Ogg, any chance you'll be willing to make more of those heatsinks? Just curious.
Let me 2nd that.
Ogg, any chance you'll be willing to make more of those heatsinks? Just curious.
My name is DanielI ordered a driver on 9-3-09, it's now sat happily in a 2C Mag. I checked the current in series with the LED and got 2.8A. I did find the board got very hot were the wopping great transistor was... so this is my solution!
+ Arctic Alumina...
It was powering a MC-E 'till i broke it (long story) but is now feeding a DSWOI P7 and i haven't had any troubles yet...
Just thought i'd share...
Dan
I've found that a good way to sink these boards is to pot them in heatsink paste (the setting kind) from either dx or kd and them make a sandwich of copper sheet that fits into a piece of copper pipe ~ 1/2" long then AA the slug to the flashlight body. I use these to drive 3 q5's in parallel(I know this is supposed to be a bad idea but it's been working for over a year now) in old vistalite bike light heads with additional copper added to the outside and copper nails drilled through and soldered as vias to aid in heat transfer. The lights never dim while riding and only heat up when I stop which is when I dim the light anyway. The stock switch in the lamp head works both as a momentary (normally closed) switch to change modes and full click to power on/off. I have the newer ones which do have memory. The power fet and the inductor on one side and the two ic's on the other should all be AAed to the heatsink. If you remove the positive contact you can solder a new vin+ to the other side and have all your wires on one side. This helps immensely for my purposes. If you have just a little more room, Georges Maxflex driver from Taskled works GREAT at pushing 4 epg r5's at 1.3 A and is about the size of a quarter. If you ran your mce/p7 2s2p it would be only slightly underdriven and mulltiple leds would be even more efficient.Has anyone figured out yet exactly which components are kicking out all the heat in the latest batch?
I just had the possibly crazy idea of using one of those fan-powered LED lights to control the dimming of a bike light. I wonder if that would work...The lights never dim while riding and only heat up when I stop which is when I dim the light anyway.