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Old 04-11-2012, 03:02 PM #1
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Default 350mW 660nm laser not burning

Hello,

I received my red laser diode 660nm 300-350mw CW Re Laser Diode DIY/Lab//TO18 5.6mm | eBay and module host Focusable Laser Module Host/5.6mm Laser Diode Case w/h Lens/DIY Laser Host/1pcs | eBay . I use this LM317 driver DIY Homemade laser diode driver with 1s LiPO=4,2V. Driver's pot is at 0 Ohms, resistor is 4,4 Ohms so the current is ~284mA. I assembled all parts, focused laser into small dot, but it doesn't light up a match. Even LD heatsink doesn't heat. What is the problem? Now I can't change the resistors, to regulate the current.

P.S. Seller said, that this diode working current is <400mA.



Last edited by z4ibas; 04-11-2012 at 03:03 PM.
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Old 04-11-2012, 03:06 PM #2
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Default Re: 350mW 660nm laser not burning

4,2v??? that is not enough for a lm317 driver you need at least 6v because the lm137 nedds 3v to work, try with 2 x lithium cells (7.4v)


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Originally Posted by z4ibas View Post
Hello,

I received my red laser diode 660nm 300-350mw CW Re Laser Diode DIY/Lab//TO18 5.6mm | eBay and module host Focusable Laser Module Host/5.6mm Laser Diode Case w/h Lens/DIY Laser Host/1pcs | eBay . I use this LM317 driver DIY Homemade laser diode driver with 1s LiPO=4,2V. Driver's pot is at 0 Ohms, resistor is 4,4 Ohms so the current is ~284mA. I assembled all parts, focused laser into small dot, but it doesn't light up a match. Even LD heatsink doesn't heat. What is the problem? Now I can't change the resistors, to regulate the current.

P.S. Seller said, that this diode working current is <400mA.

Last edited by marianin; 04-11-2012 at 03:09 PM.
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Old 04-11-2012, 03:15 PM #3
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Default Re: 350mW 660nm laser not burning

Omg, I the current was safe, I added exactly 6V, LD shined brightly, but after few secs till focused the lens, laser died. LOL. 5th laser diode...

P.S. heatsink was hot.

Last edited by z4ibas; 04-11-2012 at 03:17 PM.
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Old 04-11-2012, 03:18 PM #4
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Default Re: 350mW 660nm laser not burning

man i suggest you that build a test load and buy a driver no make experiments with lm317 drivers (if you want a real lasers burner)

P.S. i kill 4 red laser diodes

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Omg, I the current was safe, I added exactly 6V, LD shined brightly, but after few secs till focused the lens, laser died. LOL. 5th laser diode...

Last edited by marianin; 04-11-2012 at 03:19 PM.
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Old 04-11-2012, 03:19 PM #5
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Default Re: 350mW 660nm laser not burning

So what driver is the best? I tested the current, it was 250mA.
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Old 04-11-2012, 03:21 PM #6
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Default Re: 350mW 660nm laser not burning

mmmmm what about a ghostdrive??? is a great driver for red laser diodes

P.S. is a linear driver you need 2x lithium cells

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So what driver is the best? I tested the current, it was 250mA.
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Old 04-11-2012, 03:34 PM #7
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Default Re: 350mW 660nm laser not burning

I want to make a driver my self, because I have no money for buying them.
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Old 04-11-2012, 03:38 PM #8
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Default Re: 350mW 660nm laser not burning

check this driver is cheap and works with 1 lithium cell

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Old 04-11-2012, 03:51 PM #9
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Default Re: 350mW 660nm laser not burning

I want to build driver myself, not to buy. How to know, which dvd-rw has 5.6mm round laser diode, not square?
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Old 04-11-2012, 03:55 PM #10
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Default Re: 350mW 660nm laser not burning

the newer models of dvd burners have this diodes, i open a lot of old dvd burners and almost 20% have a to-18 5.6mm driver

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I want to build driver myself, not to buy. How to know, which dvd-rw has 5.6mm round laser diode, not square?
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Old 04-11-2012, 05:14 PM #11
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Default Re: 350mW 660nm laser not burning

Which are old and which are new? How to know?
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Old 04-11-2012, 05:16 PM #12
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Default Re: 350mW 660nm laser not burning

check the model that is in the back part of the burner

Edit: and Google it

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Which are old and which are new? How to know?

Last edited by marianin; 04-11-2012 at 05:16 PM.
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Old 04-11-2012, 05:22 PM #13
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Default Re: 350mW 660nm laser not burning

I know exact names of burners, but how to know which diode is in it?
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Old 04-11-2012, 05:23 PM #14
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Default Re: 350mW 660nm laser not burning

you cant know sorry

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I know exact names of burners, but how to know which diode is in it?
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Old 04-11-2012, 05:28 PM #15
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Default Re: 350mW 660nm laser not burning

Now I want to buy LPC-826 diode, it is very powerful and cheap. Can I use LM317 driver? I need a big heatsink, right? If I put LD into housing, and that housing into heatsink, it will be OK?
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Old 04-11-2012, 05:32 PM #16
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Default Re: 350mW 660nm laser not burning

yes it will be ok but you need to check your driver before you put yor LD and if you use a capacitor short their pins before conect the LD?

P.S: i suggest you that buy a driver

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Now I want to buy LPC-826 diode, it is very powerful and cheap. Can I use LM317 driver? I need a big heatsink, right? If I put LD into housing, and that housing into heatsink, it will be OK?
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