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Hello I've got this Component with an arduino pack and I want to know what it is.

enter image description here

It only has one label on it "HDX" I googled it but didn't find any thing it has also one short golden leg and a normal leg I can hear something inside it moving if i tilt or shake the component

Can anyone please tell me what is that component and how it works?

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    \$\begingroup\$ I would say its wood. Plywood maybe? Not sure from the angle, you can hardly see the side. Looks dirty and not well lit, might be birch \$\endgroup\$ – PlasmaHH May 4 '16 at 13:18
  • \$\begingroup\$ Thanks for your effort captain @PlasmaHH you're so funny :) \$\endgroup\$ – Th3Wolf May 4 '16 at 13:21
  • \$\begingroup\$ Why does this have 2 down votes? Its good question in my opinion. \$\endgroup\$ – wav scientist Jul 19 '18 at 17:11
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It's a vibration switch according to this article here.

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It is a Vibration switch. Below image shows the internal construction.

enter image description here

Shaking it should break the connection between the ends momentarily.

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Your comment that you can "can hear something inside it moving if i tilt or shake" it indicates that it is probably a rolling-ball tilt/movement sensor.

If you wire it into a circuit with an LED, or even just attach it to a continuity tester you should find that such movement makes/breaks the circuit.

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  • \$\begingroup\$ Thanks you Chris I just realized that it is a vibration switch. \$\endgroup\$ – Th3Wolf May 4 '16 at 13:17

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