Some technical questions for new built

[numquamretro]

Hi guys!

After measuring the power of my green Lasever module, i decided it deserves a new selfbuilt host. I just measured all dimensions of module and driver. I want to drive it with a 26650 battery, since it draws 4,5A at 3,2V. So with higher Voltage its even more. I tried it shortly with 3,5V and it was already over 6A of draw. Therefore i want to change it from the 18650 to the 26650 batt.
I am going to make the new host completly out of copper, because of the better heat conduction. One thing i dont understand: the module is made out of brass, wich conducts heat only half as good as aluminum and only quarter as good as copper. Is there a reason for using brass? The driver has some electrical parts wich need to be cooled. I want to get them fitted to the copper host. For this i am going do design the host in 3D CAD.
Now my questions:
-Is there a recommendation for a good and small keyswitch wich can take over 6A of current draw?
-I´d like to be able of closing the front end of the laser like the Herkules lasers, with turning the front tip. http://www.dragonlasers.com/catalog/photos/800/h1.jpg
Are these systems available?
-I want to integrate the focusing in a way, that i can change it from the outside. Don´t have a good concept yet.

Greetings,
numquamretro

 

[numquamretro]

Her is a first try for the host. I´ll try to keep it simple but effective. The front part is out of copper, the battery chamber out of aluminum. Any ideas for improvement?
No ideas for my questions before?

Cheers

 

[Livinloud]

if you can actually make that laser then that would be pretty sweet! the front copper part looks sick with the fins facing forward!

 

[numquamretro]

if you can actually make that laser then that would be pretty sweet! the front copper part looks sick with the fins facing forward!

crafting it would not be a problem. but it should also be effective for cooling and so on.

 

[Livinloud]

crafting it would not be a problem. but it should also be effective for cooling and so on.

multi-purpose, looks good and is effective :beer:

 

[numquamretro]

multi-purpose, looks good and is effective :beer:

thx :beer:

 

[Lazerbeak]

Sweet looking host :gj:

 

[Sigurthr]

Looks excellent but I would increase the outer diameter of the copper section and then deepen the fins. This will increase surface area for increased dissipation as well as give it a larger overal heat capacity.

 

[norbyx]

Before you decide to make your copper host I would reccoment you read this old thread that has some interesting information on why copper is not always the best solution...

HERE

 

[phenol]

Why is cuurrent draw increasing by such a great amount when you boost the input voltage? This shouldnt be the case if the driver inside is linear and operating properly...

 

[Sigurthr]

I'm thinking either it doesn't have a proper driver or the Vf and Vdrop are not fully satisfied (perhaps it wants 4.2V?).

 

[Speedy78]

That host would also look good all aluminum. I would definitely buy one like that though. Sweet host.

 

[numquamretro]

Looks excellent but I would increase the outer diameter of the copper section and then deepen the fins. This will increase surface area for increased dissipation as well as give it a larger overal heat capacity.

yeah, i thought about that too. i just used the 40mm outer diameter because i have a solid copper piece like that laying around. but for this host i would be willing to buy another one with 50mm. i´ll do another drawing with more and deeper finns and 50mm outer dia.

because of the discussion if copper or not: i am absolutely sure about that. for all my flashlight mods i use copper. and with the fins i am sure it does better than steel or aluminum (even if steel has a higher heat capacity).
and copper looks great too

well... if someone else uses the lasever module, i could craft more of these hosts.

for the driver: i think it usually draws between 5-6A. it only goes down if the voltage drops that much. its a step-down driver.

 

[Lazerbeak]

Sir, this is Awesome :gj:
Green laser handheld 190 balloon pop record in a row 1500mw lasever module not krypton Laserpointer - YouTube

 

[numquamretro]

Sir, this is Awesome :gj:
Green laser handheld 190 balloon pop record in a row 1500mw lasever module not krypton Laserpointer - YouTube

thx

 

[scumbagatheist]

This is very exciting, Num! Way to not take the easy route by buying a green diode!

I look forward to seeing your project become reality!