You don't know til you try . . .


How big a heatsink do you need to run a green laser pointer continuously?

, posted: 7-Jul-2012 09:53

At least this big. Ambient 15degrees Celsius.
Photobucket


Purchased from eBay, us$4.61 including shipping.
http://s.f-shot.com/181bc523b1053313c9d870c0f28853ab


I need to run them 12 hours at a time, overnight for a project.
Due to the low price these do need a few seconds to warm up.
Once warm they behave as normal.
They start dimming when the case get to 28+ degrees.
Case is diameter 13.75mm. I only have a 13.5mm drill bit so a little pressing with the vice get's it in there.
I could also have scrapped off the rubber black coating for better heat transfer/fit.
Or used a smaller/no heatsink and fan.
Being battery powered why waste energy when you can go passive.
Will also be quieter.

**LASER WARNING**
While they many only seem like toys with 5mW of power they are still dangerous due to the concentrated nature of the beam.
Keep away from eyes and planes.



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Comment by jmumby, on 7-Jul-2012 22:18

What kind of project need a green laser for 12 hours!


Comment by kiwitrc, on 8-Jul-2012 06:21

Comment by jmumby, on 7-Jul-2012 22:18 , user id: 57773) What kind of project need a green laser for 12 hours! When you are aiming it into a fixed speed camera lens from your flat :)


Author's note by MrWestie, on 8-Jul-2012 22:45

lol, no speed cameras on my itinerary. Although an interesting proposition.
I would use IR laser though if I was. It is to add some ambience during a MilSIm Night Airsoft game. Breaking into a fake military installation is more exciting if it is surrounded by lasers.


Comment by freitasm, on 9-Jul-2012 09:13

Just make sure those green laser aren't pointing at anyone's eyes. They are not toys...


Author's note by MrWestie, on 9-Jul-2012 09:35

Thanks for the reminder. Have updated the post with a warning.


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