From: John DeGood <john@degood.org>
To: 9fans@9fans.net
Subject: Re: [9fans] Plan 9 on VIA C7
Date: Sun, 10 Jul 2011 20:35:44 -0400 [thread overview]
Message-ID: <4E1A4560.8040607@degood.org> (raw)
In-Reply-To: <CAP6exYLP0UUrK9a8_t-OpWGuD7i-gnW7kqcedB7=w-ts3QVK6g@mail.gmail.com>
To assign proper credit, I learned that trick from the 264x terminals
manufactured by HP in the mid-to-late 70s. In those days most computer
fans still used AC motors, so HP operated 240 VAC muffin fans at 120 VAC
to exhaust the terminal heat in a virtually silent fashion. Modern
(brushless DC motor) computer fans can be similarly tamed by reduced
voltage, or by PWM.
John
On 7/8/2011 5:59 PM, ron minnich wrote:
> What you see strapped to it is a 12V fan from a dell desktop which I
> ran at 5V, not 12V (a trick I learned from John DeGood). Very little
> air had to move, it was noiseless, and it all cooled right down. You
> don't need huge noisy fans in all cases.
prev parent reply other threads:[~2011-07-11 0:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-06 18:34 Akshat Kumar
2011-07-06 19:06 ` Lyndon Nerenberg (VE6BBM/VE7TFX)
2011-07-07 5:21 ` cinap_lenrek
2011-07-07 7:56 ` Akshat Kumar
2011-07-07 8:00 ` cinap_lenrek
2011-07-07 8:16 ` Akshat Kumar
[not found] ` <CABwSpPCnw2A80_gCxxN-6eH21Dg4oEF=Td6V4XuC1yEs3pTayg@mail.gmail.c>
2011-07-07 15:28 ` erik quanstrom
2011-07-08 20:02 ` Eris Discordia
[not found] ` <98341AF97AF04C5D2915B463@192.168.1.2>
2011-07-08 21:59 ` ron minnich
2011-07-09 0:26 ` Eris Discordia
[not found] ` <6F7509F3840C27B44BBE7F9F@192.168.1.2>
2011-07-09 4:13 ` ron minnich
2011-07-09 10:35 ` Bruce Ellis
2011-07-09 20:55 ` Eris Discordia
[not found] ` <D7303FDC7DBEC8EE3E08B624@192.168.1.2>
2011-07-09 21:01 ` ron minnich
[not found] ` <CAP6exY+JYUPZR9vvdNbYydp1b9qavDCrEHJt5hddCcaLeE==8A@mail.gmail.c>
2011-07-09 21:04 ` erik quanstrom
2011-07-11 0:35 ` John DeGood [this message]
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