[time-nuts] M12+T Oncore
Hal Murray
hmurray at megapathdsl.net
Thu Jul 2 23:41:40 UTC 2009
> Specifically it would provide regulated 5 and 3 volts, a MAX3232 chip
> for level translation, a buffered 1PPS output, and LEDs to indicate
> power and 1PPS heartbeat. Some or all the components would be SMDs.
> This could be an assembled board or a kit.
> If this looks promising, I would be interested in what other features
> would be desirable.
How wide is the PPS? If it's tiny (10 microseconds) some serial port setups
won't catch it. If so, a one-shot pulse stretcher would be handy.
Does the PPS signal stop ticking when it runs out of satellites? If so, I
think you can use the other one-shot in the package so that the LED is on
when the PPS is ticking and blinks when the PPS is off. and is off if there
is no power).
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