RE: LEDs

["Paul Gale" <groups@xxxxxxxxxxxxxxxx>]

Ta Frank.

There seems to be little difference between 4K7 and 10K - even 33K is
still=
very bright - might even try something higher.

Paul.



> -----Original Message-----
> From: Frank Mc Alinden [mailto:fmcalind@xxxxxxx]
> Sent: 11 May 2004 08:35
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] LEDs
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> Hi Paul
>             Do you need to go up to 33k...??? I would have thought
> 4k7...to
> ...10k would be suffice...
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> >Are there any disadvantages to using such a large resistor value?
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> Just not as bright........On my Probe Zone Monitor i use 1k on the bi
> coloured leds @ 5v and they seem bright enough.....
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> Frank
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> ----- Original Message -----
> From: "Paul Gale" <groups@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Tuesday, May 11, 2004 5:30 PM
> Subject: [ukha_d] LEDs
>=20
>=20
> I=92ve just fitted a couple of waterproof LEDs to an external alarm
keypa=
d I
> bought the other day. The LEDs are 12V, red and green. They=92re not
> intensity
> matched though unfortunately so the green LED is significantly
brighter
> than
> the red. I=92m going to drive them both from a Comfort output.
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> I was thinking of using a high value resistor on the green LED (33K as
> opposed to 1K for the red seems about right). Are there any
disadvantages
> to
> using such a large resistor value?
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> Paul.
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