TILT SENSOR
A Tilt Sensor, also known as a Tilt Switch, detects the orientation of an object, though it doesn’t measure the angle of tilt as accelerometers do. Instead, it indicates whether the sensor is tilted or not.
A Mercury switch-based tilt sensor module outputs high when tilted, requiring a 5V DC input. It typically has three terminals: input, ground, and output. Inside, there’s a glass tube with two electrodes and a liquid mercury ball. When the sensor is tilted in a particular direction, the mercury ball moves, opening or closing the circuit.
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General Description:
A Tilt Sensor, also known as a Tilt Switch, detects the orientation of an object, though it doesn’t measure the angle of tilt as accelerometers do. Instead, it indicates whether the sensor is tilted or not.
A Mercury switch-based tilt sensor module outputs high when tilted, requiring a 5V DC input. It typically has three terminals: input, ground, and output. Inside, there’s a glass tube with two electrodes and a liquid mercury ball. When the sensor is tilted in a particular direction, the mercury ball moves, opening or closing the circuit.
Working Principle:
Tilt sensors are made up of a plastic or glass tube, with two pieces of wire and a metal ball inside:

When the tube is tilted forward, the ball rolls forward and only contacts one wire.

When the tube is tilted backward, the ball rolls back and contacts both wires.

This allows current to flow between the two wires. We can detect this high or low signal with the Arduino to determine if the sensor is tilted or not.
Specifications:
1. Tilt sensor consists of 3 pins: GND, VCC, DO (Output Signal).
2. Operating Voltage: 3.3 V to 5 V.
3. Maximum output current: 15mA.
4. Output Type: Digital.
5. Tilt Angle Threshold: Typically, around 45° (can vary depending on model).
Requirements
| S. No. | Component Name | Values |
|---|---|---|
| 1 | Resistors | 470R |
| 2 | LED | |
| 3 | Tilt Sensor |
Pin configuration:
| S. No. | Pins | Pin Description |
|---|---|---|
| 1 | S | Output Digital Pin |
| 2 | VCC | 3.3V – 5V |
| 3 | GND | Common Ground |
Applications:
1. Interactive Games and Toys.
2. Security and Alarm Systems.
3. Automation and Robotics.
4. Art installations and Displays.
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