Lesson 21 Tilt SwitchΒΆ



The tilt switch sensor module is a ball tilt switch with a metal ball inside. It is used to detect inclinations of a small angle.


  • 1 * SunFounder Uno board

  • 1 * USB data cable

  • 1 * Tilt switch module

  • 1 * 3-Pin anti-reverse cable


The principle is very simple. When the switch is tilted in a certain angle, the ball inside rolls down and touches the two contacts connected to the pins outside, thus triggering circuits. Otherwise the ball will stay away from the contacts, thus breaking the circuits.

In this experiment, we use a tilt switch module and an LED that has been attached to pin 13 of the SunFounder board to build a simple circuit.

With the LED attached to pin 13, connect pin SIG to digital pin 7 of the SunFounder Uno board. Then the tilt switch outputs low signals and the LED will be on. Otherwise it will be off.


Experimental Procedures

Step 1: Build the circuit


Step 2: Open the code file

Step 3: Select correct Board and Port

Step 4: Upload the sketch to the SunFounder Uno board


Now, tilt the switch and the LED attached to pin 13 on SunFounder Uno board will light up.