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My awesome fun with a 445 (sarcasm)

TTerbo

TTerbo

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Hey guys
i got my 445 LD this morning. i ran of to school happy and couldnt wait to get home.i watched the clock tick around to 3:15 the bell went. i got home as quickly as i could. i opened the package with my preset driver set to ~420 i tested it at 423mA. i shorted the driver pads and soldered up my diode with minimal heat possible with my expensive temp controlled iron.
i put the batteries in the host. ~7v (rckstr driver) turned it on........I HAVE LIGHT awesome 445 light oh wait nooooooooooooooooo it turned LED after 4 seconds of use. :(
biggest laser diode waste of money for me so far :( $60 down the drain.
wish i knew what was wrong :(
cheers

Dang pontiacg5 i should have bought that second 445 instead of the host

just to let you know....you wont be seeing a 445 from me anytime soon

dam even my post count matches the event 666 :eg::eg:
 
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aryntha

aryntha

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LEDed at 423mA? That's .. really odd.. I wish I knew what was wrong, too. Are you SURE it's LEDed? That's.. not too far even above lasing threshold on these things.
 
goninanbl00d

goninanbl00d

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Sorry to hear about your loss. :(

The diode should be fine with a rckstr driver at 423mA.

Actually- did you forget to un-short the driver afterwards?

Could have even been ESD. Do you use ESD protection when working with the diode?
 
TTerbo

TTerbo

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yeah i hav this ESD wriststrap thingo......
and its definatly LED i would even send it to bobhaha for him to confirm it...
i am 98% sure i didnt o anything wrong :( shitty casio projector grrrrr
 
goninanbl00d

goninanbl00d

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Shit happens. Thank god everyone else hasn't had such instadeath problems.

If you're still pissed off at it, ramp the current on the driver RIGHT UP. As far as the potentiometer goes ( TEH KNOB DOESN'T GOES[sic] TO ELEVEN!). And connect it. It's supposedly dead anyway.
 
bobhaha

bobhaha

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With a DDL driver you are going to experience a 2.5v drop in VF as well as the VF drop from the diode its self.... So in this case you are going to get approx 2.5 + ~4V drop from the set up... there is a chance that under load your batteries do not have enough voltage to run the laser... try placing a 9V battery in and see if you get any output..
 
goninanbl00d

goninanbl00d

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A lab power supply may be a better idea than any battery. These things draw a lot of current, more than a 9V battery can provide.

9V batteries have trouble keeping a PHR fed- I'd doubt they'd be good for these.
 
TTerbo

TTerbo

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i will try my power supply now


EDIT: Still an LED :(.
 
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bobhaha

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goninanbl00d said:
A lab power supply may be a better idea than any battery. These things draw a lot of current, more than a 9V battery can provide.

9V batteries have trouble keeping a PHR fed- I'd doubt they'd be good for these.
Click to expand...

Good point, didn't think of that! Well I didn't mean use a 9v battery, just use batteries at 9V... should of worded it better.
 
TTerbo

TTerbo

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its LED he has already passed through the gates of the diode devil :(
i am actually really upset at the moment. i waited 2 months and payed $60 dollars for that friggen diode!
 
goninanbl00d

goninanbl00d

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I have an idea. You aren't too happy, right?

Well, want a 1000+mJ pulsed one-shot 445nm emitter?

Well, do you have a disposable camera with flash?

On a more serious note, really sorry to hear about your loss. Hope your next diode turns out better.

And I thought my first blown LCC was bad...
 
TTerbo

TTerbo

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yes i am friggen depressed...may aswell give up :(
yeah il just attach it to my 20 photo cap bank charged to 300v
o_O
 
goninanbl00d

goninanbl00d

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Leave it in the module. Screw on an acrylic lens you don't mind losing. Aim the diode at a white piece of paper.

One end of the cap bank to the diode, the other end to the base. Charge it up to about 300V, and fire away. Video the whole thing showing the paper. I'd actually laugh if there was a flash of blue 445nm light.

Anyway, cheer up. Shit happens, and there's nothing you can do about it. If it makes you feel any better, my only green module's died. The doubling crystals bit the dust and it began putting out more IR than green. On top of that, I still need to buy motor mounts for my spiro. I don't have a single working laser at all. I've just sent off my hard drive for RMA so it'd be at least three weeks before I have access to a decent computer. Then there's everyone asking me how's my lasers coming along. If everything went to plan I'd have at least one functional laser.

Oh well, I digress. Cheer up boy, at least it wasn't a 12x sled.
 
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