Re: TI-H: Re: LZ: Backlighting
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Gary Marsh wrote:
>
> On Mon, 21 Oct 1996, Zenon Lynx wrote:
>
> > : From: list-zshell@lists.ticalc.org
> > : To: Zenon
> > : Subject: Re: LZ: Backlighting
> > : Date: October 20, 1996 5:23 PM
> > :
> > :
> > : > ultrabright LEDs if you can find clear white ones (or even blue...?
> > but
> > : > not RED!!) then it would be good...LEDs take little power too.
> > :
> > : Tell me if you ever see a white LED. LED's are semiconductors that emit
> > : almost monochromatic light. They would have to emit all frequencies of
> > : visible light to make white light. So, for now at least, white LEDs do
> > : not exist. Blue LEDs exist, but they are new and relatively expensive.
> > :
> > : Tobin Fricke
>
> White "LED's" exist, but they're commonly referred to as "solid state
> lamps" and i don't think they use LED technology (not sure).
>
> They use them for mercury lamp replacement etc. Check a Digi-key catalog,
> and you'll find them.
>
> -gee (gmarsh@surf.seascape.com)
With LEDs how can you tell how much power they need to run, and whether
or not they should be placed in series with a resistor so they won't
burn out?
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