What They Usually Are
These tiny components are often found inside:
Toys
Simple alarms
LED gadgets
Motion detectors
DIY electronics projects
The metal balls move when the tube is tilted or shaken, completing or breaking an electrical circuit.
Inside the sealed glass tube:
The tiny ball bearings roll with movement or gravity
When they touch metal contacts, electricity can flow
Tilting the device changes the connection state
This makes them useful for:
Detecting motion
Orientation sensing
Simple on/off activation
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