- May 2, 2008
These look pretty badass 8A though :undecided: golly. How to supply such?
There is a huge difference between how much power you can install in a host between LEDs and halogen/incandescent light.
Lightbulbs get rid of most of their heat the same way as they do of light: out of the front, as invisible IR radiation. This is easily 90% of the heat produced, and also the reason you can run a 500W halogen lamp without any heatsinking whatsoever, as long as its not enclosed.
The heat created by LEDs and lasers is at much lower temperature, and radiating that away doesn't work very well, which is why heatsinks are required.
Lets see about that big red led here: about 8 amps at roughly 4 volts, call it 30 watts for a round figure. That is as much as the average laptop computer uses, and believe me, those do not work very well under load without the fan running, despite they have a way bigger surface area than any flashlight.
So yes: it is cool! For 10 seconds tops
:thinking: Sounds a little like your presuming a Phlatlight flashlight wouldn't have a fan?Lets see about that big red led here: about 8 amps at roughly 4 volts, call it 30 watts for a round figure. That is as much as the average laptop computer uses, and believe me, those do not work very well under load without the fan running, despite they have a way bigger surface area than any flashlight.
Alright, just to confirm..
I know that AMC1735 chips can be added to each other in parallel.. just like in the four- chip boards that DX sells. -----> DealExtreme: $16.58 AMC7135 1050mA Regulated Circuit Board for DIY Flashlights 10-Pack
Is there any reason why I couldn't use 7 of these boards in parallel to drive the emitter?
I can provide heatsinking if needed, but I don't think that will be an issue If I use the 3.3V rail on a high current ATX psu. The drivers won't have to dissipate more than 1V, and the PSU will be able to supply well over the 7.4 amps going through the 7 boards.
Any issues? Any reason why I might be a fire hazard beyond typical measures?
I asked if you could put this in a flashlight... everyone said it would have to be freakin HUGE...Holy $hit!!! I am kicking myself in the face for selling all 3 of thes I had. That would make a sick flashlight. If anyone feels up to building me one I would trade a 1 watt 445nn laser for one.
There is a green phosphor wheel that produces the green light from some of the blue LD's.