9mm 445 from 1913

[djLscatt]

A friend of mine asked me to resurrect his old flashlight from 1913 and make a 445 laser.
here is what I did:

I use a 9mm 445 diode, thanks DTR.
a Xboost driver kindly range at 1.5A for a long life of the diode, thanks Clif and Lazereer.
a heatsink and focus, thanks Flaminpyro

firstly, i isolated the switch with the heat shink tubing for the negative contact.

the driver is extra heatsinked

the silicone wire is strictly solded between the switch and the driver

here it goes.

nice beamshot with a cotton bud

LPM 2300 MW

thanks for looking...

 

[Leodahsan]

Wow. Great work there!!!

Some kind of aging on the aluminum heatsink would be great!

Seriously. Where he got that flashlight at? Pretty cool!!

Edit:
some aged laser labels would fit GREAT this host... Something like "prototype laser device" :crackup:
1913 is a bit soon for lasers to exist but anyways...

 

[jander6442]

Love that look man sweet. Try not to heatsink the induction coil that could possible spell trouble.

 

[Leodahsan]

Try not to heatsink the induction coil that could possible spell trouble.

Care to explain... :thinking:

 

[jander6442]

Quote from forum member Le Quack:

I wouldn't recommend putting any heatsink material onto the inductor... by adding metal, you're changing the properties of the inductor, increasing or decreasing the inductance. It can change how efficiently the driver works.

That and you're basically causing heat to the heatsink anyway, but not in the manner you're thinking of; the losses of the heatsink metal are a lot higher than the ferrite core, so the metal will basically "induction heat" itself without contributing anything positive to your pill...

I could go into many others from past post.

 

[Leodahsan]

Quote from forum member Le Quack:



I could go into many others from past post.

Thanks. But me thinks a copper heatsink that small should make no difference there... :thinking: considering its permeability is 6milimu smaller than vacuum (0.999994 versus 1).... I think it should be completely negligible... :thinking: (considering some materials permeability used in inductors are high as 50kilomu)
I may be wrong tho...

 

[djQUAN]

Think eddy currents.

Eddy current - Wikipedia, the free encyclopedia

 

[jander6442]

Thanks. But me thinks a copper heatsink that small should make no difference there... :thinking: considering its permeability is 6milimu smaller than vacuum (0.999994 versus 1).... I think it should be completely negligible... :thinking: (considering some materials permeability used in inductors are high as 50kilomu)
I may be wrong tho...

You could be right and it prolly will be ok, but the chunk is about as big as the inductor.:na:

 

[DTR]

Very nice build. Always love seeing these old school lights used as hosts.:beer:

 

[razac]

That's one cool looking host

 

[djLscatt]

thank you all of you

I didn't know I had to put a heatsink on the induction,I put a heatsink because it was too hot, that must be why I have only 1.5A instead of 1.9A max on the xboost

 

[grainde]

Great job! Those old hosts look fantastic and it looks like you put a lot of thought and effort into building it. Thanks for sharing +1 :beer:

 

[djLscatt]

Seriously. Where he got that flashlight at? Pretty cool!!

He got it on ebay for just $10
when I first saw it I laugh, it looked very crapy.
at the end it's cool.

 

[Flaminpyro]

Nice review, more pictures makes it all the better, great job on making this cool laser :gj: +4

 

[KRNAZNBOY]

Hey, nice build! Also a very efficient diode in my opinion! My 9mm at 2.4 amps was giving 2600mw

According to my calculations, of course, not accounting for the efficiency curve and whatnot, your diode at 2.3 amps should give out 3.5 watts!

This is, of course, probably not realistic, as i am leaving out many variables. I just did a quick amps to watts ratio and set the amps to 2.3.

Prob be more than 3 watts tho!

Good build!
:beer:
-Matt

 

[djLscatt]

I use only 1.5A for a long life.