1 x vibration sensor switch 1 x 10k ohm resistor 1 LED 1 x Arduino Uno 1 x breadboard jumper wires
/* Better Debouncer * * This debouncing circuit is more rugged, and will work with tilt switches! * * http://www.ladyada.net/learn/sensor/tilt.html */ int inPin = 2; // the number of the input pin int outPin = 13; // the number of the output pin int LEDstate = HIGH; // the current state of the output pin int reading; // the current reading from the input pin int previous = LOW; // the previous reading from the input pin // the follow variables are long's because the time, measured in miliseconds, // will quickly become a bigger number than can be stored in an int. long time = 0; // the last time the output pin was toggled long debounce = 50; // the debounce time, increase if the output flickers void setup() { Serial.begin(9600); pinMode(inPin, INPUT); digitalWrite(inPin, HIGH); // turn on the built in pull-up resistor pinMode(outPin, OUTPUT); } void loop() { int switchstate; reading = digitalRead(inPin); Serial.println( reading ); // If the switch changed, due to bounce or pressing... if (reading != previous) { // reset the debouncing timer time = millis(); } if ((millis() - time) > debounce) { // whatever the switch is at, its been there for a long time // so lets settle on it! switchstate = reading; // Now invert the output on the pin13 LED if (switchstate == HIGH) LEDstate = LOW; else LEDstate = HIGH; } digitalWrite(outPin, LEDstate); // Save the last reading so we keep a running tally previous = reading; }