Difference between revisions of "BakeBit - Sound Sensor/zh"
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|SIG || 信号 | |SIG || 信号 | ||
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| − | ==硬件连接== | + | == 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" | ||
| + | |- | ||
| + | |[[File:Sound Sensor-1.jpg |frameless|300px]] || [[File:Sound Sensor-2.jpg |frameless|300px]] | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | === 示例源代码 === | ||
| + | |||
| + | <syntaxhighlight lang="python"> | ||
| + | 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") | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | [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。 | ||
| − | |||
| − | |||
==代码说明== | ==代码说明== | ||
==相关资料== | ==相关资料== | ||
*[Schematic]([http://wiki.friendlyarm.com/wiki/images/f/ff/02-SCHEMATIC_Sound_Sensor.pdf BakeBit - Sound Sensor.pdf]) | *[Schematic]([http://wiki.friendlyarm.com/wiki/images/f/ff/02-SCHEMATIC_Sound_Sensor.pdf BakeBit - Sound Sensor.pdf]) | ||
Revision as of 10:15, 28 November 2016
1 介绍
- 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
- 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：
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")
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 代码说明
5 相关资料
- [Schematic](BakeBit - Sound Sensor.pdf)
