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It's a sad day

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BlueFusion

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I just murdered my first SenKat LD. :(
And at only 230mA ish which says on the datasheet it shoulda been about 200mW max.
I know the current because I hooked it up through my freakin multimeter...
gah...
im sad now. im gonna go pull open a drive of some sort... cd, hdd, dunno
 





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Things

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hmmmm 230ma seems abit too much, did you have any heatsinking?? the ratings on the data sheet are for pulsed, not CW
 
T

Things

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well my LD died instantly on 200ma without a heatsink, so that may be the prob, better luck next time though!
 
T

Thories

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i think my LD (not a SenCat) is weird i got it out of a dvd RW and well nothing ive done killed it. hell ive given in 2-3 second bursts of 2AA and it is still as powerful as ever, tho its does have some relitivly reasonable heat sinking maybe it jsut lases at a higher voltage/current and thats why... dunno, but... im sorry for your loss....
 
Benm

Benm

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I'm a bit surprised by this. 230 mA is way above spec for CW operation, but i think many people here, including me, run these diodes at such currents with no problems at all. Without heatsinking it might very well overheat, but i doubt that would happen in seconds even if its just in the aixiz module head.

Are you sure your power supply is clean, and that there is no ouput cap that gives it a jolt when you connect things?
 
A

Aseras

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How did you have you multimeter connected? Where were you reading the current from?
 
B

BlueFusion

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From the power source obviously. Multimeter was connected right for current.
And there was a cap but its SOLDERED to the LD.
It was a classic power on - very bright for about half a second, dims to bad LED.
 
Gazoo

Gazoo

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BlueFusion said:
I just murdered my first SenKat LD. :(
And at only 230mA ish which says on the datasheet it shoulda been about 200mW max.
I know the current because I hooked it up through my freakin multimeter...
gah...
im sad now. im gonna go pull open a drive of some sort... cd, hdd, dunno
Click to expand...

I am just curious as to what you were using as a power supply. Please forgive me if you noted it somewhere else..I don't recall. Was it a lab PS, Daedal's circuit, batteries?
 
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xgeek

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I have been running one of my torches since Saturday at 250mA and it is still going strong. I do have 3 large washers fixed to the AixiZ module as per Daedals laser torch tutorial. I limit my on time to 60 seconds or less and the wait 20ish seconds before the next burst. The AixiZ module does not even get warm.

I don't think 250mA is too much as long as you follow a duty cycle and have a heat-sink.
 
Gazoo

Gazoo

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That's kind of what I am getting at. I made one powered by three eneloop AA batteries. I put a cap. directly across the diode, and used a silicon diode in combination with a 1.9 ohm resistor to regulate the current. It runs at 250 ma's on fully charged batteries with no heat sinking in a standard Aixiz module, and gets only slightly warm after a minute.

I sent this one off to another forum member..I hope it lasts awhile.. ;D
 
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