osoyoo : "SW-520D Tilt Switch Sensor Module"
より：
- Inside the can is a ball that make contact with the pins when the case is upright.
Tilt the case over and the balls don’t touch, thus not making a connection.
- This module will output logic LOW when the sensor is tilted below the threshold angle; logic HIGH when it is tilted above the threshold angle.
The threshold angle ranges from 45 degree to 130 degree.
- Aside from threshold angle, angular velocity also affect the tilt module. It can also be used as a vibration sensor!
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