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ArcticMyst Security by Avery

Chaos Emerald Keychain

Joined
Jun 14, 2017
Messages
452
Points
63
Today, I completed a long awaited keychain laser. The host is a cheap LED flashlight which used 4 LR44 button cells. The anodized color and size told me I had to build a tiny laser with it:D. Components are DTR PL520 with Nano buck/boost driver at 275mA, Copper heatsink from LPF’s renowned Lifetime17 :D....and a single tiny 10220 LIion.
Not sure how long the battery will last yet but this little booger sure is cool. It was a tremendous PIA to assemble as tiny builds usually are. But, it’s done.
The driver is shrink wrapped, leads protruding just enough. I used heatsinking RTV between the module and wrapped driver... Makes for great stability and ridgidity.
Enjoy the pics
SGD:beer:
 

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Joined
Jan 29, 2014
Messages
12,031
Points
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Nice tiny laser, went together well, thank you for sharing :)
 
Joined
Sep 16, 2007
Messages
3,658
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Nice. I like how you sandwiched the driver in there. I’ve been thinking about doing something similar. Is it pretty sturdy with the adhesive you’re using?
 
Joined
Jun 14, 2017
Messages
452
Points
63
Nice tiny laser, went together well, thank you for sharing :)
Thanks, Alaskan!!

Nice. I like how you sandwiched the driver in there. I’ve been thinking about doing something similar. Is it pretty sturdy with the adhesive you’re using?

It is stable. The driver had to be isolated because of the “sammiching.” The RTV makes a nice rigid pedestal for the module and protects the leads. Then, the module and heatsink are individually set screwed:)
Thanks for tookin!!
SGD
 
Joined
Sep 20, 2013
Messages
17,254
Points
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That is a very tiny build. With a green diode set at 275 mA, that little battery will run low very fast, I'll bet. Can't wait to see what you do with that 507nm module. It really looks good with the 520nm AR coated 2 element lens. Thanks for sharing it here.
 
Joined
Dec 15, 2014
Messages
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Hi SGD,
Wow nice EDC in green to match the WL, I'll bet it was a pain with all those small parts and to fit it . Well looks like you have a great little build there keep the good work job well done.

Rich:)
 
Joined
Jun 14, 2017
Messages
452
Points
63
That is a very tiny build. With a green diode set at 275 mA, that little battery will run low very fast, I'll bet. Can't wait to see what you do with that 507nm module. It really looks good with the 520nm AR coated 2 element lens. Thanks for sharing it here.

Paul,
Yeah the batter will last probably half that of a 10440 as it’s half the size. I charge them with a tiny Adafruit micro usb charger. Can’t wait to start the 507:D



Hi SGD,
Wow nice EDC in green to match the WL, I'll bet it was a pain with all those small parts and to fit it . Well looks like you have a great little build there keep the good work job well done.

Rich:)

Thx, Rich! That was the remaining heat sink you turned for me months ago. It was a challenge to build. I even had to ever so slightly round the corners of the driver.


Thx, fellas!!
SGD:beer:
 
Joined
Sep 20, 2013
Messages
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Points
113
It might be a bit brighter than this one. I thought it came out looking very nice, with a very visible beam. :D
 
Last edited:

jnrpop

0
Joined
Dec 7, 2008
Messages
722
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Everytime i walk past those 2‎€ led flashlights in the shop, i think yer why not, that could be a laser :crackup:, and you've done it :D. Great little build, matching colors and a great diode, the PL520.
 
Last edited:

BowtieGuy

0
LPF Site Supporter
Joined
Oct 14, 2012
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What a cute little keychain build, SGD, nicely done! :beer:
Now all you have to do is add it to your sig. :yh:
:gj: +rep!
 
Last edited:
Joined
Sep 20, 2008
Messages
17,622
Points
113
Today, I completed a long awaited keychain laser. The host is a cheap LED flashlight which used 4 LR44 button cells. The anodized color and size told me I had to build a tiny laser with it:D. Components are DTR PL520 with Nano buck/boost driver at 275mA, Copper heatsink from LPF’s renowned Lifetime17 :D....and a single tiny 10220 LIion.
Not sure how long the battery will last yet but this little booger sure is cool. It was a tremendous PIA to assemble as tiny builds usually are. But, it’s done.
The driver is shrink wrapped, leads protruding just enough. I used heatsinking RTV between the module and wrapped driver... Makes for great stability and ridgidity.
Enjoy the pics
SGD:beer:

:gj: on your small build...
Now all you have to do is measure
the output power...

Jerry
 
Last edited:
Joined
May 9, 2015
Messages
1,181
Points
113
thats so cool SGD! i cant tell by the pics, is the neg soldered to the outside of the battery board?
 




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