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Old 12-01-2007, 08:03 AM #1
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Default safe voltage and current for SenKat's LDs

Hi guys,

I'm using SenKat's LDs with no additional heatsinks but my cycle is limited to < 1 min.

Currently driving it at 3.0v at 260mA is this safe or too high?

Is it safer to crank the current or the voltage up?

Thanks.


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Old 12-01-2007, 11:37 AM #2
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Default Re: safe voltage and current for SenKat's LDs

Do you recall what teh spec sheet said?

Quote:
Originally Posted by cyclonite
Hi guys,

I'm using SenKat's LDs with no additional heatsinks but my cycle is limited to < 1 min.

Currently driving it at 3.0v at 260mA is this safe or too high?

Is it safer to crank the current or the voltage up?

Thanks.
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Old 12-01-2007, 12:01 PM #3
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Default Re: safe voltage and current for SenKat's LDs

The spec sheet says 130 mA i think... i'd recommend some form of cooling when going beyond that, and good cooling when running at 260 mA... it'll probably live for a while, but you -are- pushing it.
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Old 12-01-2007, 12:39 PM #4
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Default Re: safe voltage and current for SenKat's LDs

Really? Ohh shucks that's bad.....

Thanks anyway guys.
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Old 12-01-2007, 12:50 PM #5
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Default Re: safe voltage and current for SenKat's LDs

If I recall - I think lotsa folks on here have published their personal favorite limits to be around the 200ma mark....I personally prefer to see a lot more red than that :P But then again, I have been spoiled with these lasers !
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Old 12-01-2007, 04:28 PM #6
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Default Re: safe voltage and current for SenKat's LDs

no way.... 230ma was just barely enough for me... I'm quite happy with 260ma ;D furthermore I have 2 more of your LDs stuck at my friend's place and once I get them I'll have some backups :

Thanks so much anyway
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Old 12-02-2007, 03:19 PM #7
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Default Re: safe voltage and current for SenKat's LDs

Quote:
Originally Posted by SenKat
If I recall - I think lotsa folks on here have published their personal favorite limits to be around the 200ma mark....I personally prefer to see a lot more red than that :P *But then again, I have been spoiled with these lasers !
Hehe.. you're also lucky to have 100s of them laying around i guess, so blowing one up doesn't matter all that much

Still, at any current over 200 mA i'd suggest at least providing a heatsink of sorts... mounting it in a metal flashlight body will probably be sufficient, but using only the bare aixiz module will make it run warm.
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Old 12-02-2007, 06:10 PM #8
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Default Re: safe voltage and current for SenKat's LDs

I am running a SenKat diode with 270ma's. Is it safe?...probably not. Is it fun...yes.. ;D
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Old 12-02-2007, 06:26 PM #9
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Default Re: safe voltage and current for SenKat's LDs

My favorite one has an abnormally low Vf, and I'm running it just over 300mA. It probably has more than 3 hours on it so far. Tuff little guy. ;D
/me wished he had gotten in on the LPM-1 GB.
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Old 12-02-2007, 07:50 PM #10
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Default Re: safe voltage and current for SenKat's LDs

I just built a dorcy jr putting out exactly 300ma and it's putting out peak at 200mw!! *blew my mind cause as of before this one have never broken the 200mw mark.

As a side note, with the additional heatsinking I'm using inside my dorcy's this baby starts to warm pretty quickly so I keep my run time down to below 1 minute.
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Old 12-03-2007, 02:41 AM #11
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Default Re: safe voltage and current for SenKat's LDs

How hot do they get?? Just warm to the touch? Or really hot like 70 degrees?

Thx.
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Old 12-03-2007, 08:29 AM #12
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Default Re: safe voltage and current for SenKat's LDs

70 degrees C? or F? 70*F is not very warm, lol...
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Old 12-04-2007, 12:46 AM #13
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Default Re: safe voltage and current for SenKat's LDs

Are you using a regulator, or just a resistor? I always wonder when I see anybody talking about setting the voltage rather than the current, or setting both.

Yeah, I run at 250mA but I wouldn't do it without a heatsink.
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