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From: John Woodgate
Subject: Re: help for a total newbie
Date: Sat, 19 Oct 2002 17:33:18 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Sat, 19 Oct 2002 16:34:09 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that iLuke wrote
(in <firstname.lastname@example.org>) about 'help for a
total newbie', on Fri, 18 Oct 2002:
>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!
Like others have said, DON'T start with 110 V stuff. You can do what it
seems you want with 12 V or 24 V lamps these days. I understand you want
to make a 'dimmer board' similar to those used in theatres. It's a good
idea and can be very interesting. You get the 12 V or 24 V AC from an
isolating transformer fed from the mains, and the low voltage means that
you don't have an electric shock hazard.
The basic circuit uses a triac, some resistors and capacitors. However,
the way you want to control the dimming means that you will need to add
what you will find to be quite a complicated control circuit.
This si quite a big project for a beginner.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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