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



DIY:My 1st build, a 1.5W labby for ~60$

vk2fro

Well-known member
Joined
Nov 30, 2009
Messages
1,301
Points
63
Stand well back, grab a a spray can, and let the laser cook it. (flash powder is optional)

Just kidding, but superheating some thermite (outside!!!!) could be fun :)
 



vk2fro

Well-known member
Joined
Nov 30, 2009
Messages
1,301
Points
63
I didnt even need to click the link - my first 150mw labby had a missile switch on it! :)

"ok you asked for it. Going weapons hot.... banking left..... i have him in sight. request permission to engage the target...." ;)
 

GreenBeam

New member
Joined
Jan 9, 2011
Messages
77
Points
0
lol DIE! stupid slow old floppy :p
:D I'm wondering what happened to the wall, behind it, after the laser burned thru the floppy. :D

I never thought to use an old psu case, this could be the perfect host for the C-mount 5watt diodes,
or even the TO3 case.

There's lots of room in there for heat-sinks and power boards. :)
 
Last edited:

benmwv

Well-known member
Joined
Sep 10, 2010
Messages
1,389
Points
48
I have one suggestion, buy an extra charger (7.2 volt one) and take it apart then solder wires to the output and hook it up to your batteries inside and just leave the cord sticking out of the psu so you can plug it up to charge. Thne it would be just like a normal labby but you can just "go mobile" and unplug it and take it wherever.
 

vk2fro

Well-known member
Joined
Nov 30, 2009
Messages
1,301
Points
63
Also, line up a bunch of those floppies, and time how long your labby takes to burn through them. Someone did this with a pile of CD cases, but floppies are harder to burn (they're twice as thick) :)
 

JaiNobeZ

New member
Joined
Jan 21, 2010
Messages
973
Points
0
vk2fro, i get the impression you like floppies quite a bit. I'll trade a few of mine for a PHR sled. :)
 

alf638

New member
Joined
Dec 10, 2010
Messages
221
Points
0
Nice build, since I saw it a while ago i've had the (possibly), crazy idea to make a set of these 1W PSU's in as many colours as I can. I just realy like lab style lasers and these just look so cool:drool:.


Stand well back, grab a a spray can, and let the laser cook it. (flash powder is optional)

Just kidding, but superheating some thermite (outside!!!!) could be fun :)
No flash powder here, it's near impossible to get any potassium perchlorate in Australia (as i'm sure you know), bloody government.;)
 

JaiNobeZ

New member
Joined
Jan 21, 2010
Messages
973
Points
0
Ask user cssshih about his experiences with flash powder. :crackup:
 

alf638

New member
Joined
Dec 10, 2010
Messages
221
Points
0
Sounds interesting, perhaps I will, perhaps I will...
 

vk2fro

Well-known member
Joined
Nov 30, 2009
Messages
1,301
Points
63
put a white fusion kit in there and you can have several colours in the one box :)
 

anselm

New member
Joined
Nov 22, 2010
Messages
2,470
Points
0
vk2fro said:
put a white fusion kit in there
I'd absolutely love too, I thought they were not being made anymore...
That's Flaminpyro who is/was taking care of those, right?

As for now, I got me a big ole 25Ohm potentiometer (tuned with an extra ~4ohm parallel) wired on top of that other mess in there.
Makes the current adjusting oh so much easier and more fun!
http://laserpointerforums.com/f48/video-raw-output-blue-nichia-diode-60488.html

________________
Next up:
A second lm317 in parallel for more reliable delivery of high currents.
And then maybe finally wire up that dead weight of a fan.

Still thinking about some status leds, but for that plus the fan it should better
have a dedicated battery.
buy an extra charger (7.2 volt one) and take it apart then solder wires to the output and hook it up to your batteries inside and just leave the cord sticking out of the psu so you can plug it up to charge.
Instead of cramming in more weight and circuit's, I might just install a female power socket, so I can
run it off any 1.5A wall transformer when at home...
 
Last edited:

anselm

New member
Joined
Nov 22, 2010
Messages
2,470
Points
0
:wave::wave:
Wow, this thread has gotten quite the numbers of views!:eek::D

Anyways, it's been a few weeks and I wouldn't want to withhold the latest "upgrades"
I've been cramming into my little tinkerbox.

First of all, it now has a 25Ohm potentiometer so I can go all "smooth operator" on
the the current adjustments. Very nice!


It's getting a little crowded in here! I wonder how this spark-magnet doesn't short out itself randomly.:shhh:


A second LM317 in parallel, for that extra oomph:eg:
One is adjusted by 3 of the DIP-switches, the other by that 25Ohm potentiometer which has been tuned with ~4Ohm in parallel and ~0.6Ohm in series.


Can I haz, plz: tripod mount, active cooling and power-on LED (just in case you miss the other blue light);)

No, I don't yet have a thermostat switch for the fan, it's boringly manual on/off.:p
I have yet to perform a relentless high current torture, but preliminary empiric data
suggests a cooling effect of promising proportions.:D
_______________________
In progress:

The next problem now is, 2x18650 is not enough voltage to consistently
push more than ~1.5A for any period of time greater than just a few minutes.:undecided:
So instead of putting a 3rd battery in series, I'll put another pair in parallel.:evil:
That should even out the load and generally just provide better autonomy as well.

Eventually:
-When I'm happy with the internals (yeah, one day when a pig grows wings:rolleyes:)
it will get a nice, intact "bonnet/hood" with a bigger heatsink as well.
-Also I'm likely to shamelessly steal Markus' idea with the meter.:bowdown:
Although I'm just gonna gut an extra 5$ multimeter I have lying around, slacking off.:D
 
Last edited:

Leodahsan

New member
Joined
Aug 7, 2010
Messages
2,088
Points
0
When you talk about "labby for $60" it attracts many viewers :shhh:
good build tho :beer: ;)
 

anselm

New member
Joined
Nov 22, 2010
Messages
2,470
Points
0
Yeah, well that was the first version, by now it's gone a bit over that initial budget:D:D
I guess this one is the version 1.9(beta).
Everybody knows upgrades cost money.:whistle:
Maybe shoulda change that title...:p
 




Top