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echo: electronics
to: MIKE ROSS
from: Jasen Betts
date: 2002-12-17 18:09:48
subject: digital clocks

Hi MIKE.

 MR> Maybe not. I'd make the individual clocks dumb and not much more
 MR> than a simple display. A central clock would only send digit data
 MR> serially to all the displays daisy-chained down the wire. No need
 MR> to set anything and only 1 wire plus ground is all that would be
 MR> required. I would even try to integrated it all with the fire
 MR> alarm system and intercom to save on copper. I think they do
 MR> something like this in subways.

That's the way to do it, IIRC there was an I2C demonstrator like
that, display at one end of the wire clock circuit at the other.

build a few more displays, and you have a masterclock system :)

 -=> Bye <=-

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