Project 12: Knock Sensor Module

1.Introduction

This module is a knock sensor. When you knock it, it can send a momentary signal. We can combine it with Arduino to make some interesting experiment, e.g. electronic drum

2.Specification

• Working voltage: 5V

• Size: 30*20mm

• Weight: 3g

3.Connection Diagram

4.Sample Code

int Led=13;//define LED interface
int Shock=3//define knock sensor interface;
int val;//define digital variable val

void setup()
{
    pinMode(Led,OUTPUT);//define LED to be output interface
    pinMode(Shock,INPUT);//define knock sensor to be output interface
}
void loop()
{
    val=digitalRead(Shock);//read the value of interface3 and evaluate it to val
    if(val==HIGH)//when the knock sensor detect a signal, LED will be flashing
    {
    	digitalWrite(Led,LOW);
    }
    else
    {
    	digitalWrite(Led,HIGH);
    }
}