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Old 08-22-2007, 09:48 AM #65
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

Quote:
Well, the Aixiz module is more of a universal housing, and it works perfect for what we use it for ! *

G !

So the lens of the Aixiz is good enough to focus the beam? and if i want to use the full potential of the 250mw i power it with 2x 1,5 volts battery right?
All i need to know * Thnx Senkat! you're the man!


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Old 08-22-2007, 09:54 AM #66
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

don't just hook it straight up to a battery though, you have to build a driver circuit if you want you diode to work, or last a while!
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Old 08-22-2007, 10:02 AM #67
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

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Originally Posted by Knasterpijp
Quote:
Well, the Aixiz module is more of a universal housing, and it works perfect for what we use it for ! *

G !

So the lens of the Aixiz is good enough to focus the beam? and if i want to use the full potential of the 250mw i power it with 2x 1,5 volts battery right?
All i need to know * Thnx Senkat! you're the man!
YES - definitely make a circuit though - otherwise they will be VERY bright for a moment, and then that is it ! I know that sucks, I have done it before ! Make sure you adjust your circuit for whatever type of batts you shoose to use !

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Old 08-22-2007, 10:33 AM #68
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

If you don't feel like building a circuit and just want a quick testfire, i'd suggest at least using a resistor to limit the current. On 2 AA's, something like 10 ohms should be okay, limiting current to 100 mA at 2V diode voltage, and results in 50 mA at 2.5V so you can be pretty sure it'll be above the lasing threshold.

I wouldnt recommend that for any sort of permanent setup, but its a lot less likely to fry your diode than just hooking up 2AA's (like in a minimag) and praying
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Old 08-22-2007, 11:06 AM #69
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

: hmmm this part is new to me, if those diodes run on 3volts, then what's the problem.
that guy kipkay does hook it up directly to two 1,5volts battery' s. :-?
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Old 08-22-2007, 11:10 AM #70
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

well the batteries simply supply too much current! these diodes require about 300ma to be high powered, but the batteries can supply over 2 amps at times!! so if you build a driver circuit, it will still provide 3 volts, but at a current around 300ma.
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Old 08-22-2007, 11:13 AM #71
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

Knasterpijp, as many of us here will tell you, direct drive is bad, bad, bad. That video was a bunch of very horrible advice. Powering a diode directly through 2 AA batteries is simply a death wish. What I would suggest is to at least use a resistor, like Benm suggested, or build a drive circuit. There are many guides available here. You just have to go and read up about it all.

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Old 08-22-2007, 12:09 PM #72
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

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so if you build a driver circuit, it will still provide 3 volts, but at a current around 300ma.
Strictly speaking, a current driver will deliver whatever voltage required to maintain a current of 300 mA.

The 'problem' with laser diodes (and LEDs for that matter) is that their current-vs-voltage curve is very steep in the operating area. This means a very slight increase in voltage can cause a big increase in current. A laser diode could, for example, be fine at 2.6 volts, but badly overdriven at 2.7V. A series resistor remedies this to some extent, as it makes the curve of the overall system less steep.

Batteries provide a certain voltage, with current only limited by internal resistance. Both vary among batteries, discharge level and due to things like temperature. This can in some cases work out fine, but that IS a matter of luck, not design or science.

Building an acceptable current source is not that hard to do. It will require a bit of soldering, but i think it should by no means be more difficult than, for example, fitting a diode into a case with a lens and all.
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Old 08-22-2007, 03:17 PM #73
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

whats the lastest tally? I know my order is not on the list
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Old 08-22-2007, 03:19 PM #74
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

so can I just slap it in a Dorcy without building another circuit?
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Old 08-22-2007, 04:59 PM #75
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

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whats the lastest tally? I know my order is not on the list

Yes, I stopped updating the list, since with Google Checkout, it does not leave a space for you to put your forum name - and I kinda did not want to be posting everyone's real names on her - I do not mind that everyone knows MY name, but you can never tell if someone would be offended by posting their names and such Rest assured that your orders HAVE been processed, and the diodes ar ordered, so everyhting is going perfectly well at the moment !

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Old 08-22-2007, 05:23 PM #76
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

When do you envision these shipping, SenKat? Also, do you happen to have any Aixiz modules to spare? The only place I see them is on eBay for a 10-pack. I just want to get one to see if I have the skills to build one of these things myself. If I'm successful, I may pick up a 10 pack and get started, but for now, 1 will do.
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Old 08-22-2007, 05:32 PM #77
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

You don't have to buy the 10 pack. You buy one with the diode already mounted in it, and replace it with the GB diode.

Many of you are asking questions that have been answered dozens of times. Please read through the Experiments and Modification section of this forum, and if you have a question not related to this thread, ask it in that thread.
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Old 08-22-2007, 06:44 PM #78
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

[/quote]

Quote:
Originally Posted by Daedal
Knasterpijp, as many of us here will tell you, direct drive is bad, bad, bad. That video was a bunch of very horrible advice. Powering a diode directly through 2 AA batteries is simply a death wish. What I would suggest is to at least use a resistor, like Benm suggested, or build a drive circuit. There are many guides available here. You just have to go and read up about it all.

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Hey Daedal,

I've red your guide. (the forum did not allow me to paste the URL) *>
You said i need at least a resistor (4 /5 OHM) right? But where are the LM317 TO-39 or TO-220 package for then? is to endurance the LD lifetime?
I use 2x 1,5 volts batteries. You use *2x 3volts batteries. Do i need different parts now?

I am confused about which parts i must buy to match the 3volts PSU and to get the best out of the LD.
please enlight me Daedal! ;D


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Old 08-22-2007, 11:35 PM #79
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

I'm in for two!
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Old 08-22-2007, 11:55 PM #80
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Default Re: Group Buy # 3 For Sony 16X DVD Burner Didoes

so I have the axiz, ordered this diode. I have a minimag laying around but I REALLY dont feel like building a reg circuit. Can I pick up a Dorcy and put it in one of those and use that regulated circuit? If so what model?
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