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Feel the Heat. I need a mass advisory.

Toaster

Toaster

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I built my 445 all copper SS 18650 host running a Micro Boost drive and the duty cycle is about 6 minutes before it is too hot to hold. (Almost to touch)

Anyhow, I wanted to know how the heat of the 12x Blu-rays compared to the heat generated by the 445s. I was thinking about using a SS C3 host instead just as a change of pace. It sounded like a great idea until I started to think about, (you probably guessed) heat. I know the higher the current, the higher the heat, but is it as much as the 445s? I figured I would run it around the zones DTR run it. Oh yeah, its the sled from Rayfoss. :)

So yeah, do you people think?
 





im not to sure but my 445's gets verry hot verry fast compaired to my 12x's but then again my 445's run at about 1000ma and my 12x's 400/500ma i have a 12x running 500ma in a Ultrafire A10 14500 host takes quite some time before it gets warm..
 
Tikilaser said:
12X will not heat up as much, and it should be fine with a duty cycle (though probably a long one). the 445s are not very sensitive to heat but if it becomes to hot to hold you should NOT be leaving it on. You say at 6 minutes...try maybe 4 min on 2 min off?
Click to expand...

Well Duh :) I ran it for 6 min to see how it sucked the heat.

How are people achieving these crazy 30 minute tests. In the hosts.
 
Well, to put some figures on it...

P = I x V

Therefore...

a 445nm running 1Amp and at 4.2V will show a total power output of 4.2W. Assuming it's outputting 1W as light, this means it's disappating 3.2W as heat.

A 405nm running 500mA and at, say 7V, (possibly an over estimate), will show a total power output of 3.5W. Assuming it's outputting 700mW then it will be disappating only 2.8W as heat.

Efficiencies differ and the two could end up being pretty close but it doesn't take into account the heat from the driver.

I'm not sure how you'd work that out but that should illustrate the point.

M
:)
 
That depends on what you run you it at but the point is they are close.

Any host that heats to a point you can't touch it will likely do the same with a 12x but just take a slightly longer time to get there.

M
:)
 
Well of course.:) I do have a brain :) I think I will have to get another SS 18650. They are sure yummy.
 
Don't tell me what to do. I can light my house on fire if I want to.

I was testing it.
 
Toaster --

Sorry, I can't resist anymore!!!!!

If you are feeling heat, You better go to Mass next Sunday !!! jk

HMike
 
Why would I need that? I have seen that before and I know what I am doing for the most part, Just needed info for heatsinking the diode. I think the driver will be fine.
 
All we can suggest is attempt mo get better efficiencies in your diode through driver adjustments, as Morgan said, get a larger heat sink also one that will fit tight enough that you have to press fit it in. Maybe a larger host.
Also you could get fancy and use a more efficient heat sink than copper and thermally isolate it from the host it's self, rarely seen on LPF.

other than that, if you want same host, all I can do wish you best of luck! :p
 
I am not saying I want 5 min runtimes. I never said that. Just for general purpose. Also I am not using a flex, you want to use boostdrives on BRs anyway.

ALSO diode are in a heatsink so how would I feel that? I can feel the heatsink. Running BR at 1 amp is death. SO why Would I go over 1 amp.

Engage brain before the typing
 
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