 x Blackboard VHM-314 Bluetooth 5.0 MP3 Decoder Board (Micro USB)

Additional Information

Weight 0.05 kg
Dimensions 7 × 10 × 3 cm

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