BK3266 Bluetooth 5.0 Stereo Audio Receiver Module
The BK3266 is a highly integrated Bluetooth audio module designed for high-quality stereo sound transmission. It supports Bluetooth 5.0 and is commonly used to convert wired speakers, headphones, or car audio systems into wireless receivers. The module includes integrated flash memory for firmware storage and supports various audio profiles, making it a versatile choice for DIY wireless audio projects.
Product Features
- Bluetooth 5.0 Compliance: Improved connection stability and lower power consumption compared to older versions.
- Stereo Output: Provides Left and Right analog audio channels ready for amplification.
- Hands-Free Support: Integrated microphone input pins allow for the creation of Bluetooth headsets or speakerphones.
- Onboard Controls: Supports physical buttons for Volume Up/Down, Play/Pause, and Track Navigation.
- Status Indicators: Dedicated pins for LED status lights to show pairing, connection, and power states.
- Compact SMT Design: Small footprint with castellated holes suitable for surface mount production or manual soldering.
Technical Specifications
- Bluetooth Version: V5.0
- Operating Voltage: 3.3V – 4.2V DC (Can be powered by a 3.7V LiPo battery)
- Audio Output: Differential Analog Stereo
- Operating Current: <20mA (Active), <2mA (Standby)
- Profiles Supported: A2DP, AVRCP, HFP
- Output Power: Class 2 (+4dBm max)
- Dimensions: 25mm x 13.5mm
Pinout Reference
| Pin Name | Function | Description |
|---|---|---|
| VBAT | Power | 3.3V to 4.2V Input |
| GND | Ground | Common Ground |
| LP / LN | Left Audio | Left Channel Positive / Negative (Differential) |
| RP / RN | Right Audio | Right Channel Positive / Negative (Differential) |
| MIC P / N | Microphone | Input for external electret microphone |
| KEY | Button Input | Control inputs for Play/Pause, Vol+, Vol- |
Package Contents
- 1 BK3266 Bluetooth Stereo Audio Module