Product Description
KRC-86B V4.2 is a Bluetooth audio module based on a Bluetooth chip, suitable for creating your own wireless speakers or headphones. You can control music playback/pause, up and down volume changes by connecting to your phone's Bluetooth or external buttons, and the audio output can be used with external headphones or amplifiers, supporting AUX input function. Can be used for any other purpose added to the project
Product Features
Bluetooth 4.2 version
Working voltage: 3V-5.5V
Support simultaneous connection of two devices
Pin interface: 2.00mm pin pitch 16 pin X5 pin holder
Product Functions
| 序号 Serial number | 引脚名称 Pin name | 功能描述 Function Description |
| 1 | VCC | 3V-5.5V 电源正极 Positive pole of 3V-5.5V power supply |
| 2 | GND | 接电源负极 Connect the negative pole of the power supply |
| 3 | NC | 空(无功能) Empty (no function) |
| 4 | LED+ | 接发光二极管正极(阳极) Connect the positive terminal (anode) of the light-emitting diode |
| 5 | LED- | 接发光二极管负极(阴极) Connect the negative terminal (cathode) of the light-emitting diode |
| 6 | NC | 空(无功能) Empty (no function) |
| 7 | NC | 空(无功能) Empty (no function) |
| 8 | NC | 空(无功能) Empty (no function) |
| 9 | AGND | AGND:接音频输出地线 AGND: Connect the audio output ground wire |
| 10 | OUTR | 0UTR:右声道音频输出端 OUTR: Right channel audio output terminal |
| 11 | OUTL | OUTL:左声道音频输出端 OUTL: Left channel audio output terminal |
| 12 | NC | 空(无功能) Empty (no function) |
| 13 | AGND | AGND:接音频输入地线 AGND: Connect the audio input ground wire |
| 14 | INR | 右声道音频输入端 Right channel audio input terminal |
| 15 | INL | 左声道音顿输出端 Left channel stutter output terminal |
| 16 | COM | 按钮公共端子 Button common terminal |
| 17 | RLAY/STOP | 播放/暂停 Play/Pause |
| 18 | VOL+/NEXT | 短按上一曲，长按音量增大 Short press the previous song, long press to increase volume |
| 19 | VOL-/REV | 短按下一曲，长按音量减少 Short press a song, long press to decrease volume |
| 20 | EN | 蓝牙连接后输出高电平(3.3V)，断开蓝牙低电平 Output high level (3.3V) after Bluetooth connection, disconnect Bluetooth low level |
Example of use:
The wiring of the Bluetooth amplifier board is as follows (if only using Bluetooth function to control playback, there is no need to connect buttons and audio input cables)
When the module is powered on, the Bluetooth status indicator light flashes rapidly. Turn on the phone's Bluetooth, search for the name "KRC-86B V4.2" and connect it. At this time, the status indicator light stops flashing and stays on. When playing music, it stays on
Product Size
Product Show
Payment&Transportation
Official Certificate&Certificate
Multiple product supply
Company office environment
Warehouse Real Shot
Standard packaging
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