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To Lase, or to burn (dvd's) that is the question

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dynamicvelocity

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I just bought an 18 speed Samsung DVD burner for $39 AUD and would like to take it apart and play with the laser, but i'm thinking if it's going to be an Open Can diode, it might just leave it as a dvd burner and retain it's original functionality.

problem is, i don't know if it's open can before i void the warranty finding out!

does anyone else know about samsung 18x burners? (the sticker says Class I and Class IIIB laser radiation) - i presume that means 2 diodes.)

http://agcomputers.com.au/product_info.php?cPath=68&products_id=476
 





o_DEATH_ANG3L_o

o_DEATH_ANG3L_o

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Re: To Lase, or to burn (dvd's) that is the questi

dynamicvelocity we really can't tell you to not harvest or to harvest your diode. Larry that model that Kenom had is different than the one dynamicvelocity's link pointed at. They are both Samsung, yes. Probability of an open can diode, more than likely. Anything above 16x is most likely going to be an open can.
 
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marianne

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Re: To Lase, or to burn (dvd's) that is the questi

you could always buy a diode from senkat for...what were they? $13? intended for a dvd burner but new and unused, so no needing to fiddle to get one out of the burner :)
 
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Rhith

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Re: To Lase, or to burn (dvd's) that is the questi

Well you will get something out of it for sure. I'm guess that the two different classes corrispond to the Red "burning" diode and the IR diode for CD reading. Be sure to keep us informed of your intentions.
 
o_DEATH_ANG3L_o

o_DEATH_ANG3L_o

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Re: To Lase, or to burn (dvd's) that is the questi

marianne said:
you could always buy a diode from senkat for...what were they? $13? intended for a dvd burner but new and unused, so no needing to fiddle to get one out of the burner :)
Click to expand...

I believe the used to be $13.00 but now they are $17.50 which is still an amazing good price.
 
Kenom

Kenom

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Re: To Lase, or to burn (dvd's) that is the questi

Death Angel said:
dynamicvelocity we really can't tell you to not harvest or to harvest your diode. Larry that model that Kenom had is different than the one dynamicvelocity's link pointed at. They are both Samsung, yes. Probability of an open can diode, more than likely. Anything above 16x is most likely going to be an open can.
Click to expand...

Actually angel those burners I got were 16x.  it's a pretty poor assumption that anything above a certain speed is going to be an open can diode or whatnot.  I've harvested all kinds of 16x burners and the majority of them have NOT been open can.  It's not until you get into the 18x and 20x (mostly 20x) that you start seeing open can diodes as the norm.  but just because it's the norm does not mean your going to get an open can diode.  I have made the mistake too many times of assuming something and BAM! I'm out money or stand around lookin like an idiot.

Now i'm not tryin to step on any toes here.  I'm just trying to pass on my wisdom of having stood around too many times looking like an idiot after having made assumptions.  13 dvd-rw I purchased.  Of them I got 2 usable diodes.  all of them 16x or above.  STick with senkat GB diodes or buy a quality name burner. (sony, Liteon, Plextor, philips, panasonic, pioneer, asus)
 
Gazoo

Gazoo

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Re: To Lase, or to burn (dvd's) that is the questi

Yeah, I agree. I still think the Pioneer 112D is the easiest out of all of them for harvesting an open can. Someone said they are on sale at NewEgg for $30.00 including shipping. But I am going to wait to see how the phasor diodes pan out, and I still have a 112D ready for harvesting. I need to know how much current it will take to get the phasor diode to put out its pulsed power rating of 350mw's.
 
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dynamicvelocity

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Re: To Lase, or to burn (dvd's) that is the questi

i think i have a Pioneer 112D in my computer at present - the samsung was just 'cheap'
should i swap them and harvest the pioneer - putting the samsung to work in the computer? (seems like a safer route to me?)
 
Kenom

Kenom

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Re: To Lase, or to burn (dvd's) that is the questi

that is what I'd do. However if you have never had experience harvesting a laser diode before you may wanna hold off until you have a bit more experience. The open can diodes are a lot more sensative to esd and just a lot more finicky to get going. I've torn apart probably 2 dozen drives, found 4 open can diodes and not suceeded in getting one diode to work that was open can. so think it through a bit.
 
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dynamicvelocity

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Re: To Lase, or to burn (dvd's) that is the questi

maybe it doesn't count - but i've practiced by taking apart a few CD drives - the 2 so far have been pretty different designs - usually glue is holding the lens elements, and screws into the other bits - i have an antistatic wrist strap and have experience at dissembling repairing and reassembling Laptops... - though that's not really similar to SMD or LD work.

a question to those of you who've done this to 'dozens of cd burners' - what is it you do with the diodes? i personally only have 2 hands and a desk so - at once, i could only be 'using' 3 lasers... - do you sell the rest?
 
Gazoo

Gazoo

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Re: To Lase, or to burn (dvd's) that is the questi

You should not have any trouble harvesting the diode from the 112. In fact I did not even need to remove the assembly to get the diode out. But removing the diode from the heatsink is another matter. You might be able to press it out with a pair of pliers, but I think it is best to cut away at the heatsink until the diode is free. The brass that forms around the open part of the diode is a bit on the soft side and bends easily. Be careful to not touch or get anything in the diode.
 
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dynamicvelocity

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Re: To Lase, or to burn (dvd's) that is the questi

thanks :) *inspired with confidence*

i think i'll be able to make my own power supply, and i have a gas solderring iron, so no wires (or potential ESD) from there (hopefully) - i guess i should connect my Antistatic wrist strap to the chassis of the diode before 'dismount' ?

then get myself one of the much discussed axis modules... (Does DX stock them?)
 
Gazoo

Gazoo

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Re: To Lase, or to burn (dvd's) that is the questi

Anything you can do to prevent ESD is a good thing. During the summer I was not concerned with ESD as the humidity was high even with the AC on. But now it is getting cooler and the humidity is dropping so I need to be more careful.. :p

DX stocks housings similar to the Aixiz and you will see other sellers on e-bay offering them too. I noticed a seller or two from China selling them on e-bay.
 
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BlueFusion

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Re: To Lase, or to burn (dvd's) that is the questi

Don't just clip your antistatic strap to the diode! That is worse than useless as you are not grounded, and it is simply more likely to fry the diode when you attach it!
You need to clip the strap to something grounded, like a PC case when it's plugged in. Be sure to get bare metal. Also if you have an amplifier or something that you are thinking of grounding yourself on, it is probably double insulated not grounded. check the plug, needs to be 3 pin not 2.

Overall you need to connect the strap to something that is directly grounded, and has a 3 pin plug.
 
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yes8s

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Re: To Lase, or to burn (dvd's) that is the questi

BlueFusion said:
Don't just clip your antistatic strap to the diode! That is worse than useless as you are not grounded, and it is simply more likely to fry the diode when you attach it!
You need to clip the strap to something grounded, like a PC case when it's plugged in. Be sure to get bare metal. Also if you have an amplifier or something that you are thinking of grounding yourself on, it is probably double insulated not grounded. check the plug, needs to be 3 pin not 2.

Overall you need to connect the strap to something that is directly grounded, and has a 3 pin plug.
Click to expand...

Well said :)
 
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