Re: Water in the bathroom get way too hot
- From: Mark Lloyd <mlloyd@xxxxxxxxxxx>
- Date: Sun, 25 Dec 2005 10:19:09 -0600
On Sun, 25 Dec 2005 06:16:25 -0500, mm <NOPSAMmm2005@xxxxxxxxxxx>
wrote:
>On Sat, 24 Dec 2005 10:49:18 -0600, Mark Lloyd <mlloyd@xxxxxxxxxxx>
>wrote:
>
>>
>>
>>Some people don't know what "positive" and "negative" mean. Negative
>>feedback is used in more places than positive. Even in AGC (Automatic
>>Gain Control) in radios.
>
>It *was* AVC, automatic Volume Control in radios, and AGC in tvs.
>(although they might be both AGC these days. I don't know.)
I hear "AVC" more than "AGC", but "AGC" seemed more correct
(considering that that's what it does).
Also (considering negative feedback), I remember reading about steam
turbines using negative feedback to control speed (valve would let
more steam in if speed was too low). Then there was this man who hated
machinery, and liked to change that feedback to positive.
--
0 days until the winter solstice celebration
Mark Lloyd
http://notstupid.laughingsquid.com
"Democracy is two wolves and a lamb voting on what
to have for lunch. Liberty is a well armed lamb
contesting the vote." - Benjamin Franklin
.
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