On Fri, Jun 18, 2004 at 08:13:01PM +0100, Tony Duell wrote:
> Let me see if I understand this. You have a digital value (system usage),
> on a digitial machine (the linux box). You convert it to analogue. You
> then re-convert it to digital with a very low-res ADC (the LM3914 (I
> guess) bargraph chip. Why not just output a suitable value on the
> parallel port (which has 12 output lines IIRC) to directly drive the LEDs
> (the 3914 drives 10 LEDs at most).
It's to drive _2 sets_ of 15 or 16 LEDs from _8 bits_, since the BeBox
is a dual-processor box.
And, yes, the LM3914 sounds about right.
-ethan
--
Ethan Dicks, A-130-S Current South Pole Weather at 19-Jun-2004 01:40 Z
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Ethan.Dicks_at_amanda.spole.gov http://penguincentral.com/penguincentral.html
Received on Fri Jun 18 2004 - 20:50:25 BST