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Old 07-15-2008, 07:13 AM #1
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Default big time experiment :) MXDL 12V mod ~120mA Blu Ray

So I had a PHR803T diode that the pins had come off multiple times, it wasn't dead yet however so I decided to take it under my wing and create something of my own. so I soldered both pins back on and used silicone around it everywhere to hold the pins on better and let it dry for a few days.

I only have a few DrLava flexdrives that I need to make Dorcy Blu Ray's so I couldn't use those to power it, however I do have some extra low range adjustable rkcstr drivers that were just sitting around so I decided to use one of those.

I also have some spare MXDL flashlights that I bought a while ago from DX thinking I was going to make a lot of lasers with them but I never actually have yet, my Dorcys seem to be doing well and Dark Horse is a great supplier of heat sinks, so Dorcys are my main flashlight, meaning that these MXDL lights are just sitting there. so I had to use one of those. I am using one of the Dorcy Jr heat sinks though and fit it on the end of the MXDL by flipping the MXDL reflector inside out and cutting it up to fit in the flashlight and to have the heat sink press fit along the reflector to hold the module in place. There wasn't exactly enough room inside the head of the MXDL for the rkcstr driver to fit so I just barely screwed the head on then hot glued it on to try and keep it in place. also when you twist the head on all the wires get twisted which is bad, so this was a good alternative I have a lot of wildfire CR123 3V batteries that I ordered for the MXDL's and rigged up a blu ray to run off 2 of the CR123s... this was way too low of voltage and the laser just barely turned on, it looked pathetic... I went up to Walgreens as well as Walmart to look for 3.6V cr123 batteries but couldn't find any... I was dissapointed and posted in rkcstr's thread about it. Aparently 7.2V would have been too low for 405nm diodes anyways so I decided to use a 9V battery instead.

this is where it gets interesting. I was going to try and mod the flashlight or battery to fit the 9V inside the MXDL but this would be impossible, so I thought of attaching it to the outside and just running a wire down in. well it's quite deep in the MXDL to reach the + connection, so I just taped a wire to the - of one of the 3V cr123s and used that as a connection to the + of the MXDL. this wire runs out and I connected it to a 9V battery clamp thing that I got at an electronics store a while back. worked out great for this purpose for the negative, the whole case is ground negative on the MXDL, so I experimented with just touching the wire in certain spots on the case and the laser worked! it seemed that the threads on the end were the best spot to attach the negative to. I was going to just tape it on there but I remembered a long time ago I had bought some clicky switchs from DX that I was going to use for my minimaglites. Turns out they fit perfectly in the MXDL! the connections on the side of the clicky switch fit right on the top of the bottom of the case, and the negative wire from the 9V connector wraps around the spring near the end for a tight snug fit.

this laser is just for me so I simply used electric tape and taped the switch on the bottom, then the 9V battery around the flashlight.

this is quite possibly the strangest laser I've made. it's running on 12V (or a little less) with two different kinds of batteries, one inside the flashlight and one outside... the wrong heat sink modified to work anyways... and a beat up PHR803T diode.

pics (click for larger picture):
[link=http://www.kendallwyatt.com/pictures/DSCF0716.JPG][/link]
[link=http://www.kendallwyatt.com/pictures/DSCF0717.JPG][/link]
[link=http://www.kendallwyatt.com/pictures/DSCF0718.JPG][/link]

all in all I'm glad I made it and I'm going to keep it until it goes to the laser heaven *:
disclaimer: i would never sell anything like this and take much more care when building my Dorcy Blu Rays or any other laser I sell. this was just for fun and personal use. (every laser I make I end up selling so I wanted to have a blu ray to keep for myself!)

thanks,
Kendall


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Old 07-15-2008, 10:22 AM #2
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

Looks pretty cool with the 'powerpack' and wires coming out of it

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Old 07-15-2008, 04:55 PM #3
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

It may be the batteries that die first.......and may get hot doing it, what you have done is very similar to mixing new and used batteries, the one with the highest power will try to charge the other and as these batteries are not intended to be recharged things could go horribly wrong.... Dont leave it connected when you are not using it would be my advice.

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Old 07-15-2008, 05:47 PM #4
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

Quote:
Originally Posted by rog8811
It may be the batteries that die first.......and may get hot doing it, what you have done is very similar to mixing new and used batteries, the one with the highest power will try to charge the other and as these batteries are not intended to be recharged things could go horribly wrong.... Dont leave it connected when you are not using it would be my advice.

