Re: Re: [OT] LED Dimming

["Frank Mc Alinden" <fmcalind@xxxxxxxxxxxxxx>]

Hi David

> To dim LEDs properly requires a PWM controller.  LED dimming is
pretty
> tied up in patents and patent litigation, so these aren't exactly in
> over-supply.

I  was hoping to make an  xPL-LED dimmer just using a pic .....Is there
more
to it than just using the pwm feature of the pic ???...The idea was to use
one pic for pwm to give 8 channels and another pic to talk xPL.....and use
mosfets to drive the leds ...........??am i missing something here?
Frank

----- Original Message -----
From: "David Buckley" <db@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Friday, March 25, 2005 10:18 PM
Subject: [ukha_d] Re: [OT] LED Dimming


>
>
> --- In ukha_d@xxxxxxx, "Brian Milton" <bmilton@b...>
wrote:
> > Sorry about the OT.
>
> Question is not OT.
>
> > But I need to know if LED lights can be dimmed?  And if so do
> > they need a specific transformer to do it or will my digidim do
it.
>
> To dim LEDs properly requires a PWM controller.  LED dimming is pretty
> tied up in patents and patent litigation, so these aren't exactly in
> over-supply.
>
> But, if you have LEDs running off an unregulated supply with a proper
> (as in magnetic, not electronic) transformer, such as an unregulated
> wallwart PSU, and you plug it in across an incandescent load, it does
> work.  Without a parallel incandescent load its not likely to work at
> all well.
>
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>
> Yahoo! Groups Links
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