Description:
The Tap-Hit Knocking Sensor Module, detects the knocks and the taps. It can work like a switch. The sensor sends data momentarily to the board. To keep the LED on, the button state change codes should be used. So the sensor will work as a switch.
It is a vibration sensor that sends a signal when a knock/tap is detected. Compatible with Arduino, ESP8266, ESP32, Teensy, Raspberry Pi, and other popular platforms.
Specification:
- Single channel signal output
- Convenient to installÂ
- Circuit board output switch
- Working voltage: DC 3~5V;
- Great for teaching demonstration or product development
CONNECTION DIAGRAM
Connect the module’s Power line (middle) and the ground (-) to +5 and GND respectively.
Connect signal (S) to pin 3 on the Arduino.
| KY-031 | Arduino |
|---|---|
| S | Pin 3 |
| middle | +5V |
| – | GND |
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Code
 The following sketch will turn on the LED on the Arduino’s pin 13 when the module detects vibration caused by knocking or tapping the sensor.
int Led = 13; // LED on Arduino board
int Shock = 3; // sensor signal
int val; // numeric variable to store sensor status
void setup()
{
pinMode(Led, OUTPUT); // define LED as output interface
pinMode(Shock, INPUT); // define input for sensor signal
}
void loop()
{
val = digitalRead(Shock); // read and assign the value of digital interface 3 to val
if(val == HIGH) // when sensor detects a signal, the LED flashes
{
digitalWrite(Led, LOW);
}
else
{
digitalWrite(Led, HIGH);
}
}