KY-017 Mercury Tilt Switch Module

Description

Arduino KY-017 mercury tilt switch module, it uses a small mercury ball that completes the circuit when you tilt the module. 

Specifications

This module consists of a mercury switch, a 680Ω resistor and a LED that will light up when tilt is detected. The mercury ball will open/close the circuit when the module is rotated.

Operating Voltage3.3V to 5.5V

KY-017 Connection Diagram

Connect the Power line (middle) and ground (-) to +5 and GND respectively. Connect signal (S) to pin 3 on the Arduino.

KY-017Arduino
SPin 3
middle+5V
-GND
KY-017 Arduino connection diagramclick to enlarge

KY-017 Example code

The following sketch will light up the led on pin 13 of the Arduino when the module is tilted.

int led_pin = 13; // Define the LED interface
int switch_pin = 3; // Definition of mercury tilt switch sensor interface
int val; // Defines a numeric variable

void setup()
{
	pinMode(led_pin, OUTPUT);
	pinMode(switch_pin, INPUT);
}

void loop()
{
	val = digitalRead(switch_pin); // check mercury switch state
	if(val == HIGH)
	{
		digitalWrite(led_pin, HIGH);
	}
	else
	{
		digitalWrite(led_pin, LOW);
	}
}

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