HW-770 Mini Bluetooth 4.1 Audio Receiver MP3 Module

HW-770 Bluetooth 4.1 Audio Receiver Overview

The HW-770 Mini Bluetooth 4.1 Audio Receiver MP3 Module is a compact wireless audio board designed for converting Bluetooth audio from smartphones, tablets, and other devices into stereo analog output. Built for DIY and retrofit audio projects, this module combines reliable Bluetooth 4.1 connectivity with MP3 decoding to provide a versatile solution for portable speakers, home audio systems, and car audio integration.

Key Features

• Bluetooth 4.1 connectivity for stable and low-latency wireless audio reception
• Stereo L/R analog audio output compatible with most amplifiers and speaker systems
• Built-in MP3 playback support for local file audio when used with compatible storage or control interfaces
• Compact mini board format for embedded and portable applications
• Simple wiring and onboard control interface (model dependent) for easy integration
• Low distortion audio designed to deliver clear sound in consumer and DIY audio projects

Technical Specifications

• Model: HW-770
• Bluetooth Version: 4.1
• Audio Output: Stereo L/R analog output
• Input Voltage: Typically 3.7V to 5V DC (use a regulated supply)
• Interface: Bluetooth wireless audio
• Control: Onboard control interface (features vary by module revision)
• Audio Format Support: MP3 and standard Bluetooth audio codecs
• Board Size: Mini compact module suitable for tight spaces

Applications

• DIY Bluetooth speakers and portable music players
• Wireless audio receivers for home and commercial audio systems
• Car audio Bluetooth integration and retrofit projects
• Embedded audio in amplifiers and electronics projects
• Repair and upgrade of existing audio devices

Advantages of Using the HW-770 Module

• Stable and reliable Bluetooth audio reception with broad device compatibility
• Compact design that fits into small enclosures and projects
• Quick to install with straightforward wiring and common voltage range
• Supports MP3 playback for standalone audio applications when paired with compatible control/storage
• Cost effective solution for DIY, repair, and prototyping use cases

Installation and Wiring Tips

• Power the module with a regulated 3.7V to 5V DC supply and confirm polarity before connecting
• Connect the stereo L and R outputs to your amplifier input or speaker input through appropriate coupling capacitors if required
• Keep signal wiring short to minimize noise and interference; use shielded cable for longer runs
• Pair the module from your Bluetooth-capable device by enabling Bluetooth and selecting the HW-770 device name shown during pairing
• Refer to the specific module revision documentation for onboard control pinouts and MP3 interface instructions

Safety and Usage Notes

• Use a regulated power supply within the recommended voltage range to avoid damage
• Ensure correct polarity when connecting power to prevent component failure
• Avoid exposing the board to moisture, condensation, or direct liquid contact
• Prevent short circuits by mounting the board with standoffs and insulating exposed solder points

Quick Start

1. Provide a stable 3.7V to 5V DC power source and connect to the module power pins.
2. Connect stereo L and R outputs to your amplifier or speaker input.
3. Enable Bluetooth on your smartphone or source device and search for the HW-770 device name.
4. Pair and play audio. Adjust amplifier volume and source volume for optimal level.

Compatibility and Notes

The HW-770 is broadly compatible with most Bluetooth-enabled devices supporting audio streaming. Actual module appearance, PCB layout, and control features may vary between production batches. Images and illustrations are for reference purposes only.