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用户手册(Sound-Sensor-UserManual).pdf

发布时间：2023-11-29 发布人：admin 分类：养殖 资料大小：0.12M 资料格式：pdf 举报 版权申诉
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    Sound Sensor 用户手册 微雪电子 Sound Sensor 用户手册 1. 产品特性 音频放大芯片 LM386(放大 200 倍) 工作电压 产品尺寸 固定孔尺寸 3.3V-5.3V 39.0mm*21.0mm 2.0mm 表1. 产品特性 原理：LM386 是一种音频集成功率放大器，具有自身功耗低、更新内链增益 可调整、电源电压范围大、外接元件少和总谐波失真小等优点。主要应用于 低电压消费类产品。为使外围元件最少,电压增益内置为 20。在 1 脚和 8 脚 之间增加一只外接电阻和电容，便可将电压增益调为 200 以内的任意值。 2. 主要用途 检测周围环境声音的有无和判断声音强度的大小 3. 接口说明 引脚号 1 2 3 4 标识 DOUT AOUT GND VCC 描述 数字量输出 模拟量输出 电源地 电源正(3.3V-5.3V) 表2. 接口说明 4. 操作与现象 下面，以接入我们的开发板为例。 ① 将配套程序下载到相应的开发板中。 ② 将串口线和模块接入开发板，给开发板上电，打开串口调试软件。 模块与开发板连接如下表所示： 端口 STM32 单片机引脚 GPIOA.4 GPIOA.6 DOUT AOUT GND VCC GND 3.3V 表3. 模块接入 STM32 开发板 1
    Sound Sensor 用户手册 微雪电子 端口 DOUT AOUT GND VCC Arduino 引脚 D2 A0 GND 5V 表4. 模块接入 Arduino 串口配置如下表所示： Baud rate Data bits Stop bit 115200 8 1 Parity bit None 表5. 串口配置 ③ 当模块的咪头靠近发声源时，模块上的信号指示灯点亮。 当模块的咪头远离发声源时，模块上的信号指示灯熄灭。 随着传感器与发声源距离的变化，串口输出数据有相应的变化。 2
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