This is a project that utilizes a switch to tell whether a door is open or not. It can be used on a refrigerator door or the exterior door of your house to help make sure that you are not wasting too much energy by leaving the door open. When the switch is open (meaning the door is open), the blue light starts to flash faster and faster and it says "Door is open", as you wait longer the green LED flashes and it says "You should close the door soon", finally the red light flashes and tells you "CLOSE THE DOOR NOW!! You are wasting energy". IF the switch is depressed (the door is closed), nothing happens and the energy fairy is happy.
http://www.youtube.com/watch?v=JIuhFRF08JY
/*
* Switch and LED test program
*/
int redLED = 9; // RedLED is connected to pin 9
int greenLED = 11; // GreenLED is connected to pin 11
int blueLED = 13; // BlueLED is connected to pin 13
int switchPin = 2; // switch is connected to pin 2
int val; // variable for reading the pin status
int delayAmount = 1000; // number of milliseconds to wait
void setup() {
pinMode(redLED, OUTPUT); // Set the redLED pin as output
pinMode(greenLED, OUTPUT); // Set the blueLED pin as output
pinMode(blueLED, OUTPUT); // Set the blueLED pin as output
pinMode(switchPin, INPUT); // Set the switch pin as input
}
void loop(){
val = digitalRead(switchPin); // read input value and store it in val
if (val == HIGH) { // check if the button is pressed
Serial.begin(9600);
Serial.println("The Door is Open");
digitalWrite(blueLED, HIGH); // turn blue LED on
delay(1000);
digitalWrite(blueLED, LOW); // turn blue LED off
delay(1000);
digitalWrite(blueLED, HIGH); // turn blue LED on
delay(900);
digitalWrite(blueLED, LOW); // turn blue LED off
delay(900);
digitalWrite(blueLED, HIGH); // turn blue LED on
delay(600);
digitalWrite(blueLED, LOW); // turn blue LED off
delay (600);
digitalWrite(blueLED, HIGH); // turn blue LED on
delay (200);
digitalWrite(blueLED, LOW); // turn blue LED off
delay (200);
digitalWrite(blueLED, HIGH); // turn blue LED on
delay (200);
digitalWrite(blueLED, LOW); // turn blue LED off
delay (200);
Serial.begin(9600);
Serial.println("You should close the door soon.");
digitalWrite(greenLED, HIGH); // turn green LED on
delay(1000);
digitalWrite(greenLED, LOW); // turn green LED off
delay(1000);
digitalWrite(greenLED, HIGH); // turn green LED on
delay(900);
digitalWrite(greenLED, LOW); // turn green LED off
delay(900);
digitalWrite(greenLED, HIGH); // turn green LED on
delay(600);
digitalWrite(greenLED, LOW); // turn green LED off
delay (600);
digitalWrite(greenLED, HIGH); // turn green LED on
delay (200);
digitalWrite(greenLED, LOW); // turn green LED off
delay (200);
digitalWrite(greenLED, HIGH); // turn green LED on
delay (200);
digitalWrite(greenLED, LOW); // turn green LED off
delay (200);
Serial.begin(9600);
Serial.println("CLOSE THE DOOR NOW!!! You are wasting energy!");
digitalWrite(redLED, HIGH); // turn red LED on
delay(1000);
digitalWrite(redLED, LOW); // turn red LED off
delay(1000);
digitalWrite(redLED, HIGH); // turn red LED on
delay(900);
digitalWrite(redLED, LOW); // turn red LED off
delay(900);
digitalWrite(redLED, HIGH); // turn red LED on
delay(600);
digitalWrite(redLED, LOW); // turn red LED off
delay (600);
digitalWrite(redLED, HIGH); // turn red LED on
delay (200);
digitalWrite(redLED, LOW); // turn red LED off
delay (200);
digitalWrite(redLED, HIGH); // turn red LED on
delay (200);
digitalWrite(redLED, LOW); // turn red LED off
delay (200);
}
else (val == LOW); { // check if the button is not pressed
digitalWrite(blueLED, LOW); // turn blue LED off
digitalWrite(greenLED, LOW); // turn green LED off
digitalWrite(redLED, LOW); // turn red LED off
Serial.begin(9600);
Serial.println("The door is currently closed");
}
}
