Alt-BEAM Archive
Message #04357
To: beam@sgiblab.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Tue, 8 Jun 1999 19:00:39 -0700
Subject: [alt-beam] D1 is dead, long live the D2
content-type: text/plain
Hello fellow Beamers,
Only kidding about the D1 guys, but as Bob Shannon pointed out : what's so
good about that design anyway?
So as a start to retiring the venerable D1 Solar Engine, here is D2, a
replacement for both the D1 SE and the LED Bicore combined with a very nice
added feature: Load voltage regulation for 12 constant brightness LEDs
during the discharge. Note that the 14 pin 74HC14 drives 12 LEDs instead of
the 20 pin 74HC240 LED Bicore which only drives 8 LEDs. I'll do a little
write up of the D2 theory and will post it soon.
enjoy
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
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