RE: _Very_ soft start and slow fade for lights!

[andy.powell@xxxxxxx]

>>You can use an opamp to butter
>>the output of the capacitor.

>I find modern opamps a bit small for that, much prefer a bread knife
:-)

If you were designing your own circuit... wouldn't you also use a
breadboard for a prototype?? ;-)

A.







Nigel Orr <nigel@xxxxxxx>
25/10/2000 15:34
Please respond to ukha_d


To:     ukha_d@xxxxxxx
cc:
Subject:        RE: [ukha_d] _Very_ soft start and slow fade for lights!

At 14:09 25/10/00 +0100, you wrote:
>You used the "M" word !!!

Sorry :-(.  I bravely resisted following it with a footnote to say that I
accidentally visited the "M" site today with Java turned on (I
usually
keep
it off), and it repeatedly crashed my browser- sometimes I think they're
trying to *lose* customers with that site...

>BK Electronics http://www.bkelec.com did sell some self
contained single
>channel dimmers but I cant find them on their website.

I've contacted Mode- I presume http://www.mode-lighting.co.uk
was the
company you were describing, it looks reasonably promising.  I'll try BK
as
well.

>Control current... a few milliamps normally.

OK, so I would probably need an opamp or a slow sawtooth-generator. That's

probably an easier answer if I do have to get the soldering iron out...
the
linearity of the fading isn't really an issue, as it's going to be so
slow.

>You can use an opamp to butter
>the output of the capacitor.

I find modern opamps a bit small for that, much prefer a bread knife :-)

>Just what is this person doing that needs a simulation of daylight ;-)

It's a long, long story :-) .  The daylight simulation 'reference' was
just
to make it a bit easier to describe...

Nigel










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