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In Reply to: RE: How hot is too hot? posted by vinnie2 on June 02, 2017 at 16:22:14
A way to use a fan, with minimal noise, is by employing a cheap, large diameter, "230" VAC fan on "115" VAC. The fan will turn slowly, being under voltage, and that generates little noise. OTOH, even when turning slowly, large blades move quite a bit of air.
Eli D.
Follow Ups:
80mm 12V computer fans (rescued from the tip) run from a variable LM317 based PSU at approx 5V are silent in my set up. At least until they age, and then I replace them. Set the lowest voltage at which they start.
I went a different way with a fan.
I'm using a 5" AC-to-DC pancake fan, that is of decent quality with ball bearings.
Pretty quiet, and it does a good job of keeping my old Triad USA power transformer nice-n'-cool.
Steve
Antec has a line of fans designed for computers. I have a few of their 120mm fans, which, on their slow setting, are almost silent. At the price, I find them hard to beat.
WW
"A man need merely light the filaments of his receiving set and the world's greatest artists will perform for him." Alfred N. Goldsmith, RCA, 1922
Do you happen to know what voltage they run on? Believe it or not it's not in the spec sheet.
Ah. They are 12 VDC, which is often available on various plugs in Wintel PCs. The ones I got years ago had the standard PC 4-pin power connector, like the larger end of the adapter in the attachment. You can google the standard for those connectors to see what's on which wire, or just use a DC voltmeter to figure out which wires to use.
Make sure your wall wart will handle the combined amperage of the fans you're installing. Then strip the wire ends, connect them with twists, and cover with electrical tape of shrink wrap. Solder them if you want to. Connect multiple fans in parallel, so every fan gets 12V. Add an on/off switch if needed.
As always, there is no free lunch. The fans I have do not move a lot of air on low, but are so quiet I can't hear them unless I'm within a foot or so. On high, I can hear them at arm's reach, but just barely. The more air you move, the more noise you'll have to deal with. Pick your poison.
Cheers,
WW
"A man need merely light the filaments of his receiving set and the world's greatest artists will perform for him." Alfred N. Goldsmith, RCA, 1922
It's a thought. Are they easy to find?
Edits: 06/03/17
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