### Project 9 Sound-controlled Light

**1.Introduction**

Sound sensor is used to detect the intensity of ambient sound; the intensity is proportional to output voltage.

In this project, we use graphical programming to read out analog value of sound intensity measuring by sound module, ranging from 0 to 1023. And then map the value to 0-255, displaying on serial monitor. Finally set the mapped value as PwM value to control brightness of LED.

**2.Materials Required**

1. KEYESTUDIO UNO Control Board *1
2. V5 Sensor Shield*1
3. Piranha LED*1
4. Sound Module*1
5. Female to Female Dupont Line*6

**3.Connection Diagram**

![](media/image-20251201161551216.png)

![](media/image-20251201161746396.png)

**4.Sample Code**

```c
int _ABVAR_1_sound_value = 0 ;

void setup()
{
  pinMode( 11 , OUTPUT);
  Serial.begin(9600);
}

void loop()
{
  _ABVAR_1_sound_value = 0 ;
  _ABVAR_1_sound_value = ( _ABVAR_1_sound_value + analogRead(0) ) ;
  analogWrite(11 , map ( _ABVAR_1_sound_value , 0 , 1023 , 0 , 255 ) );
  Serial.print("sound val:");
  Serial.print(_ABVAR_1_sound_value);
  Serial.println();
}
```

**5.Result**

After downloading program, have a look at values on serial monitor.

![](media/image-20251201161834780.png)