[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
Tue Nov 8 22:42:16 EST 2016


On Wed, 9 Nov 2016 03:23:59 +0000
"STR ." <strykar at hotmail.com> wrote:

> >The signals on the DB9 connector are at RS232 levels, your GPS
> >module is likely 3V3 CMOS, you will need to make a level translator
> >if you wish to use a standard PC >RS232 serial port.  
> Would this do the trick? -
> http://www.banggood.com/8-Channel-Logic-Level-Translator-Converter-Bi-Directional-Module-p-1023173.html
> I'll get some 3.3 and 5 V power supplies too.

Marginal.  Remember RS-232 is +/- 12V.  Your part only gets you to 5V.

Some RS-232 ports will work with 5V, some not, and others will be flakey.

You want something like this:


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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