why not use EL (electroluminescent cable)? it can be spliced like normal
wire, and i am sure it wouldnt be hard to wire up a quick circuit to
control.

Aaron

----- Original Message -----
From: "David VanHorn" <dvanhorn@CEDAR.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, December 27, 2001 4:47 PM
Subject: Re: [EE]: big led display


> >
> >The customer only wants two digits, and I guess I can put at least 5 in
> >series, so that would be 7 x 2 x 120 x 0.02 / 5 = 6.72 A. No problem for
a
> >car race environment where accu's are found all over the place. But how
> >large were your digits?
>
>
> I'm pulling a similar project, a replacement for a whelen slimlighter.
>
> The original is driven by an 8 pin PIC, but it failed after only an hour
of
> use, and is stuck on one flash pattern.  I'll use an AVR2343 of course.
>
> The slimlighter uses two banks of 4x20 orange leds.  I'm using two banks
of
> HP hyperbright 10,000 mcd lamps Eacn bank will draw about an amp with the
> LED current set to 50mA at 15V input.
>
> I don't know what the slimlighter led specs are, but it puts an impressive
> spot on the wall across the room.
>
> They go for about $0.22 each in moderate quantities.
> Doing projects like these, it's easy to see where 1000 leds could
dissapear
> real fast.
> (until you turn them on!)
>
> --
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>
>
>

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