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Old 05-05-2011, 12:57 PM #1
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Default Questionable Rayfoss drivers.

Hey guys.

Jeffreythe00 here sent me a red laser he had to repair, because it went dead just like that.

Now, it was a Rayfoss reddie laser powered by single 16340 battery.

This, I believe:
www.rayfoss.com

Now, problem.
First, taking it apart is a pain. It has a small brass piece which holds the diode, and it's pressfited and firmly glued into place, inside the host.

I had to machine it out, cannot hammer the brass piece out. Tried.

Made new direct pressfit heatsink for it,

But here's the problem.

Just today I got to cut open the heatshrink tubing around the driver(?):



Back side? What back side?


Not even an output capacitor, guys. Not even that.

Will see what can I do with the driver, possibly re-use it somehow. Add cap, possibly input diode to drop input voltage when powered by 16340 instead of intended CR123 presumably ...

Anyhow. Don't buy this.


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Old 05-05-2011, 04:35 PM #2
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Default Re: Questionable Rayfoss drivers.

I've driven a red off of a single chip driver before. That one, I don't recognize, but also it has a few resistors too. Not defending it, because my LOC setup died within 6 months, but that could have been anything, this was definitely not meant to be assembled this way for so long, more of a proof of concept that I never got around to disassembling. Setup had magnets as battery connections, and the chip was "floating" between the anode and cathode wires inside the aixiz module.
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Old 05-05-2011, 04:41 PM #3
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Default Re: Questionable Rayfoss drivers.

Yeah but... this!

Man, look at the soldering on the components, it's hand made. And exeptionally shitty.

Board terribly designed, as if some retarded software auto-routed it.

I'm trying to get it to work still. So far it's like open circuit. Perhaps driver itself died, dunno. Diode was dead either way.
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Old 05-05-2011, 08:32 PM #4
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Default Re: Questionable Rayfoss drivers.

Well, working reliably as far as I can tell.

Here's a picture:
http://i690.photobucket.com/albums/v...m/P5050362.jpg

Also, here are some side kicking pictures just for the hell of it:










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Old 05-05-2011, 10:05 PM #5
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Default Re: Questionable Rayfoss drivers.

WTF mates?

That's fairly messed up huh? I know I've seen/heard of multiple red's in this style dying after a unreasonable amount of time. Just dying.

Guess that mystery has been solved!
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Old 05-05-2011, 10:18 PM #6
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Default Re: Questionable Rayfoss drivers.

Yup.

The picture of the driver there with capacitor added, I also added small heatsink to the transistor there, and wrapped the entire thing in heatshrink tubing again to hold it in place.

Works like a charm now, measured 160mW , with draw of 290mA out of the battery.

Guess that's low-ish but it's only a plastic lens in there (AR coated but still).
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