What kind of motion sensor?


Most motion sensors detect external movements to trigger. It seems the one on this device triggers when the car moves rather than when it detects movement from outside objects.

I don't think it's a gps module. Any thoughts?

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iceng5 years ago
A piezo vibration motion sensor needs no amp feeds direct to a micro input.
rickharris5 years ago
even a simple tilt switch will detect movement - (a ball bearing in a tube - slightly inclined to keep ball at one end - at the other end is a pair of contacts that are bridged by the ball when it rolled that way.
frollard5 years ago
If it senses car motion, its a vibration sensor - mechanical or piezo accelerometer/gyro.

If it senses movement around the car - it's capacitive. It charges the car with a certain changing voltage, and uses the car as an antenna to transmit and receive crude electro-magnetic signals. When the reflections nearby change, something has moved in the vicinity of the car.
AndyGadget5 years ago
Probably a little vibration sensor.
Burf5 years ago
A pendulum, maybe something similar to those in self winding watches.