This shock sensor Arduino compatible uses an SW-18015P switch to detect shocks, vibrations, and impacts. It can be used to build a simple LED circuit that lights up when an impact is detected.

The switch primarily consists of a terminal that forms a center post and a second terminal that is a spring that surrounds the center post. When a sufficient force is transferred to the switch, the terminal consisting of the spring moves and shorts both terminals together momentarily.

Generally the switch should be located as close as possible to the area being monitored. Otherwise, the vibration may be dampened by other structural components in your project. Conversely, if you find that the switch is too sensitive for your application try moving the switch further away from the area of interest to decrease sensitivity.

Test Code

int Led = 13; // define LED Interface
int Shock = 3; // define the vibration sensor interface
int val; // define numeric variables val

void setup () {
pinMode(Led, OUTPUT); // define LED as output interface
pinMode(Shock, INPUT); // output interface defines vibration sensor
}

void loop () {
val = digitalRead(Shock); // read digital interface is assigned a value of 3 val

// When the shock sensor detects a signal, LED flashes
if (val == HIGH) {
digitalWrite(Led, LOW);
}
else {
digitalWrite(Led, HIGH);
}
}