> For the complete documentation index, see [llms.txt](https://longer-vision-robot.gitbook.io/arduino-full-stack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://longer-vision-robot.gitbook.io/arduino-full-stack/09_switches/017_switch_ball.md).

# 9.3 Switch - Ball

## Hardware Wiring

![Ball](https://2341898987-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LCFDbcteyTR3tQSs-5x%2F-LCFE4dCRQBMq1ajywfh%2F-LCFEVsF6JSMaDNcuQVk%2F017_switch_ball.jpg?generation=1526059635904339\&alt=media)

## Sketch

The code can be found at [Examples\_Arduino - sensor-kit-for-arduino - \_017\_Switch\_Ball - \_017\_Switch\_Ball.ino](https://github.com/LongerVisionRobot/Examples_Arduino/blob/master/sensor-kit-for-arduino/_017_Switch_Ball/_017_Switch_Ball.ino).

```
int Led=13;       // Define LDE Pin
int buttonpin=3;  // Define Switch's pin
int val;          // Define Variable val
void setup()
{
  pinMode(Led,OUTPUT);  // Define LED as output
  pinMode(buttonpin,INPUT); // Define switch as input
}
void loop()
{
  val=digitalRead(buttonpin); // Assign digital pin's reading to val
  if(val==HIGH) // if switch pressed, LED starts flashing
  {
    digitalWrite(Led,HIGH);
  }
  else
  {
    digitalWrite(Led,LOW);
  }
}
```