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Addendum to: coming soon leadlight pen

Shotgundrums

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Welp, she won’t make the Obituaries... but I killed a nice diode. I finally got time to sit down and put all of this together. All was going AWESOME!! I was so careful. And then a fatal mistake put this diode’s dick in the dirt:(
Continue below.

_____________________________________

Excuse my ramble....
This driver is an x-switch 320mA fixed; the last Flaminpyro had in fact. Originally, I purchased a Mit LPC840 from Paul.
I soldered some designated contact springs to the driver. X switch is configured case pos when the switch is active. So I had to isolate the module eventually.

Wired it all up in series and...LED. Can’t think of where I went wrong...I was grounded...but it was dead.
Paul asked me if I have a test load. My answer was a regrettable, no. He said it would be a good idea to test the current of the driver to be sure it was “320mA” and not the 1A version. Since I’ve been meaning to buy one... Immediately, I did.
4 weeks pass and test load arrived. Paul helps me with the last little noggin-scratch I had on understanding the testload’s simulation.
I wire her up...she puts out 323mV...alrighty.
So, something I did must’ve killed the 840.

- - While I was waiting on the test load, I went ahead and bought another red diode, an GGW Red.

Today, I pressed the diode into the module and proceeded to assemble the pen.

The x switch driver will not fit into the leadlight driver plastic suspension. So I improvised and made my own out of a dead hilighter marker...fit quite well!!
The GGW red fired right up with a beautiful, rich, 650nm ruby red.

As for the module’s isolation, I coated it with a very thin coat of clear and very hard epoxy.

Carefully lined it all up and packed it down the muzzle.

Took her outside to focus it...I wish I took a picture of this part :( it was great.

I got back inside to install the cap.

Vvvvvvvvvvvvvvvvvvvvvvvvvvv
>THIS IS WHERE I KILLED IT<
^^^^^^^^^^^^^^^^^^^^

I didn’t press the module in quite far enough and the lens barrel just barely made contact with the cap.

Sound, TAPS bugle
 

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BobMc

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Sorry to hear that Shotgun. So close, saw some photons, but no cigar. Gotta break your heart.

:cryyy: :cryyy: :cryyy:
 
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paul1598419

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Man, that's awful, Josh. You have the worst luck, buddy. So sorry to hear of your loss. Third time's the charm?
 

Richie89

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I never like hearing when someone kills a diode! :(
I actually have two laser kills under my belt, first was the MITS500 and the second was a PL520.
hope it works out when you rebuild it buddy :beer:
 

Shotgundrums

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Yeah I think third time is the charm, Paul lol. I’ll get it write. Shoot me a pm if you’ve still got that last 840.

Josh
 

paul1598419

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From where you are, you should be able to get one from China faster and cheaper than from me. I do have one left, IIRC. I was saving it for a possible 420 mW build. It might be able to output that much, or it will die in the process of trying to get it there. I have a build with one that is very close to 400 mW, but never pushed one hard enough to get over that 400 mW goal line. It is a project for sometime when I'm not as busy as I am now.
 

Mattronium

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RIP laser diode(s). :( At least it was a lower cost diode.

I have a similar setup with a 5mW 635nm laser where the only electrical insulation between the case positive module and negative from the housing casing is a single layer of electrical tape. It won't take much to short it out and kill the diode. It's a cheap build though, so I don't worry myself over it.

Nice avatar BTW.
 

Shotgundrums

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From where you are, you should be able to get one from China faster and cheaper than from me. I do have one left, IIRC. I was saving it for a possible 420 mW build. It might be able to output that much, or it will die in the process of trying to get it there. I have a build with one that is very close to 400 mW, but never pushed one hard enough to get over that 400 mW goal line. It is a project for sometime when I'm not as busy as I am now.
Understood. Yeah I could probably order one or three from techhood. Just gotta see about borrowing a Japanese address.

Cheers :beer:
 

paul1598419

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That's is what I would do, Josh. The diodes are pretty cheap now. Less than I paid for the last one I have. Plus you have to pay me shipping and they are shipped free from Techhood. LPC-840 is the complete number.
 

CynicalBrad

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Darn, add another diode to the graveyard. Hope to see this one when you get a new diode.
I always love seeing new builds. Helps me with some of my mood issues if you believe that.
Glad it was an LPC-840, not something rarer or pricier.
 

Shotgundrums

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Darn, add another diode to the graveyard. Hope to see this one when you get a new diode.
I always love seeing new builds. Helps me with some of my mood issues if you believe that.
Glad it was an LPC-840, not something rarer or pricier.
Yeah I get that. Hobbies should be that way. These were very cheap diodes. It wasn’t a total loss as this was educational.

Techhood wasn’t able to ship to APO, and shipping cost to Japan...I’ll have to pocket that for a nicer diode on their shelves someday.

But, new red diode is on the way. As are new heatsinks from Lifetime17 for a C3 build. I’ve been waiting on a Flexdrive and an empty 3.8mm diode module from DTR too...hopefully not held up
in customs’ slimy dick fingers.

Cheers fellas and thanks for all the moral support. You guys are awesome :beer:

Josh
 
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paul1598419

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I didn't know you were going to have so much trouble getting another LPC-840, Josh. If you want, I'll press my last one in a module of your choice and send it to you at whatever Techhood is charging for them now. Just send me a PM. :wave:
 

Shotgundrums

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I didn't know you were going to have so much trouble getting another LPC-840, Josh. If you want, I'll press my last one in a module of your choice and send it to you at whatever Techhood is charging for them now. Just send me a PM. :wave:
I’m sincerely greatful, brother. Go ahead and hang on to it for the build you mentioned:) I’ll send you a pm shortly cause I got another?...

SGD
 

paul1598419

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Glad you did, but my offer is open in case you change your mind. Let me know if there is anything I can do to help. :D
 

Shotgundrums

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So, last Friday I received Flaminpyro’s diodes; an LPC-826 and a GGW Red. Actually, Jeff sent me two GGWs. One happened to be an opened up can, labeled freebee. How incredibly generous!! Today, I squished the 826 into a module and wired it up to the driver, turned it on....dim....
I know, right?! Well, I put the driver back on my test load to see if anything changed. Almost nothing to read. :thinking:
I took apart the Red Richard for a surrogate driver;nano buck/boost, put IT on the test load...275mV.
I Put my suspected previously LEDd GGW diode on the driver, squeezed on a battery
(Final Fantasy battle victory music). It works! Put the LPC826...it works, the new and open can GGWs, they all work. I thought for sure the LPC-840 would work....nah.
Suffice it to say, the x-switch driver was canxed.
I have 3 GGW reds now lol. Anyone wanna horsetrade?
I can’t wait till DTR gets more FlexdriveV5 in stock. Maybe I’ll put a little switch behind one and finish this pen.

Anyway, that’s all for now. Thought I’d report my findings.

SGD
 




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