Re: LEDs too bright

["Neil Fuller" <neil@xxxxxxx>]

One single resistor will work OK if the same number of LEDs are always on,
otherwise, you'll find that they get brighter and dimmer depending on the
number of LEDS on.

One other thing to bear in mind, if you use one single resistor, make sure
it's sized correctly to dissipate the correct power. Not knowing how many
LEDS you are using, if you use a little (1/8w or somesuch) resistor, it may
get rather warm or even burn out.

HTH

Regards

Neil
----- Original Message -----
From: "Dean Smith" <ukha@eatworms.org.uk>
To: "Ukha_D@Yahoogroups. Com" <ukha_d@yahoogroups.com>
Sent: Saturday, January 24, 2004 6:40 PM
Subject: [ukha_d] LEDs too bright


> I've just put together a faceplate for heating control via Comfort.
Its
just
> a couple of clipsal momentary switches and some LEDs - controlled via
> Comfort's 12V supply
>
> The LEDs are the style with built in resistor from Maplin - but
they're
too
> bright. Presumably I can simply add an external resistor to reduce the
> supply voltage to dim them down, but can I add a sinlge resistor to
the
12V
> LED supply line - or Do I need a seperate resistor in-line with each
LED ?
>
> Thanks
>
> Dean
>
>
>
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