Description: KY-020 Tilt Switch Module for AVR PIC Tilt switch module and digital 13 interface with built-in LED to build a simple circuit and make tilt indicator light. Use the LED of the digital 13 interface to connect the tilt switch sensor to the digital 3 interface. When the tilt switch sensor senses a key signal, the LED is on, and vice versa. Material: PCB Size: 24 x 15 x 7mm Specification: Routines source code: int Led = 13 ;// define LED Interface int buttonpin = 3; // define the tilt switch sensor interfaces int val ;// define numeric variables val void setup() { pinMode(Led, OUTPUT) ;// define LED as output interface pinMode(buttonpin, INPUT) ;// define the output interface tilt switch sensor } void loop () { val = digitalRead(buttonpin) ;// digital interface will be assigned a value of 3 to read val if(val == HIGH) // When the tilt sensor detects a signal when the switch, LED flashes { digitalWrite(Led, HIGH); } else { digitalWrite(Led, LOW); } } Package Includes: 1 Piece KY-020 Tilt Switch Module(8 Pack) Note: Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks !