Old 01-27-2009, 07:35 PM #1
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Default My BR build

Here is my new BluRay build.
The box is made from aluminimum and acts as a heatink in itself. The aixiz module has a heatsink made from washers that have heat transfer grease in between them. These washers were then squeezed together before being glued to the aixiz.
There is also a washer glued to the smaller part of the aixiz. When the two halfs of the aixiz are screwed together, the washers press against the inside and outside of the metal box. The washers also press against the top and bottom of the box, with more heat transfer grease to aid the contact.
Basically the heatsink transfers heat to the box which aids more to the cooling of the diode.

I am running the diode at about 220mA (with a fresh 9v battery) giving about 135mW of power. Even with a new battery I can run the diode for about an hour before it gets too warm.

Topped off with a miniture key switch for security, I think it makes a neat little housing.

I'm going to do the same for my 250-300mW red burner next.
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Old 01-27-2009, 07:36 PM #2
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Default Re: My BR build

pic 2....
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Old 01-27-2009, 07:37 PM #3
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Default Re: My BR build

pic 3....
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Old 01-27-2009, 07:38 PM #4
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Default Re: My BR build

and last of all, a quick beam shot pic of all 4 of my lasers.
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Old 01-27-2009, 08:03 PM #5
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Default Re: My BR build

nice... how are you keeping the 9V still... or does it shake around

looks like my 1st build from the other day



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Old 01-27-2009, 08:14 PM #6
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Default Re: My BR build

nice build! what type of ld/driver did you use?
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Old 01-27-2009, 08:20 PM #7
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Default Re: My BR build

i would guess he used a rkcstr...

i made a DDL... with 8 AAs
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Old 01-27-2009, 08:26 PM #8
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Default Re: My BR build

Quote:
Originally Posted by bugattidude
nice... how are you keeping the 9V still... or does it shake around
Well the height of the battery. laying on it's side, is about 2mm less than the height of the box, so with a small bit of bluetac under the battery, it fits tightly when the lid is screwed on.
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Old 01-27-2009, 08:32 PM #9
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Default Re: My BR build

Quote:
Originally Posted by bugattidude
i would guess he used a rkcstr...

i made a DDL... with 8 AAs
Yep it's a full range rkcstr driver running a phr803t diode.
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Old 01-27-2009, 10:01 PM #10
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Default Re: My BR build

i feel pethedic now... since i used a DDL driver i made... the diode blew at around 120mA... cant figure out whats wrong... so i get to rebuild
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Old 01-27-2009, 10:23 PM #11
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Default Re: My BR build

Quote:
Originally Posted by bugattidude
i feel pethedic now... since i used a DDL driver i made... the diode blew at around 120mA... cant figure out whats wrong... so i get to rebuild *
Well either I just happen to have a very good quality diode that can handle 220mA (although after a few days of use and the battery drains a bit, the current drops to about 170mA) or the heatsink I made is doing a good job.

However I have now appreciated the benefits of a good heatsink. Using washers as a heatsink is good but I do recommend the use of the heat transfer grease between each washer. It helps to fill in any small gaps between the washers. In a way it makes the washers act as though it is one solid peice of metal.
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Old 01-28-2009, 01:41 AM #12
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Default Re: My BR build

Quote:
Originally Posted by mike666
[quote author=bugattidude link=1233088539/0#9 date=1233097290]i feel pethedic now... since i used a DDL driver i made... the diode blew at around 120mA... cant figure out whats wrong... so i get to rebuild *
Well either I just happen to have a very good quality diode that can handle 220mA (although after a few days of use and the battery drains a bit, the current drops to about 170mA) or the heatsink I made is doing a good job.

However I have now appreciated the benefits of a good heatsink. Using washers as a heatsink is good but I do recommend the use of the heat transfer grease between each washer. It helps to fill in any small gaps between the washers. In a way it makes the washers act as though it is one solid peice of metal.[/quote]


yea,... need to get some of that...

but i finally fixxed my blu ray... i used my only other diode for something else to replace it... its set around 120mA again.... thats crazt how yours is taking 220mA... guessing the beam is really visible even without smoke
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Old 01-28-2009, 01:45 AM #13
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Default Re: My BR build

Looking good! Although steel is a very poor thermal conductor. I'm
sure upgrading the heatsink from those washers will make it run cooler longer.
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Old 01-28-2009, 02:04 AM #14
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Default Re: My BR build

I like this laser! Very clean looking inside and out. A great addition to your collection. Quite the diode, too ! Not too many of these survive for long at, or even reach 220mA.
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Old 01-28-2009, 11:17 AM #15
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Default Re: My BR build

Quote:
Originally Posted by bugattidude
yea,... need to get some of that...

but i finally fixxed my blu ray... i used my only other diode for something else to replace it... its set around 120mA again.... *thats crazt how yours is taking 220mA... guessing the beam is really visible even without smoke
Well I was going to take a pic of the setup with my DMM attached to show the current but couldn't be bothered *lol.

But if anyone needs to see it I would lol.
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Old 01-28-2009, 11:22 AM #16
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Default Re: My BR build

Quote:
Originally Posted by Balisong
Looking good! Although steel is a very poor thermal conductor. I'm
sure upgrading the heatsink from those washers will make it run cooler longer.
Yes I agree. I did look for aluminimum washers but couldn't fnd any. However I rarely have the laser running for more than about 30 minutes so steel washers will do the job nicely.
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