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How Tilt Sensor works | Tilt Sensor Working | Tilt switch

This page describes Tilt Sensor basics including Tilt sensor function. It mentions Tilt sensor working along with Tilt sensor or tilt switch internal diagram.

What is Tilt Sensor?:
• Tilt sensor is an electronic device which measures degree of tilt or inclination.
• They are of two main types viz. mercury tilt sensor and ball based tilt sensor. We will see working of ball type tilt sensor.
• They are used in various applications. It is most commonly used in smart phones and digital cameras as means to adjust screen display when the device is rotated by the user.

Tilt sensor

• The figure-1 depicts breakout board along with Tilt sensor offered by Parallax Inc.
• It uses steel balls to make electrical contacts or to block IR LED.
• As shown in the figure-2, the tilt sensor contains square cavity in which rolling ball sensor is used.
• At one corner of cavity is a red LED, while two phototransistors labeled 'A' and 'B' are placed at the corners on the left and right.

Tilt sensor working | Tilt Switch Working

Tilt sensor working

Let us understand Tilt Sensor working operation.
➤The figure-2 depicts 4 directional tilt sensor or tilt switch.
➤It consists of one IR lED, two photo-transistors and a small ball which moves when the tilt sensor is rotated.
➤Tilt switch in position or Location-A: Phototransistor 1 is OFF, Phototransistor 2 is OFF as the ball blocks light emitted by LED.
➤Tilt switch in position or Location-B: Phototransistor 1 is ON, Phototransistor 2 is OFF as the ball blocks phototransistor-2.
➤Tilt switch in position or Location-C: Phototransistor 1 is ON, Phototransistor 2 is ON as the ball does not block any of the ports.
➤Tilt switch in position or Location-D: Phototransistor 1 is OFF, Phototransistor 2 is ON as the ball blocks phototransistor-1.
➤This tilt sensor can be used to determine four positions based on its rotation around one horizontal axis.


Tilt sensor related links

Tilt sensor basics and types
Tilt sensor manufacturers
Accelerometer vs tilt sensor
advantages and disadvantages of tilt sensor


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