This report examines the technical specifications, features, and operational details of the VHM-314 Bluetooth Audio Receiver Module
is a popular, low-cost Bluetooth 5.0 audio receiver module frequently used in DIY audio projects. While a formal multi-page "datasheet" from a single manufacturer can be hard to find, the technical specifications and interface details are well-documented across several supplier resources. 📋 Key Technical Specifications Bluetooth Version: 5.0 (backward compatible with 4.0, 4.1, and 4.2) Operating Voltage: 3.7V to 5V DC Power Options:
- An obsolete or proprietary part (e.g., from a defunct brand or custom OEM component)
- A misremembered number (e.g., VHM‑314 could be a variant of a VHM series magnetic sensor, Hall effect module, or hybrid IC)
- A house number (used internally by a company like Siemens, Thomson, or a defense/aerospace supplier)
- Is it a 3-pin transistor? It’s likely a voltage regulator or switch.
- Is it a 4-pin IC (SOT-143)? It might be an RF transistor or reset IC.
- Is it a round can (TO-92)? It could be a Hall effect sensor (VHM often implies "Very High sensitivity Magnet").
- Hall Effect Sensor: Most commonly, the VHM 314 is used as a linear Hall Effect sensor. It detects magnetic field density and converts it into a proportional analog voltage. This makes it ideal for current sensing, position detection, and brushless DC motor commutation.
- Voltage Reference Module: In some schematics, the VHM 314 appears as a low-dropout precision voltage reference, used in data acquisition systems.
- Industrial Interface IC: It is also known to function as a protective interface for 4-20mA current loops in industrial automation.