Old 11-09-2015, 08:14 AM #1
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Smile Who can help me check what's this?

Somebody tell me it's the laser pointer pen parts , but I wonder which concrete part is this ?
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Old 11-09-2015, 02:35 PM #2
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Default Re: Who can help me check what's this?

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Originally Posted by Evans View Post
Somebody tell me it's the laser pointer pen parts , but I wonder which concrete part is this ?
Concrete part? You mean the damaged part with the copper wire showing? That's an inductor. Couldn't tell you the value though.
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Old 11-10-2015, 02:04 AM #3
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Default Re: Who can help me check what's this?

Yep, gold star for diachi

https://www.google.com/search?q=indu...ih=856&dpr=0.9
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Old 11-10-2015, 02:19 PM #4
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Default Re: Who can help me check what's this?

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Why thank you! lol
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Old 11-10-2015, 04:07 PM #5
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Default Re: Who can help me check what's this?

And a + Rep for helping a new member
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Old 11-10-2015, 04:28 PM #6
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Default Re: Who can help me check what's this?

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And a + Rep for helping a new member

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Old 11-14-2015, 01:28 AM #7
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Default Re: Who can help me check what's this?

Ok, thanks , I can confirm it's inductor now. But is this in the switch?
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Old 12-04-2015, 07:14 PM #8
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Default Re: Who can help me check what's this?

I do not beleive that's an inductor, but a power output choke.
I found a nearly identical one here: ACM4520V-231-2P-T00 TDK Corporation | Filters | DigiKey
And yes it is in the switching regulator, if that's what you mean
I would think that it's an inductor to regulate the driver, but the component to do that labelled l3 on the left. A choke would make much more sense so that you don't push 50 volts through the diodewhen the power is cut
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Old 12-04-2015, 07:44 PM #9
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Default Re: Who can help me check what's this?

Yes the broken part with the copper windings showing is an inductor, if you look at the spring at the base it looks like a driver, the little squares to the sides of the spring are a good clue, I have seen these before.

This looks like a boost driver for a laser pointer/pen that's made narrow with the battery spring on the board.

The squares give it away.


Here is one like yours out of a pen size pointer, the inductor is near the input spring.


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Old 12-04-2015, 07:44 PM #10
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Default Re: Who can help me check what's this?

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Originally Posted by tuskiomi View Post
I do not beleive that's an inductor, but a power output choke.
I found a nearly identical one here: ACM4520V-231-2P-T00 TDK Corporation | Filters | DigiKey
And yes it is in the switching regulator, if that's what you mean
I would think that it's an inductor to regulate the driver, but the component to do that labelled l3 on the left. A choke would make much more sense so that you don't push 50 volts through the diodewhen the power is cut
Those don't look like the same components to me but may serve the same purpose. If we're going to be picky a choke is technically an inductor...

You could be right though - seeing as there *is* another inductor there - it would make sense for the second one to be a choke to filter out any noise or what have you.
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Old 12-04-2015, 07:48 PM #11
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Default Re: Who can help me check what's this?

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Originally Posted by diachi View Post
Those don't look like the same components to me but may serve the same purpose. If we're going to be picky a choke is technically an inductor...

You could be right though - seeing as there *is* another inductor there - it would make sense for the second one to be a choke to filter out any noise or what have you.
This is true. Power chokes usually have larger wire, more resistance and a ferite core. That's what made me guess that this was a choke.
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Old 12-04-2015, 08:32 PM #12
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Default Re: Who can help me check what's this?

I could be wrong, but it's a very classic looking layout, likely from a pointer pen.

It's all good my friends
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Old 12-04-2015, 10:26 PM #13
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Default Re: Who can help me check what's this?

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I could be wrong, but it's a very classic looking layout, likely from a pointer pen.

It's all good my friends
nice!
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