[time-nuts] Re: 2nd Run of TimeHats

[Bill Notfaded]

I'd be interested in 2 too.

Bill

On Wed, Apr 28, 2021, 4:10 AM Michael Gindonis <michael.gindonis at gmail.com>
wrote:

> I would be interested in at least one, perhaps even 2. and perhaps bare
> boards.
>
> Some things that if not already considered, could make it more interesting
> than it already is:
>
> - possibility to have a 26 pin connector instead of the 40 pin connector
> would be nice for use on Pi 1B. ( or just an option for unsoldered
> connector and one can solder it oneself.)
> - bare board.... with breakout connections for RTC and GPS modules,  a
> CR2032 holder... this could make the bare board handy as time-nut oriented
> protoboard to use with other modules.
> - extra pads opposite GPIO side of board to mount a couple extra SMA
> connectors. ( using proto space one could add one a buffered PPS out or
> other timepulse out )
> - MAX-M8W with active antenna out.
>
> I have been lurking on this list for a while. A minor upgrade to my low
> budget ntp server is long overdue. Have used Aliexpress RTC modules with
> the Pi ( with modifications to use a CR2032 safely).  I have also had a few
> Pis running with nearly 20 year old surplus fastrax GPS modules which
> include a patch antenna. Just a protoboard, jumpers, sometimes a backup
> battery and some DIP switches for setting modes. I had started a GPS board
> design in KiCAD a while ago but got bogged down when trying to layout the
> traces for the antenna connector according to the module manufacturer's
> recommendations.
>
> At the moment I just one running GPS ntp server on an old Pi 1B. The module
> I use works well most of the day. Having a patch and no external antenna
> connector the whole module must be exposed to sunlight. The module doesn't
> adjust it's TXCO offset if it doesn't have a GPS fix so it may drift a bit
> on sunny days.
>
> Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  Std
> Dev
>
> ==============================================================================
> NMEA                        8   7   224    -17.321      8.039    +55ms
> 238us
> PPS                        61  36   240     -0.000      0.003     -0ns
> 414ns
> ftp.mikes.fi               19  13  310m     -0.050      0.010  +1718us
>  64us
> ntp.netnod.se              15   9  241m     -0.046      0.044  +1596us
> 183us
> time.cloudflare.com        49  26   13h     -0.099      0.013  +2935us
> 372us
> ivanova.ganneff.de         14   9  224m     -0.045      0.025  +3083us
>  79us
>
> Best regards...
>
> ...Mike
> ---
> Michael Gindonis
>
>
>
> On Mon, Apr 26, 2021 at 7:58 PM John Miller via time-nuts <
> time-nuts at lists.febo.com> wrote:
>
> > Hello everyone,
> >
> > I’ve seen a number of messages lately that reference the TimeHat boards I
> > put together a couple of months ago, with lots of positive feedback,
> which
> > I really appreciate. The first run of boards I did sold fairly quickly,
> and
> > based on a number of emails I have gotten lately there seems to be some
> > renewed interest.
> >
> > As such, I’m going to order up another batch of PCBs and parts, but I’d
> > like to get an idea of how many I need to order to satisfy current
> demand.
> > The GPS modules come from China, so there is about a two or three week
> wait
> > them, so I want to make sure I have enough.
> >
> > For those not familiar, you can learn more about the TimeHat here:
> > https://millerjs.org/timehat
> >
> > Regards,
> > John
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