Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donations

Links below open in new window

ArcticMyst Security by Avery | Browser Hide by Avery

445nm "Evolution" DIY 250mW

Joined
Sep 16, 2007
Messages
3,660
Points
113
I just assembled 97% of my 445nm Evolution.
Edit: 100% complete.

The diode is from an A130 projector.
Current is unknown, power output is set to 375mW. Edit: This laser has been turned down to 250mW.
Driver is V5 FlexDrive, lens is Aixiz 445nm. The switch is a constant on/off forward clicky. It is powered by 2 NiMH AA batteries.
The activation indicator is the excess output from the diode fed through the module by fiber optics.
The plastic "plug" in the host that covers the indicator is apparently not cut right on the inside, so the indicator light is not a perfect "dot." I didn't want to fiddle with it for risk of breaking it trying to get it out.

This project was pretty simple. It is not much different than any other pen type lasers, which I build a lot of.
I measured the transmittance of the AR coated for green window and found that it actually does a good job of passing 445. IIRC, the loss to the window was less than 5%. Back reflection is not an issue.
I did run into some problems with electrical contact. The safety pin mechanism of the Evo is really crappy. It worked ok with the original green module installed, but with the FlexDrive, the poor contact was very noticeable. I had to bypass the safety pin because it simply could not be fixed, in my case. The inside of the lock is cheap plastic and was cracked and the pin was too thin to make even contact. I never used that feature anyway. Anyone that wants do do something similar... be warned. The safety mechanism may be problematic.
It took me 3 hours of fiddling before I gave up and bypassed the damned thing.

Anyway, this thing rocks. I will have to do something about the wickedlasers logo, though.
I am running it with a loosely enforced 2 minute on, 2 minute off duty cycle. I am not afraid to run this diode hot and the aluminum body does a good job of removing heat. I would not recommend >400mW for this host.
The heat transfer is good, but there is not enough mass or surface area to make this a reliable Class IV. At 500mW this diode will be dumping a lot of heat.
It is fixed focus, set for lowest divergence. This was not meant to be a burner, but it will burn.
I like how this project turned out so much, I may make another with a 638nm diode if I can afford to do it before school starts this semester. ;)

More details will be provided once it is 100% complete.

Click thumbnails for full size:











"World's most powerful military grade blue laser pen."
I did it first, Steve Liu. :na:

Don't trust the marketing hype. :D
 
Last edited:





Joined
Apr 12, 2010
Messages
279
Points
0
Re: 445nm "Evolution" DIY

killer! a little longer than i would personally enjoy, but a wicked clean and near OEM looking build!
 
Joined
Jul 25, 2008
Messages
504
Points
0
Re: 445nm "Evolution" DIY

I'm liking that host.
What kind of battery life are you getting out of it?
 

CDHDC

0
Joined
Dec 3, 2009
Messages
248
Points
18
Re: 445nm "Evolution" DIY

Sweet build! Nice job. Are you able to focus it, or is it set to infinity?
 
Joined
Mar 8, 2010
Messages
206
Points
0
Re: 445nm "Evolution" DIY

Nice looking build and I wish I could upgrade my Wacom tablet to the new version you have!
 
Joined
Sep 16, 2007
Messages
3,660
Points
113
Re: 445nm "Evolution" DIY

I'm liking that host.
What kind of battery life are you getting out of it?

I do not know yet. I am charging up a pair of batteries now. I have only tested it with some used batteries.
It seems that this diode is asking for more than half-empty NiMH can provide, since I am getting intermittent activation. The FlexDrive may be having a hard time boosting the voltage with a ~2.48V battery source. Fully charged at 1.45V per cell, it should not be a problem.

Sweet build! Nice job. Are you able to focus it, or is it set to infinity?

This is set at infinity. It can easily be made focusable, but it's not a feature I want on this laser.

Nice looking build and I wish I could upgrade my Wacom tablet to the new version you have!

Thanks, and thanks.
My girlfriend got me the Intuos 4 for Christmas last year. I love it. It is actually the first tablet I have owned. I just need a better drawing program since the lines in Photoshop CS3 are not as clean as I would like.
 
Joined
Feb 29, 2008
Messages
2,344
Points
0
Re: 445nm "Evolution" DIY

Another fantastic build RA_P.

How did you take apart the evo?

Rob
 
Joined
Sep 16, 2007
Messages
3,660
Points
113
Re: 445nm "Evolution" DIY

Another fantastic build RA_P.

How did you take apart the evo?

Rob

The module of the Evo is pressed in with some sticky junk to keep it in place. It's a CNI module, BTW, for those that may not know.
First, pull the button out. Then the entire module can be pulled out the front. I have some special "laser extraction tools" that I use. They just thread into the module so I can grip onto it with the vice and pull it out in a few moments. It makes disassembling pens easy.
 
