Newsgroups: sci.electronics.misc
Subject: Re: modulated dimmer "switch"
References: <[email protected]>
"2apart"  writes:

> Do they make cheap signal modulated (verses turn with a wheel) dimmer
> switches.
> 
> I want to control some display lights, 5 channels, about 300W per
> channel.
> 
> Modulate with analog io board.  

Here is one module:

DC CONTROLLED DIMMER
http://www.velleman.be/ot/en/product/view/?id=354314

It takes DC control voltage in and dimmes light. 

I have used the previous revision of that module on 
some light ptojects. Worked well. 

Other option is to check the prices of cheap "DJ quality" 
multi channel dimmer packs. Those can be foudn nowadays 
at quite cheap price. Those are normally controlled 
either with 0-10V DC control voltage or DMX-512 digital 
bus. 

DMX-512 might be worth to check tecnology. 
You just need a suitable adapter for your PC and run 
suitable ligth control software to do whatever you need.
No I/O card needed. Links to DMX-512 information can be
found here:


> (not an exotic pattern, maybe they even
> sell
> simple sequencing units with multiple channels .. I've seen slow
> switched 
> xmas lights that do that)
> 
> Thanks
> 

-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/