[time-nuts] How to get PPS from ublox mini-PCI GPS to APU2 SoC serial port for ntpd

Gary E. Miller gem at rellim.com
Wed Nov 9 00:52:21 EST 2016

Yo Hal!

On Tue, 08 Nov 2016 21:13:05 -0800
Hal Murray <hmurray at megapathdsl.net> wrote:

> strykar at hotmail.com said:
> > Would this do the trick? -
> > http://www.banggood.com/8-Channel-Logic-Level-Tran
> > slator-Converter-Bi-Directional-Module-p-1023173.html   
> Not likely.
> The normal RS-232 level shifter chip includes an inverter.  (No good
> reason, just historical, but with a long history.)

Who cares if the PPS is inverted?

> I can't understand the schematic on the part Gary suggested.  I'd use 
> something like this:
>   https://www.sparkfun.com/products/11189

I admit to not spending a lot of time on my suggestion.  Yours may well
be better.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588
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