Old 09-28-2008, 11:39 PM #1
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Default Building my first red laser, need help

Ok, so after stumbling upon this great community and getting tired of my stack of dvd burners in the closet i decided to tear on open and get me a diode. I have successfully harvested it from a Samsung/Toshiba model: TS-H552 version B, my question is has anyone used this diode and what its output is.



Oh yea, i do realize i have some cleaning up to do
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Old 09-29-2008, 12:16 AM #2
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Default Re: Building my first red laser, need help

Looks like it is a 16x diode based on the specs for that drive.
I would guess its output would be similar to the Sony 16x diodes
that many use here. There is a chart somewhere here that should
give you an idea.
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Old 09-29-2008, 01:19 AM #3
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Default Re: Building my first red laser, need help

still have not been able to locate that chart after about an hour of looking, if someone could drop a link that would be great, or if you've used a 16x sony let me know where the sweet spot is i'm not looking to chop logs in half, i just want something that will burn and last for awhile, thanks in advance
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Old 09-29-2008, 01:22 AM #4
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by phrost
still have not been able to locate that chart after about an hour of looking, if someone could drop a link that would be great, or if you've used a 16x sony let me know where the sweet spot is i'm not looking to chop logs in half, i just want something that will burn and last for awhile, thanks in advance
I run my 16X's at 300mA. *That gives around 200mW after AixiZ glass lens. *You can push them harder, but it will burn stuff at 200mW. *Why stress this diode out?

Peace,
dave
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Old 09-29-2008, 02:14 AM #5
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Default Re: Building my first red laser, need help

Here's the chart.

http://www.laserpointerforums.com/fo...num=1210649510

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Old 09-29-2008, 02:17 AM #6
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Default Re: Building my first red laser, need help

thanks for the quick response daguin, so if i'm reading correctly 300mA should do the trick without stressing the diode out too much, please correct me if i'm wrong. I'm also going to buy an Aixiz 12x33 casing and was debating on buying a Lava flex driver, or making one from RS parts, any suggestions on which would be better for the life of my diode would be great once again, thanks in advanced
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Old 09-29-2008, 02:23 AM #7
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by phrost
thanks for the quick response daguin, so if i'm reading correctly 300mA should do the trick without stressing the diode out too much, please correct me if i'm wrong. I'm also going to buy an Aixiz 12x33 casing and was debating on buying a Lava flex driver, or making one from RS parts, any suggestions on which would be better for the life of my diode would be great once again, thanks in advanced

If you're looking for longevity, go with the Lavadrive. The "soft start" delay reduces stress on the diode. Make sure you are giving the diode/module significant heat sinking and don't run it until it's warm. Stop BEFORE it feels warm (NOT hot) to your hand. If you build this laser with these components and a good heat sink, you should be able to run it for over a minute before letting it cool a bit. That may not sound like much time, but believe me 60 seconds is a long time to be looking at and concentrating on a "burn."

Peace,
dave
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Old 09-29-2008, 02:30 AM #8
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Default Re: Building my first red laser, need help

great time thanks for the quick response again, that is exactly what i thought you would say but i had to ask anyway. thats what i'm going to do then, thanks again for the quick replies guys
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Old 09-29-2008, 02:36 AM #9
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by daguin

If you're looking for longevity, go with the Lavadrive. *The "soft start" delay reduces stress on the diode. *Make sure you are giving the diode/module significant heat sinking and don't run it until it's warm. *Stop BEFORE it feels warm (NOT hot) to your hand. *If you build this laser with these components and a good heat sink, you should be able to run it for over a minute before letting it cool a bit. *That may not sound like much time, but believe me 60 seconds is a long time to be looking at and concentrating on a "burn."

Peace,
dave
So the 'soft start' is a feature?

Kinda like the infamous 'It is a feature, not a bug'? I do not want to say the flexdrive is not good , but I always though that it was some kind of limitation because of the drivers architecture...
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Old 09-29-2008, 02:43 AM #10
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by ArRaY
So the 'soft start' is a feature?

Kinda like the infamous 'It is a feature, not a bug'? * I do not want to say the flexdrive is not good , but I always though that it was some kind of limitation because of the drivers architecture...
ArRaY
The "soft start" was intentionally incorporated into the design. Some call it a "ramp up." The idea is to limit the "shock" of instantaneous current.

Peace,
dave
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Old 09-29-2008, 05:26 AM #11
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by phrost
still have not been able to locate that chart after about an hour of looking, if someone could drop a link that would be great, or if you've used a 16x sony let me know where the sweet spot is i'm not looking to chop logs in half, i just want something that will burn and last for awhile, thanks in advance
250-300mA
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Old 09-29-2008, 05:56 AM #12
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by daguin
If you're looking for longevity, go with the Lavadrive. The "soft start" delay reduces stress on the diode.
As far as I know, every laser driver has a 'soft start'. Otherwise, just any constant current driver would do, wouldn't it?. For example, the DDL driver has a mandatory cap. When first turning the laser on, the cap is empty so all current will flow into the cap. It can not have two volts across it instantly, it has to charge, and it charges at a constant rate with the constant current source.
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Old 09-29-2008, 09:34 PM #13
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by daguin
[quote author=ArRaY link=1222641597/0#8 date=1222652201]
So the 'soft start' is a feature?

Kinda like the infamous 'It is a feature, not a bug'? * I do not want to say the flexdrive is not good , but I always though that it was some kind of limitation because of the drivers architecture...
ArRaY
The "soft start" was intentionally incorporated into the design. *Some call it a "ramp up." *The idea is to limit the "shock" of instantaneous current.

Peace,
dave
[/quote]

That is great... I thought that because the delay is only on the first turn on after some longer off period...
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Old 09-30-2008, 01:47 AM #14
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Default Re: Building my first red laser, need help

great info, thanks again guy's, if u can think of anything else that may help me along the way please don't be shy

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Old 10-03-2008, 02:09 AM #15
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by daguin
[quote author=ArRaY link=1222641597/0#8 date=1222652201]
So the 'soft start' is a feature?

Kinda like the infamous 'It is a feature, not a bug'? * I do not want to say the flexdrive is not good , but I always though that it was some kind of limitation because of the drivers architecture...
ArRaY
The "soft start" was intentionally incorporated into the design. *Some call it a "ramp up." *The idea is to limit the "shock" of instantaneous current.

Peace,
dave
[/quote]

Would a driver circuit achieve the soft start effect as well Dave?

Cheers

KM
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Old 10-03-2008, 02:36 AM #16
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Default Re: Building my first red laser, need help

Quote:
Originally Posted by Kirby-Morgan
Would a driver circuit achieve the soft start effect as well Dave?
Cheers
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:-? *<Ermmm> *We are talking about a driver circuit. * :-?

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