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KY-017 水銀開關 Mercury Tilt Switch Module

KY-017 水銀開關 Mercury Tilt Switch Module

Regular price HK$15.00
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Arduino KY-017 mercury tilt switch module, it uses a small mercury ball that completes the circuit when you tilt the module.

  • Arduino KY-017 mercury switch module

  • KY-017 Fritzing part image


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 Voltage 3.3V 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-017 Arduino
S Pin 3
middle +5V

KY-017 Arduino connection diagram

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);
		digitalWrite(led_pin, LOW);