Some tech stuff...
'On Wed, 24 Jun 1998 23:25:31, Dr John Stockton <jrs@merlyn.demon.co.uk> wrote:
> JRS: In article <7kepWhCNP4qd-pn2-Njn8CuIHdsE4@localhost> of Wed, 24
> Jun 1998 12:34:23 in comp.software.year-2000, cory hamasaki
> <kiyoinc@ibm.XOUT.net> wrote:>
> >cory hamasaki 555 days A 555 is an MSI TTL clock chip!>
> The "TTL" is a bit questionable, though it can be used with : but it is
> a red herring, as it is merely the heart of a flexible oscillator, and
> has no significant storage capacity (one bit, I think) and certainly has
> nothing to do, of itself, with the date. I liked the C555 (CMOS).> > --
Dang it, John, I'm having another senior moment. It's gotta be SSI...
as I recall it's not an oscillator in the Copitts, Hartley sense but
some NAND gates in a configuration called a "timer" and it puts out TTL
level square waves not nice smooth sine waves. You wouldn't catch
4ZHG, cans on his head, bzzzzoup, a spark climbs a Jacobs ladder,
his Bencher hooked up to an 8051 mode-2 IAMBIC keyer, Frank reaches out
a tanned hand and cranks the helical gear driven Sprague capacitor, the
micromicrofarads ramp the 5 mHz local oscillator up, up, up the 555
wheezes to keep up.... nope, the 555 is a timer. You'd use it to blink
LEDs or beep in a morse code practice set.
Bringing this all around to Y2K. I'm afraid some of the "embedded's
have clocks and they're everywhere" talk is based upon devices like
555's. Which are timers, not clocks.
I wonder if 555's have a place in the post Y2K survival set. You can do
a lot with them. cory hamasaki 555 days Edwards: 4 Eastabrook: 3
__
'Subject: 555 days was: Egan does about face!
From: kiyoinc@ibm.XOUT.net (cory hamasaki)Date: 1998/06/25
Message-ID: <7kepWhCNP4qd-pn2-dmGVS01MFlJn@localhost>
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