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Subject: Re: help for a total newbie
Organization: The Armory
X-Newsreader: trn 4.0-test69 (20 September 1998)
From: email@example.com (Richard Steven Walz)
Date: 20 Oct 2002 05:32:48 GMT
In article <firstname.lastname@example.org>,
>I'm pretty new to electronics but my dad is helping me out and
>Basically, here's the deal:
>I'm trying to find the schematics for a circuit that I can use as an
>electonic dimmer switch for 110V 100 watt (or less) lamp. I'm trying
>to build an electonic dimmer switch (as apposed to the normaly
>I don't really know how much explaining this needs, so I'll just
>rambel on and on... I guess more info is better than less. What I'm
>aiming for is to create a box that will have several of these boards
>that I want to make mounted in it. Coming out of one side of this box
>(let's call it the Control Box) will be lead wires to two electric
>switches, one that will dim the lights and the other that will
>brighten them. Then the other side of this box will have several plugs
>so i can plug lamps into it. I would like the lights to be controlled
>(dim or brighten) infinately as apposed to incramentally. I hope you
>all know what I'm talking about...
>I'm using this as a entry-level project to begin studying elctronics.
>Any/all help or suggestions for websites that have light control
>schematics on 'em would be greatly appriciated!
You need to learn how plain dimmers work, they use TRIACs which are
set to turn on at preset levels of the AC sinewave. Or more sophisticated
units use a square-wave chopper with a variable duty-cycle. Learn what
these things mean and then you will see that you don't need much of an
"infinite" variation, because they are turning on and off real fast to do
the dimming anyway! In fact incremental dimming with lots of steps will
be totally inobvious to the human eye. Of course there are ways to do it
with continuous adjustment, but they are more unwieldy to do electronically
and dissipate waaay too much power!
>Feel free to e-mail me iLuke@NOSPAM.com. Replace NOSPAM with
You mean "the-techie".
-Steve Walz email@example.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
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