查看“Noise Alarm”的源代码

{{Language|Noise Alarm}}
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==Objective==
When noise reaches a certain value around you, the alarm goes off. 


==Principle==

==Equipment==
{|class="wikitable"
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|Module||Number||Function
|-
|[[Microduino-CoreUSB]]||1||Core board 
|-
|[[Microduino-Sensorhub]]||1||Sensor pinboard 
|-
|[[Microduino-Mic]]||1||Sound detection sensor  
|-
|[[Microduino-Crash]]||1||Crash/touch switch 
|-
|[[Microduino-BUZZER]]||1||Buzzer sensor  
|-
| [[Microduino-BM]]||1||Battery management  
|}

 [[File: Noise_alarm.jpg|600px|center|thumb]]

==Hardware Buildup==
*Setup 1：Connect CoreUSB to your PC, open program example, choose the right board and download program via the serial port.

[[File: Noise_alarm_setup_1.jpg|600px|center|thumb]]
*Setup2：Connect Mic to the A0 pin of Sensorhub, buzzer to D6 and crash sensor to D4. 
[[file:Microduino-sensorhub_rule.JPG|thumb|800px|center]]
[[file: Noise_alarm_sensor.JPG|thumb|800px|center]]
*Setup6：Connect battery to BM. 
[[file: Noise_alarm _bm.JPG|thumb|800px|center]]

==Software Debugging==
*Build IDE, connect CoreUSB to your PC and download program code. 
[https://github.com/Microduino/Microduino_Tutorials/blob/master/MCookie_Tutorial/Noise_alarm/Noise_alarm.ino Noise_alarm]
Code description 
*Control pin description 
<source lang="cpp">
#define mic_pin A0
#define buzzer_pin 6
#define key_pin 4 </source>

*Sound pre-set value  
<source lang="cpp">
  #define voice 400
</source>
*If the sound value is greater than the preset value in one second, then the buzzer will give an alarm. 
<source lang="cpp">
    if (voice_data > voice)
  {
    if (millis() - time > 1000 )
    {
      voice_data = analogRead(mic_pin);
      if (voice_data > voice)
      {
        buzzer_speak = true;
        i = 200;
      }
      time = millis();
    }
  }
</source>
*Touch the key to close the sound. 
<source lang="cpp">
      if (key_get(key_pin, 0))
  {
    delay(200);
    buzzer_speak = false;
    time = millis();
  }
</source>

==Result==
If the sound around you exceeds the default value within one second, the alarm will go off. You can press the key and close the sound. (You can also build a beautiful cover with LEGO.) 
==Video==

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