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Message from discussion Light timer/dimmer?
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Rich Webb  
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 More options Jul 5, 7:24 pm
Newsgroups: alt.electronics, sci.electronics.design
From: Rich Webb <bbew...@mapson.nozirev.ten>
Date: Sat, 05 Jul 2008 10:24:41 -0400
Local: Sat, Jul 5 2008 7:24 pm
Subject: Re: Light timer/dimmer?
On Fri, 4 Jul 2008 23:08:58 -0700, dpl...@radagast.org (Dave Platt)
wrote:

>>I have a need to control a light fixture in my home. At a certain time I
>>need the light to come on and later on the light should go out. The problem
>>is that I need it to change states slowly. Load could be anything between
>>100 and 600 watts.

>I believe that some of the professional-grade X10 light-dimmer control
>circuits have this basic capability, and there are probably some
>variations that can handle up to 600 watts.

FWIW, the "regular" X10 controllers can dim from 100% to 0% but they
don't want to go the other way; a lamp that's off can only be set to a
dimmed brightness by first turning it on (=100%) and then dimming it.
Once it's on, of course, the dimming setting can be adjusted up and
down; just can't go directly from off to, say, 10%.

Note that the controllers I'm running are pretty old and the newer ones
(or other models) may not have this limitation.

--
Rich Webb     Norfolk, VA


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