VHM-314 Bluetooth 5.0 Stereo Music Decoder Board Type-C

VHM-314 Bluetooth 5.0 Stereo Music Decoder Board is an ultra-compact, high-fidelity audio receiver designed to upgrade standard wired speakers or amplifiers into wireless sound systems. This module utilizes the advanced Bluetooth 5.0 protocol to ensure a stable, long-range connection with minimal latency and high data throughput. Furthermore, the board features an integrated 3.5mm stereo jack and solder pads, allowing for versatile installation in DIY projects. Users can power the device via a Type-C cable or a 3.7V lithium battery, which makes it an ideal choice for portable applications. Consequently, this decoder board provides a cost-effective and professional-grade solution for anyone seeking to implement wireless audio streaming with ease.

Key Features:

• Bluetooth 5.0 Technology: The latest Bluetooth standard ensures faster pairing, improved range, and backward compatibility with older versions.
• Dual Power Input: The module supports both Type-C 5V power and external 3.7V lithium battery soldering points for maximum flexibility.
• Stereo Output: It delivers high-quality two-channel stereo sound through a standard 3.5mm audio interface or direct solder pads.
• Auto-Reconnect Feature: The system automatically pairs with previously connected devices upon power-up, improving the user experience.
• Status Indicator: An onboard LED provides real-time feedback on power status and Bluetooth pairing connectivity.

Technical Specifications:

• Bluetooth Version: V5.0 (Compatible with V4.2, V4.1, V4.0)
• Signal-to-Noise Ratio (SNR): 90 dB
• Total Harmonic Distortion + Noise (THD+N): −70 dB
• Crosstalk: −86 dB
• Dynamic Range (DNR): 91 dB
• Supported Formats: A2DP, AVCTP, AVDTP, AVRCP, HFP
• Transmission Distance: ≈ 15 meters (unobstructed)
• Input Voltage: 3.7 V to 5 V DC

Mechanical Specifications:

• PCB Material: High-grade FR-4 glass fiber
• Output Connectors: 3.5mm Audio Jack and Left/Right/Ground solder pads
• Power Interface: Type-C socket and Battery (+) / (−) pads
• Installation Type: Surface mount or through-hole integration

Dimensions:

• Length: ≈ 30.0 mm
• Width: ≈ 30.0 mm
• Total Thickness: ≈ 8.0 mm (including audio jack)
• Weight: ≈ 5.0 g

Pinout and Wiring:

• Type-C Port: Primary 5V power input for standard adapters.
• BAT+ / BAT-: Secondary input for 3.7V Lithium batteries (ensure correct polarity).
• L / G / R (Pads): Left Channel, Ground, and Right Channel output pads for hardwiring to an internal amplifier.
• 3.5mm Jack: Standard audio output for headphones or AUX cables.
• Wiring Note: However, users should avoid using the Type-C and battery inputs simultaneously to prevent damage to the charging circuit or battery.

Datasheet Reference:

• Download VHM-314 Bluetooth Decoder Module Reference Guide

Commonly Used in:

• Portable Bluetooth Speakers: Serving as the wireless core for small, battery-powered audio devices.
• Car Audio Upgrades: Adding wireless streaming capability to older vehicle head units via the AUX input.
• DIY Audio Projects: Building custom soundbars or restoring vintage radios with modern connectivity.

Applications:

• Wireless Audio Systems: Converting active speakers into Bluetooth-enabled peripherals.
• Headphone Amplifiers: Providing a wireless signal source for high-quality wired headphones.
• Smart Home Integration: Acting as an audio receiver for multi-room sound setups.

Equivalent Models:

• XY-WRBT: A similar Bluetooth 5.0 module with an integrated volume control wheel.
• BT625: A generic alternative offering similar 5.0 decoding capabilities in a slightly different form factor.
• M28 / M18 / M38: Popular Bluetooth audio receiver modules that utilize the same chipsets, therefore providing nearly identical audio performance.

Package Includes:

• 1 x VHM-314 Bluetooth 5.0 Stereo Music Decoder Board Type-C