Difference between revisions of "BakeBit - Sound Sensor/zh"

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|SIG  || 信号
 
|SIG  || 信号
 
|}
 
|}
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== 示例程序：Sound Sensor ==
 +
 +
这个示例用Sound Sensor实现一个声控开关，当检测到环境声音达到指定的分贝时，点亮LED。
 +
 +
=== 硬件连接 ===
 +
简单的将 Sound Sensor 模块插入 A0 接口，将 LED 插入 D5 接口，如下面这样：
 +
 +
::{| class="wikitable"
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|-
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|[[File:Sound Sensor-1.jpg |frameless|300px]]    || [[File:Sound Sensor-2.jpg |frameless|300px]]
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|-
 +
|}
 +
 +
=== 示例源代码 ===
 +
 +
<syntaxhighlight lang="python">
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import time
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import bakebit
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 +
# Connect the BakeBit Sound Sensor to analog port A0
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# SIG,NC,VCC,GND
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sound_sensor = 0
 +
 +
# Connect the BakeBit LED to digital port D5
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# SIG,NC,VCC,GND
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led = 5
 +
 +
bakebit.pinMode(sound_sensor,"INPUT")
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bakebit.pinMode(led,"OUTPUT")
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 +
# The threshold to turn the led on 400.00 * 5 / 1024 = 1.95v
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threshold_value = 400
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 +
while True:
 +
    try:
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        # Read the sound level
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        sensor_value = bakebit.analogRead(sound_sensor)
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 +
        # If loud, illuminate LED, otherwise dim
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        if sensor_value > threshold_value:
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            bakebit.digitalWrite(led,1)
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        else:
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            bakebit.digitalWrite(led,0)
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 +
        print("sensor_value = %d" %sensor_value)
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        time.sleep(.2)
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 +
    except IOError:
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        print ("Error")
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</syntaxhighlight>
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 +
[https://github.com/friendlyarm/BakeBit/blob/master/Software/Python/bakebit_sound_sensor.py Github]
 +
 +
 +
=== 运行示例 ===
 +
 +
假设你已经参考[http://wiki.friendlyarm.com/bakebit bakebit教程]安装了BakeBit源代码，<br />
 +
要运行示例程序，可以在开发板上进入 BakeBit/Software/Python目录,运行bakebit_sound_sensor.py:
 +
<syntaxhighlight lang="bash">
 +
cd ~/BakeBit/Software/Python
 +
sudo python bakebit_sound_sensor.py
 +
</syntaxhighlight>
 +
 +
=== 运行结果 ===
 +
 +
对着声音传感器制造点声音，例如拍打手掌，LED将被亮起。
 +
 +
==相关资料==
 +
*[Schematic]([http://wiki.friendlyarm.com/wiki/images/f/ff/02-SCHEMATIC_Sound_Sensor.pdf BakeBit - Sound Sensor.pdf])
 +
*[BakeBit Github项目](https://github.com/friendlyarm/BakeBit)
 +
*[BakeBit Starter Kit手册](http://wiki.friendlyarm.com/bakebit/bakebit_starter_kit_manual_cn.pdf)

Latest revision as of 10:19, 28 November 2016

English

1 介绍

Sound Sensor
  • BakeBit - Sound Sensor是一个声音检测模块，用于检测声音信号。模块使用了一个内置对声音敏感的电容式驻极体话筒检测声波信号，声波使话筒内的驻极体薄膜振动，导致电容的变化，而产生与之对应变化的微小电压，经过LM358放大后输出。
  • 在默认状态下模块输出高电平，当检测到有声音的时候输出低电平，声音消失后恢复高电平，没有延时。

2 特性

  • 使用标准的2.0mm 4 Pin BakeBit接口

BakeBit - Sound Sensor

  • 引脚说明:
名称 描述
GND 地
5V 电源5V
NC 空
SIG 信号

3 示例程序：Sound Sensor

这个示例用Sound Sensor实现一个声控开关，当检测到环境声音达到指定的分贝时，点亮LED。

3.1 硬件连接

简单的将 Sound Sensor 模块插入 A0 接口，将 LED 插入 D5 接口，如下面这样：

Sound Sensor-1.jpg Sound Sensor-2.jpg

3.2 示例源代码

import time
import bakebit
 
# Connect the BakeBit Sound Sensor to analog port A0
# SIG,NC,VCC,GND
sound_sensor = 0
 
# Connect the BakeBit LED to digital port D5
# SIG,NC,VCC,GND
led = 5
 
bakebit.pinMode(sound_sensor,"INPUT")
bakebit.pinMode(led,"OUTPUT")
 
# The threshold to turn the led on 400.00 * 5 / 1024 = 1.95v
threshold_value = 400
 
while True:
    try:
        # Read the sound level
        sensor_value = bakebit.analogRead(sound_sensor)
 
        # If loud, illuminate LED, otherwise dim
        if sensor_value > threshold_value:
            bakebit.digitalWrite(led,1)
        else:
            bakebit.digitalWrite(led,0)
 
        print("sensor_value = %d" %sensor_value)
        time.sleep(.2)
 
    except IOError:
        print ("Error")

Github


3.3 运行示例

假设你已经参考bakebit教程安装了BakeBit源代码，
要运行示例程序，可以在开发板上进入 BakeBit/Software/Python目录,运行bakebit_sound_sensor.py: 

cd ~/BakeBit/Software/Python
sudo python bakebit_sound_sensor.py

3.4 运行结果

对着声音传感器制造点声音，例如拍打手掌，LED将被亮起。

4 相关资料

Retrieved from "https://wiki.friendlyelec.com/wiki/index.php?title=BakeBit_-_Sound_Sensor/zh&oldid=8057"