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Old 07-07-2013, 10:02 PM #1
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Default Laser polarity

Does some1 know this laser polarity? Its not a tube shape i googled it but couldnt find
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Old 07-07-2013, 10:03 PM #2
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Default Re: Laser polarity

Picture please?
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Old 07-07-2013, 10:13 PM #3
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Default Re: Laser polarity

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Originally Posted by ARG View Post
Picture please?
sry, didnt see the upload failure
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Old 07-08-2013, 01:06 AM #4
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Default Re: Laser polarity

It looks like it is still inside the heatsink....is there any way for you to remove it? Where did you get it? Is there a model number for whatever you pulled it out of?
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Old 07-08-2013, 05:40 AM #5
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Default Re: Laser polarity

Quote:
Originally Posted by wannaburnstuff View Post
It looks like it is still inside the heatsink....is there any way for you to remove it? Where did you get it? Is there a model number for whatever you pulled it out of?
I got it from dell laptop dvd rom,well im a bit afraid to remove the heatsink because i dont want to damage the laser. Evrything rly tight, and i dont really know how to remove it
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Old 07-08-2013, 05:47 AM #6
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Default Re: Laser polarity

Can you get a picture of the aperture of the diode? It is hard to orient oneself to that picture. On photobbucket you can also label things in the edit mode so you can cirlce stuff you know what is.
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Old 07-08-2013, 10:02 AM #7
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Default Re: Laser polarity

It's a flat plastic packaged diode.

Unless you have access to epic tools and have great skills, you're not going to mount that into anything handheld.

You need to get a drive that has 5.6mm round diode in it.

Regarding the original question, no idea about the polarity since that package is symmetrical. I can tell you that the middle pin is ground. You have 50-50 chance of getting the positive connection right.
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Old 07-08-2013, 03:59 PM #8
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Default Re: Laser polarity

Quote:
Originally Posted by Eudaimonium View Post
It's a flat plastic packaged diode.

Unless you have access to epic tools and have great skills, you're not going to mount that into anything handheld.

You need to get a drive that has 5.6mm round diode in it.

Regarding the original question, no idea about the polarity since that package is symmetrical. I can tell you that the middle pin is ground. You have 50-50 chance of getting the positive connection right.
thanks. Well will it survive 1 V battery test if i miss polarity?
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Old 07-08-2013, 04:23 PM #9
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Default Re: Laser polarity

You could try testing it with a multimeter. Dont know how,, just know that you can.
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Old 07-08-2013, 04:32 PM #10
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Default Re: Laser polarity

diode test function on the mm. IIRC, the center pin is synonymous with the case pin of a hermetically sealed 5.6mm diode, and one opf the outer pins will be the other connection.

Flat Red Laser Diode Testing - 2nd Phase might be of some use to you.

1V *may* be enough to light it, but iono really.
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Old 07-08-2013, 06:32 PM #11
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Default Re: Laser polarity

I just did a quick laser build into axis housing from a Dell driver .my middle was case neg and if that pin is set sticking out more to the right than other two pins the top one should. Be the possitive pin I tested for case negative by mm and put negative lead on center. Pin and red on case then set it to continuity and you'll get bleep if it's conecter to case which I'd think it will be
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Old 07-08-2013, 06:40 PM #12
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Default Re: Laser polarity

If it is the same Dell driver sled I I got from a 2005 Dell it will be easy to extract just takes a few mins there is probs two diodes and the one with yb and number on the side of diode is the red the one with si on side is the ir diode .used solder blob methods to get the ribbon off the diode it cleans pins fantastically,then all I did was two pairs of pliers each side of diode on the alli heat sink and and little twist will open the alli just go steady and it will come out like new .of cause that is if it's the same sled and driver .
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Old 07-08-2013, 08:50 PM #13
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Default Re: Laser polarity

Quote:
Originally Posted by plakat View Post
If it is the same Dell driver sled I I got from a 2005 Dell it will be easy to extract just takes a few mins there is probs two diodes and the one with yb and number on the side of diode is the red the one with si on side is the ir diode .used solder blob methods to get the ribbon off the diode it cleans pins fantastically,then all I did was two pairs of pliers each side of diode on the alli heat sink and and little twist will open the alli just go steady and it will come out like new .of cause that is if it's the same sled and driver .
Sry, but my english is not really good, can u explain more detailed?
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Old 07-08-2013, 10:42 PM #14
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Default Re: Laser polarity

Quote:
Originally Posted by Kufain View Post
Sry, but my english is not really good, can u explain more detailed?
LOL, don't worry, it's his english that isn't good. Yours is fine.

What he's trying to say, I guess, is the method of diode extraction, which is nearly useless in our case since you have a plastic square diode instead of round metal one.

Basically, getting it out of this heatsink it's in would be a very bad idea. You have no other method of heatsinking it anyway.
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Old 07-08-2013, 11:07 PM #15
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Default Re: Laser polarity

if you extract the diode, there will be two metal tabs on the left and right sides. These are the same piece of metal that the center pin is. These are what need to be heatsinked. Since they are already heatsinked to the cast metal mini heatsink thingy, it may be easier to heatsink that squarish metal block to something rather than trying to get these tiny little tabs to make good contact with a diode hobby module like Aixiz.

If you can find a way to transfer heat reliably from those side tabs to an aixiz, the rest is easy, just like any other diode. I don't know the measurements of those plastic diodes off the top of my head, though, so I don't know if they will fit snug in a standard 5.6mm diameter aixiz. some folks make 3.6mm modules too.
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Old 07-09-2013, 03:53 PM #16
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Default Re: Laser polarity

Quote:
Originally Posted by Eudaimonium View Post
LOL, don't worry, it's his english that isn't good. Yours is fine.

What he's trying to say, I guess, is the method of diode extraction, which is nearly useless in our case since you have a plastic square diode instead of round metal one.

Basically, getting it out of this heatsink it's in would be a very bad idea. You have no other method of heatsinking it anyway.
Can you explain his 1st message? About polarity
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