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Old 01-25-2008, 08:51 PM #497
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Default Re: Red DIY DVD laser burner.

Quote:
Originally Posted by Dark_Horse
Gazoo, If I used an open-can LD, like from the DVR115, in place of the GB LD, would I be OK with the 350ma that my Dorcy is putting out without resistors, then I would just need to add a capicitor to the LD, and I should have a reliable-long-lived that can burn like the GB LD, maybe a little better?
BTW, Where do I buy the Merideth module, I would like a little better optics?
Thank you all,
Dark Horse
I think you would be fine with an open can running directly off of the circuit. Maybe Kenom can confirm this but I don't think a capacitor is necessary because the Dorcy circuit already has one on there.

The meredith modules do have some drawbacks. Sometimes when turning the focusing ring the diode turns with it. Jay noticed that the adapter was a bit too long in one he received so he had to trim the adapter down so it would focus for distance. The the lenses are better than the aixiz, whether or not you get a glass or acrylic lens. The acrylic seems to burn a bit better especially when lighting matches at a distance, however the glass lens lets more light through so the output is increases, but the beam diameter is larger. As with the aixiz, there is some wiggle in the threads. It would be nice to find modules that don't have this problem. By making finer threads the problem would be solved. Anyway, here is the link:

http://www.mi-lasers.com/cgi-bin/sho...s=diode_optics

If you order one make sure to get the 5.6mm to 9mm adapter.


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Old 01-25-2008, 11:48 PM #498
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Default Re: Red DIY DVD laser burner.

I'm running an open can straight off of the Dorcy circuit @~320mA w/o any problems. It works great! I have been using it for about a month with many runs > 1 minute.
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Old 01-26-2008, 12:42 AM #499
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Default Re: Red DIY DVD laser burner.

I'm running an open can too using the Dorcy circuits for over 3 months now. [smiley=wink.gif] Using Panasonic Lithium Primary I can get 340mA, run time ~2 minutes.
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Old 01-26-2008, 03:17 PM #500
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Default Re: Red DIY DVD laser burner.

Kenom,
Thanks for reposting the picture of the circuit, I am not very familiar with Suface-mount componets, can you verify that one is a capicitor, and so I do not need to add one?
Thank you to everyone else confirming that an open-can can run directly from the stock circuit, looks like I will be doing some experiment with diferent LD's , hopefully I will get to try the "Phasor LD" next, if the GB goes through
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Old 01-26-2008, 03:41 PM #501
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Default Re: Red DIY DVD laser burner.

yeah it has 2 capacitors on it.
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Old 01-26-2008, 04:00 PM #502
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Default Re: Red DIY DVD laser burner.

Quote:
Originally Posted by Dark_Horse
Kenom,
Thanks for reposting the picture of the circuit, I am not very familiar with Suface-mount componets, can you verify that one is a capicitor, and so I do not need to add one?
Quote:
Originally Posted by Kenom
yeah it has 2 capacitors on it.
Yes, but are they across the laser diode? They don't look like high-value capacitors from the photo...
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Old 02-09-2008, 05:35 AM #503
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Default Re: Red DIY DVD laser burner.

How do you know what pins are pos & neg on the diode??
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Old 02-09-2008, 10:37 AM #504
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Default Re: Red DIY DVD laser burner.

Quote:
Originally Posted by tone1132
How do you know what pins are pos & neg on the diode??
There is a sticky posted at the fop of this section of the forum called Group Buy Diode Pin-outs !
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Old 02-09-2008, 03:24 PM #505
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Default Re: Red DIY DVD laser burner.

hey kenom how hard is it to get the driver out of the dorcy? i was thinking to rreplace the surface mount resistor with a higher rating resistor so no need for it on the diode
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Old 02-09-2008, 06:05 PM #506
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Default Re: Red DIY DVD laser burner.

it's pretty easy to remvoe. Just push another battery in there as well as the existing one and keep applying steady soft pressure.
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Old 02-09-2008, 08:03 PM #507
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Default Re: Red DIY DVD laser burner.

thanks ill let you know how this turns out
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Old 02-09-2008, 09:43 PM #508
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Default Re: Red DIY DVD laser burner.

Well I finished my GB laser. I put in Kenom's favorite: a Dorcy.

See it in action here (my stupid hand blocks the first balloon pop):
http://video.google.com/videoplay?do...67378078113524
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Old 02-10-2008, 03:15 PM #509
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Default Re: Red DIY DVD laser burner.

hey,

I am thinking about starting one of these projects soon, as I have a spare 50 dollars(or whatever will be left after buying a CR123 battery for my Galileo). I have wire and a switch and a capacitor (47uF 10V I think, is that large enough?). I also have an AixiZ module to put a diode into. the only thing (I think) I need would be a power source, maybe a pot (what rating?), a resistor, and the actual diode itself!

I can figure out or look up what resistor size to use, but what about all those other components. Is my capacitor large enough? What pot would I need, and what kind of power source would I want? also, is an AixiZ module enough to heatsink it? and I won't be over driving this diode, only keeping it at a constant 150 or 200 mW.
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Old 02-12-2008, 04:32 AM #510
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Default Re: Red DIY DVD laser burner.

did you cut the bottom off the laser housing? and is there any resistors or anything protecting the diode?? im pretty new here, thanx
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Old 02-13-2008, 06:12 AM #511
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Default Re: Red DIY DVD laser burner.

well i watched the video. i electricly isolated the cooections, i cut into the aluminum, is that ok? i had a good connection when i soldered it and put it together it was completely dim and got pretty warm. whats the deal??
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Old 02-13-2008, 01:39 PM #512
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Default Re: Red DIY DVD laser burner.

if it was dim then you've fried the diode. it's possible that you killed it by esd or shorting the pins together. I'm putting together a more complete walkthrough video.
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