### Project 4 Button-controlled LED

**1.Introductio**

Button is a common control electrical apparatus element,used to turn-on or turn-off circuit, as a switch of controlling motor or operating other device.

In this project, we use graphical programming to control LED turning on or off.

**2.Materials Required**

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

**3.Connection Diagram**

![](media/image-20251201155843933.png)

![](media/image-20251201155902400.png)

**4.Sample Code**

```c
void setup()
{
  pinMode( 4 , INPUT);
  pinMode( 10 , OUTPUT);
}

void loop()
{
  if (( digitalRead(4) && HIGH ))
  {
    digitalWrite( 10 , HIGH );
    delay( 50 );
  }
  else
  {
    digitalWrite( 10 , LOW );
    delay( 50 );
  }
}
```

**5.Result**

After finishing downloading, we can control LED by button module.