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hence the clicky switch

and I don't expect this to last long, it was just for fun. thanks for the tip on the battery charges.

-kendall
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Old 07-15-2008, 05:54 PM #5
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

OK, I just felt it worth mentioning, I had my health and safety officer hat on

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Old 07-15-2008, 09:33 PM #6
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu



Wow, just wow. The creativity of everyone here astounds and worries me at times. I want to see pictures of it running though!
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Old 07-15-2008, 09:36 PM #7
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

Quote:
Originally Posted by Rhith


Wow, just wow. The creativity of everyone here astounds and worries me at times. I want to see pictures of it running though! *
don't believe me that it works ??? haha

yeah I'll take a few at night when the beam looks neato
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Old 07-15-2008, 09:47 PM #8
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

Yeah your not the only one thats worried by the shear creativity of some members, I even scare myself sometimes, just yestarday I turned a plasma globe into a big shocky sparky thingy that made big sparks that could last over a minute, even shocked myself twice with it , it hurt >


Nice laser BTW, nice bit of creative DIY :P

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Old 07-15-2008, 10:13 PM #9
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

That thing. is. so. ghetto. ;D
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Old 07-17-2008, 08:15 AM #10
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

Oh yeah? THIS is custom work right here...

Here's my first 6x, before I made a driver to fit inside ;D






;D ;D ;D

DIY at it's finest
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Old 07-17-2008, 01:16 PM #11
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

Gus, is it bad that we can guess how old a picture is based on how destroyed the lens in your camera is? :
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Old 07-17-2008, 01:40 PM #12
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

nice gus. lol

9V battery packs FTW!
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Old 07-17-2008, 05:04 PM #13
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

[quote]
Aparently 7.2V would have been too low for 405nm diodes anyways so I decided to use a 9V battery instead.
[quote]

With a proper driver 7.2v should be plenty to drive a bluray. A typical transistor driver requires 1 volt drop, its just the LM317 contraptions that need more voltage difference.

I think it might still have worked from 7.2v anyways, since your average 9v alkaline battery will sag to 7 volts fairly quickly as well.
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Old 07-18-2008, 03:20 AM #14
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

[quote=Benm][quote]
Aparently 7.2V would have been too low for 405nm diodes anyways so I decided to use a 9V battery instead.
Quote:

With a proper driver 7.2v should be plenty to drive a bluray. A typical transistor driver requires 1 volt drop, its just the LM317 contraptions that need more voltage difference.

I think it might still have worked from 7.2v anyways, since your average 9v alkaline battery will sag to 7 volts fairly quickly as well.
are you saying that rkcstr's drivers aren't proper??

i was told by him that 7.5 would be adequate, hence 7.2 is not enough to be full power.

and I'm using a 9V battery in series with a 3V CR123 battery, so it's getting around 10-12V.
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Old 07-18-2008, 08:13 AM #15
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

My rkcstr driver needed a full charge (8.6v) to be able to do 190mA on my 6x. And even then it had a hard time rising to full power. Once the batteries dropped below 4 or 4.1v (around 8.1v total) it could no longer sustain that current level. So I threw the fusion drive in there and its much better with the batteries. Both are great drivers!
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Old 07-19-2008, 01:11 AM #16
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Default Re: big time experiment :) MXDL 12V mod ~120mA Blu

Hey sk8er, I let you know that mine was running at 5.15V when I pushed 150mA into the 803T, which would mean you should be able to get away with about 7.5V. *BUT, the way these (or any diode) is, higher current means higher voltage. *So, if you're pushing higher than 150mA, expect to input higher voltage as well.

Also, these diodes are highly variable, so, some may need higher voltage at the same current than others while some will require less.

And, the 6x Diodes also seem to be less efficient and I expect they will require higher voltage than the 803T diodes at the same current, but they can also be driven at a higher peak current, allowing them to put out higher peak power as well. *But, I don't have one, so I can't say for sure.

As a side note, the Fusiondrive has a 1V drop out voltage because it uses a different design, which is why it will operate at lower voltages. But, it requires some extra parts, which is partly why it's close to 3x larger in size than mine. *I'm not sure I could fit all that on my board *
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