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

Chris Albertson albertson.chris at gmail.com
Wed Nov 9 01:40:04 EST 2016

The MAX3223 chip does exactly what you need.  It converts 3.3 volt serial
to RS232 levels.

You can buy just the chip and add a few passives to a perf board and make
what you need or buy a little PCB with the parts already soldered down like

It is actually cheaper to buy the little PCB then to buy the parts to make

On Tue, Nov 8, 2016 at 7:23 PM, 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.
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Chris Albertson
Redondo Beach, California

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