Home cutting scanning  circuits programs academy progress final project

For this task I was to turn on a light normally (with a push button) and then switch it off again.

#define LED 13                      //pin for LED

#define BUTTON  7                // pin for switch


int val = 0;                          // setting val as a memory

int old_val = 0;                    // setting another memory

int state = 0;                      //state of the LED


void setup(){

  pinMode(LED, OUTPUT);      // setting the direction for LED

  pinMode (BUTTON, INPUT);   //setting the direction for BUTTON

}

void loop(){

  val = digitalRead(BUTTON);    //read the button

  if ((val == HIGH) && (old_val == LOW)){

  state =1 - state;

  }

  

  old_val = val;    // val is now old so lets store it

  

  if (state == 1) {

    digitalWrite(LED, HIGH);  // turn on LED

  } else {

    digitalWrite(LED, LOW);

  }

}

This time not only do I have a double == to get to grips with but also a &&, but as before this is just a way of bringing in an and function with a condition. The basic layout of the program is relatively easy to follow