- May 14, 2013
Thanks for posting this. Very detailed with great photos. +rep for your clever design.
I timed this a while ago. It's not going to break records on duty cycle but it's much longer than predicted. :beer:Love to see how this turns out but slightly worried about the size of the heat sink. IMO its not large enough to handle a 9mm for more than 30sec on 60 off. Yes the area of the heatsink might be large but there isn't much material there.
The fan placement helps out a ton! Didn't realize it was going to be so close!I timed this a while ago. It's not going to break records on duty cycle but it's much longer than predicted. :beer:
60sec on (until the copper module becomes uncomfortably warm)
30sec off (heatsink back to room temp)
Since it's a momentary button operation, duty cycle shouldn't be a problem. :shhh:
Uh no. Reversing the polarity of a DC brushless fan does not make it spin backwards and the blades are shaped so that it moves air in one direction. Reversing the spin wont move a useful amount of air.Is the fan pushing or pulling? Not sure how much heat the drivers and other electronics create, but I'm guessing not as much as the diode. If the fan is pushing, reverse the polarity and get it to pull clean air from the front of the laser. See how those duty cycles compare.
Just a thought in the event its pushing. Nice pictures. Where are you in the Philippines? My cousin and uncle live in IloIlo. Thanks for the updates....