Joined
Jul 15, 2010
Messages
57
Points
0
Re: 445nm "Evolution" DIY

... I was going to buy an Evo with my next paycheck and do exactly this. You did a beautiful job on this build. Would it be easy for a laser of this size to be turned up to
>500mW? I was concerned with heat dissipation, and started considering an original Spyder III host. I don't have one handy, so would have to buy it. I already have a greenie I'm satisfied with, though, so it would just be for my 445 build.
Again, really excellent job. This and the Spyder 2 Laser_freak worked on are two of the best blue DIY's I've seen. Kudos.
 
Joined
Sep 16, 2007
Messages
3,660
Points
113
Re: 445nm "Evolution" DIY

... I was going to buy an Evo with my next paycheck and do exactly this. You did a beautiful job on this build. Would it be easy for a laser of this size to be turned up to
>500mW? I was concerned with heat dissipation, and started considering an original Spyder III host. I don't have one handy, so would have to buy it. I already have a greenie I'm satisfied with, though, so it would just be for my 445 build.
Again, really excellent job. This and the Spyder 2 Laser_freak worked on are two of the best blue DIY's I've seen. Kudos.

Thanks.
I would not recommend >400mW for this host.
The heat transfer is good, but there is not enough mass or surface area to make this a reliable Class IV. At 500mW this diode will be dumping a lot of heat.
I will include that in the original post.
 
Joined
Jul 15, 2010
Messages
57
Points
0
Re: 445nm "Evolution" DIY

Thanks.
I would not recommend >400mW for this host.
The heat transfer is good, but there is not enough mass or surface area to make this a reliable Class IV. At 500mW this diode will be dumping a lot of heat.
I will include that in the original post.

Thanks for the info! I think I'll opt for the Spyder host, then. I want a blue meanie with some kick. I'm happy to see these cool Evo hosts being put to good use. Keep it up! +1 Rep!
 
Joined
Aug 3, 2010
Messages
28
Points
0
Re: 445nm "Evolution" DIY

I just need a better drawing program since the lines in Photoshop CS3 are not as clean as I would like.

use adobe illustrator and you can make your lines whatever thickness you need. you just put in the actual real world measurement ( 0.0125") you need to match and it will produce it. since it's made with vector data, it is mathematically based (as opposed to raster data made up of pixels), so it can be enlarged or shrunk indefinitely.... and much easier to edit the data on your schematics and layouts when changes are needed after testing....

:D
 
Joined
Mar 8, 2010
Messages
206
Points
0
Re: 445nm "Evolution" DIY

Thanks, and thanks.
My girlfriend got me the Intuos 4 for Christmas last year. I love it. It is actually the first tablet I have owned. I just need a better drawing program since the lines in Photoshop CS3 are not as clean as I would like.

I can tell you CS4 had a big improvement with support for the tablets! You might want to check and see if Adobe has any patches or if Wacom has any firmware updates for the tablet. I know with mine a few years ago (I have the intuos 3) there was a patch from both Adobe and Wacom and it was a big change for the better!

use adobe illustrator and you can make your lines whatever thickness you need. you just put in the actual real world measurement ( 0.0125") you need to match and it will produce it. since it's made with vector data, it is mathematically based (as opposed to raster data made up of pixels), so it can be enlarged or shrunk indefinitely.... and much easier to edit the data on your schematics and layouts when changes are needed after testing....

:D

That is true about illustrator, but it's harder to reproduce a real life looking sketch. Also you are limited on shading, erasing, etc. I like to use illustrator for logos, reproduce diagrams, maps, web buttons, etc.

Sorry for the off topic posts!
 
Last edited:
Joined
Sep 16, 2007
Messages
3,660
Points
113
Re: 445nm "Evolution" DIY

I can tell you CS4 had a big improvement with support for the tablets! You might want to check and see if Adobe has any patches or if Wacom has any firmware updates for the tablet. I know with mine a few years ago (I have the intuos 3) there was a patch from both Adobe and Wacom and it was a big change for the better!



That is true about illustrator, but it's harder to reproduce a real life looking sketch. Also you are limited on shading, erasing, etc. I like to use illustrator for logos, reproduce diagrams, maps, web buttons, etc.

Sorry for the off topic posts!

I didn't even think to use Illustrator! I can't believe it.
I have the entire CS3 master collection I forgot I had it.

I will try it.

I do like that I can cut corners a lot with photoshop when drawing textures. And it does give it a more realistic look, but it's hard to do line drawings with photoshop. On paper, I can make a nearly perfectly straight line. I can also free hand a pretty decent circle. But with the tablet in photoshop, my lines come out squiggly. :o
I can't believe I didn't remember that Illustrator uses vectors. It would be much easier to make my line sketches. A lot cleaner, too. I used to use Illustrator a couple years ago when I was making business cards and merchandise for my buddy's band.

I'm drawing an Archeopteryx right now just to practice. I might post it up here when it is finished so you guys can see what I draw. :D

Well... I successfully derailed my own thread.
 
Last edited:
Joined
May 4, 2009
Messages
2,295
Points
113
Re: 445nm "Evolution" DIY

Its looks great with the blue beam coming out of it! What did you end up doing with the
original green module after you removed it from the pen?
 




Top