r/AskElectronics 23h ago

I need help identifying components on this board.

Wondering if this board has an accelerometer. I know nothing about this and this is why I’m asking. Also what is the gold cylinder? Any help is greatly appreciated.

0 Upvotes

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2

u/nixiebunny 23h ago

The gold cylinder labeled SW1 is probably a motion sensing switch. You could verify that with an ohmmeter by shaking it after connecting the test leads to it. The other parts are quite generic. 

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u/cajunfire19 23h ago

So I know what it does and where I bought it. My knowledge stops there. It’s a product sold to make a brake light blink when a motorcycle decelerates blduring engine braking to warn traffic behind you that you are decelerating without using actual brakes. Box claims there is an accelerometer. When the board tips I’m assuming the gold cylinder triggers the relay to the light it’s attached to. But what is happening is that the vibration from said motorcycle triggers the light blinking when throttle is opened. Rendering this thing totally useless.

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u/snappla 21h ago

It's sounds like it's working but you need to adjust the sensitivity. It's too sensitive rn. I bet adjusting the trim pot will solve your issue.

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u/Miserable-Win-6402 Analog electronics 19h ago

Yes, but you can also try to vary the orientation of the gold cylinder, it might change the behaviour

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u/snappla 21h ago

Option 1: You need to adjust the trim pot to reduce the sensitivity. Use a screwdriver to turn the little grey cross on the blue box.

Option 2: the screw terminals are askew. There's a good chance there's an intermittent contact made with engine idle vibration. Check the screw terminals are okay first.

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u/cajunfire19 23h ago

Awesome. Thanks.

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u/paullbart 23h ago

The gold cylinder is a tilt switch. It will either contain a ball bearing or some mercury that will close the contacts in the upright position.