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Old 09-04-2010, 03:58 AM #33
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Default Re: Active cooling in a handheld using a fan

I ran across small dc fans (0.5"x0.5"x0.25) in some CNC controllers and they might work great in flashlight sized hosts. I hope to lock down a vendor and price next week. You interested?


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Old 09-04-2010, 03:59 AM #34
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Default Re: Active cooling in a handheld using a fan

regular dc or surface mounts?
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Old 09-04-2010, 04:02 AM #35
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Default Re: Active cooling in a handheld using a fan

Regular 5-9vdc DC smallest fans I have ever seen in a finished package, and not just open blades.
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Old 09-04-2010, 04:38 AM #36
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Default Re: Active cooling in a handheld using a fan

they prolly come from a/cs for geckos....lol

bet they wont be cheep...
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Old 09-04-2010, 04:42 AM #37
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Default Re: Active cooling in a handheld using a fan

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Originally Posted by hakzaw1 View Post
they prolly come from a/cs for geckos....lol

bet they wont be cheep...
lmao @ geckos

They look like normal every day little box fans except they are damn tiny. I hope the won't be expensive, but if they are a special part with low volume manufacturing.....well that's not cheap....
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Old 09-04-2010, 04:57 AM #38
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Default Re: Active cooling in a handheld using a fan

Small is beautiful in my eyes and those 20mm ones still come into, "too big for a handheld", territory for me.

The 5-9V is a bit of an obstacle but I guess they'd run on 3.7V, just not to capacity. I wouldn't want to be putting a driver in just for a fan!

I'd still be in for one or two of those 20mms anyway as I have a need...

As before, keep me posted!

Thanks guys.

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Old 09-04-2010, 05:23 AM #39
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Default Re: Active cooling in a handheld using a fan

What about an 8mm*5mm fan?

http://www.sunonamerica.com/pdf/mmf.pdf

FAN MIGHT MINI 3VDC 8 X 5MM - UF385-500

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Old 09-04-2010, 05:42 AM #40
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Default Re: Active cooling in a handheld using a fan

Quote:
Originally Posted by Uranium View Post
those would be about the right size. they are $20ea, not sure if we can find a lower price. I'll see what I can come up with, but it probably won't be any cheaper.
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Old 09-04-2010, 05:44 AM #41
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Default Re: Active cooling in a handheld using a fan

I may be being stupid but why does it have 3 wire output? Direction control?

Very nice find Uranium. At close to $20, it's an expensive do-hickey but might be worth a punt for sh*ts and giggles.

I will be storing this info for later...

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Old 09-04-2010, 05:46 AM #42
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Default Re: Active cooling in a handheld using a fan

Quote:
Originally Posted by Morgan View Post
I may be being stupid but why does it have 3 wire output? Direction control?

Very nice find Uranium. At close to $20, it's an expensive do-hickey but might be worth a punt for sh*ts and giggles.

I will be storing this info for later...

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The third wire (yellow) is for when it's used in a computer.

It's the tachometer pin. It allows the motherboard and BIOS to monitor the fan's RPM.
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Old 09-04-2010, 05:47 AM #43
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Default Re: Active cooling in a handheld using a fan

^^^beat Me to it^^^
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Old 09-04-2010, 05:52 AM #44
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Default Re: Active cooling in a handheld using a fan

I doubt you'll find a cheaper one.

Anyway, I just found my 5000rpm mini fan. I forgot how loud they were!
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Old 09-04-2010, 05:52 AM #45
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Default Re: Active cooling in a handheld using a fan

Ah, thanks some more... Guess it'll either be, 'ON', or, 'OFF', in our applications then!

M
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Old 09-04-2010, 05:53 AM #46
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Default Re: Active cooling in a handheld using a fan

Fan voltage is proportional to fan speed.
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Old 09-04-2010, 06:18 AM #47
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Default Re: Active cooling in a handheld using a fan

well seeing those 20mm fans are great and if one was willing to cut them up a little i am sure you could get them to be around 15mm removing the outer ring, then its just a matter of gluing it to your heatsink and presto a super small fan cooled laser.
although at 20 mm and a bit of rounding the corners it would fit a good 1in heatsink
although for my personal one if i remember the inside is around 1.25 in so a 30mm fan might be better going to watch this.
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Old 09-04-2010, 10:18 PM #48
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Default Re: Active cooling in a handheld using a fan

40 fans and 80 heat sinks "in stock" . . .



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