Spehro Pefhany wrote:
>
> At 09:18 PM 8/3/01 +1000, you wrote:
>
> >Something i've been doing lately is using the
> >high-intensity leds. The 600mCd, 900 and 1600
> >leds are getting quite cheap, and they are
> >EXCELLENT for giving good light at 1mA or less,
> >even 250uA gives a good indicator.

> Yes! The red ones are more than reasonable.
> GaAlAs red super-bright LEDs are the way to go if you can
> live with red. You can use a little 1206 4 resistor network
> and get the parts count down to almost zero. But for some
> reason the product appearance is considered by some to
> be better when you have yellow and green as well as red,
> and run at ~10mA. ;-)  (Also there may be CE issues with
> red for some applications).

I get them from www.jaycar-electronics.com and
they stock yellow and green (and blue and white)
all in about 5000mCd, although I prefer the cheaper
green 350mCd and yellow 160mCd which are still
SO much better than a standard 10mCd 5mm led...


> The best ones are (expensive) but visible in a dark room
> with literally a few microamps, none of this ~1mA offset
> current that early GaAs LEDs had.
>
> You've got a drawer full? That's a lot! I've only got about
> 10K of the 3mm ones on hand at the moment and it doesn't take
> up much space. ;-)

Touche! I have a small plastic drawer about 1/3
full, in my parts drawers, a couple of hundred.
Is that better?? ;o)
-Roman

PS. Am I the only person who thinks they should
put a coloured spot or something on the leds??
It's a pain having to power them up to see the
colour and brightness. Maybe we need a new
"led colour code"...

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