[time-nuts] Z3801 Replacement GPS Receiver Card

Chris Albertson albertson.chris at gmail.com
Sun Sep 16 16:08:08 UTC 2012


On Sat, Sep 15, 2012 at 7:04 PM, paul swed <paulswedb at gmail.com> wrote:
> As Bob mentions there may be more to it then just nailing that particular
> command.
> But worth taking a look after I deal with the wwvb psk issue. As far as the
> 5 to 3 V I would just use a 3 term reg like the cherry semi chip. But there
> are plenty of alternates. It will take 5 in and give 3.3 out at plenty of
> current.

You can power it with a regulator chip but the slightly harder part is
getting the 3V serial port level shifted to either 5V or RS232 and the
same for the PPS.  You can do it with a few transistors but maybe it
introduces error or noise if you are not carful.  I've used the 3.3
volt Oncore and really the hardest part is the new smaller connectors
that you have to find.

One good thing about the Oncore series is the quality of the
documentation.  All those commands are explained.
-- 

Chris Albertson
Redondo Beach, California



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