Amazing Applications of Tilt Sensors

1int inPin = 2; // the number of the input pin
2int outPin = 13; // the   number of the output pin
3
4int LEDstate = HIGH; // the current state of the   output pin
5int reading; // the current reading from the input pin
6int previous   = LOW; // the previous reading from the input pin
7
8// the follow variables   are long's because the time, measured in milliseconds,
9// will quickly become   a bigger number than can be stored in an int.
10long time = 0; // the last time   the output pin was toggled
11long debounce = 50; // the debounce time, increase   if the output flickers
12
13void setup()
14{
15pinMode(inPin, INPUT);
16digitalWrite(inPin,   HIGH); // turn on the built in pull-up resistor
17pinMode(outPin, OUTPUT);
18}
19
20void   loop()
21{
22int switchstate;
23
24reading = digitalRead(inPin);
25
26// If   the switch changed, due to bounce or pressing...
27if (reading != previous) {
28//   reset the debouncing timer
29time = millis();
30} 
31
32if ((millis() - time)   > debounce) {
33// whatever the switch is at, its been there for a long time
34//   so lets settle on it!
35switchstate = reading;
36
37// Now invert the output   on the pin13 LED
38if (switchstate == HIGH)
39LEDstate = LOW;
40else
41LEDstate   = HIGH;
42}
43digitalWrite(outPin, LEDstate);
44
45// Save the last reading   so we keep a running tally
46previous = reading;
47}

1int inPin = 2; // the number of the input pin
2int outPin = 13; // the  number of the output pin
3
4int LEDstate = HIGH; // the current state of the  output pin
5int reading; // the current reading from the input pin
6int previous  = LOW; // the previous reading from the input pin
7
8// the follow variables  are long's because the time, measured in milliseconds,
9// will quickly become  a bigger number than can be stored in an int.
10long time = 0; // the last time  the output pin was toggled
11long debounce = 50; // the debounce time, increase  if the output flickers
12
13void setup()
14{
15pinMode(inPin, INPUT);
16digitalWrite(inPin,  HIGH); // turn on the built in pull-up resistor
17pinMode(outPin, OUTPUT);
18}
19
20void  loop()
21{
22int switchstate;
23
24reading = digitalRead(inPin);
25
26// If  the switch changed, due to bounce or pressing...
27if (reading != previous) {
28//  reset the debouncing timer
29time = millis();
30} 
31
32if ((millis() - time)  > debounce) {
33// whatever the switch is at, its been there for a long time
34//  so lets settle on it!
35switchstate = reading;
36
37// Now invert the output  on the pin13 LED
38if (switchstate == HIGH)
39LEDstate = LOW;
40else
41LEDstate  = HIGH;
42}
43digitalWrite(outPin, LEDstate);
44
45// Save the last reading  so we keep a running tally
46previous = reading;
47}