Executing Code With a Switch


I'm new to using arduino, and I'm currently in the process of creating a track, where a marble rolls down onto a copper switch. When the marble is on the switch, it executes the code to turn on a LED. I don't understand how to execute the code using the switch. I know this is quite vague, but any help would be useful right now. Thanks.

Have you written any sketches yet? If not you should start by running some of the simple example sketches included in the arduino Ide. You should study the code examples to see how the functions work and slowly but steadily you will soon be able to write your own simple sketches. The arduino was never designed to be a plug and play solution for peoples projects, but rather a simple by effective platform where one could acquire the knowledge and experience to create their own projects.

 Turns on and off a light emitting diode(LED) connected to digital  
 pin 13, when pressing a pushbutton attached to pin 2. 
 The circuit:
 * LED attached from pin 13 to ground 
 * pushbutton attached to pin 2 from +5V
 * 10K resistor attached to pin 2 from ground
 * Note: on most Arduinos there is already an LED on the board
 attached to pin 13.
 created 2005
 by DojoDave <http://www.0j0.org>
 modified 30 Aug 2011
 by Tom Igoe
 This example code is in the public domain.

// constants won't change. They're used here to 
// set pin numbers:
const int buttonPin = 2;     // the number of the pushbutton pin
const int ledPin =  13;      // the number of the LED pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);      
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);     

void loop(){
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH) {     
    // turn LED on:    
    digitalWrite(ledPin, HIGH);  
  else {
    // turn LED off:
    digitalWrite(ledPin, LOW); 

Do you execute code with a kill switch?

Sorry, couldn't resist


Do you execute code with a kill switch?

No, YOU use a DEAD MAN's switch in case you pass out from exhaustion.