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Discussion of precise time and frequency measurement

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2nd Run of TimeHats

MF
Martin Flynn
Mon, Apr 26, 2021 9:35 PM

Sign me up for two, and how do we get you the money?

Martin

On 4/26/2021 8:32 AM, John Miller via time-nuts 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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

Sign me up for two, and how do we get you the money? Martin On 4/26/2021 8:32 AM, John Miller via time-nuts 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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
LB
Lyle Bickley
Mon, Apr 26, 2021 11:00 PM

Hi John,

I'll take one :)

Cheers,
Lyle

On Mon, 26 Apr 2021 08:32:07 -0400
John Miller via time-nuts time-nuts@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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an
email to time-nuts-leave@lists.febo.com To unsubscribe, go to and follow the
instructions there.

--
73  NM6Y
Bickley Consulting West
https://bickleywest.com

"Black holes are where God is dividing by zero"

Hi John, I'll take one :) Cheers, Lyle -- On Mon, 26 Apr 2021 08:32:07 -0400 John Miller via time-nuts <time-nuts@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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-leave@lists.febo.com To unsubscribe, go to and follow the > instructions there. -- 73 NM6Y Bickley Consulting West https://bickleywest.com "Black holes are where God is dividing by zero"
MW
Matthew Wishek
Mon, Apr 26, 2021 11:06 PM

Please put me down for two.

Matthew, NB0X

On 4/26/21 5:32 AM, John Miller via time-nuts 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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

Please put me down for two. Matthew, NB0X On 4/26/21 5:32 AM, John Miller via time-nuts 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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
PA
Paul Alfille
Mon, Apr 26, 2021 11:22 PM

One for me too, please.

Paul Alfille

On Mon, Apr 26, 2021 at 5:36 PM Martin Flynn martin.flynn@compdecon.org
wrote:

Sign me up for two, and how do we get you the money?

Martin

On 4/26/2021 8:32 AM, John Miller via time-nuts 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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe

To unsubscribe, go to and follow the instructions there.

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

One for me too, please. Paul Alfille On Mon, Apr 26, 2021 at 5:36 PM Martin Flynn <martin.flynn@compdecon.org> wrote: > Sign me up for two, and how do we get you the money? > > Martin > > On 4/26/2021 8:32 AM, John Miller via time-nuts 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 > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
MD
Michael Dyer
Mon, Apr 26, 2021 11:57 PM

I am in.

--mjd
w4pwd

On Mon, Apr 26, 2021, 7:23 PM Paul Alfille paul.alfille@gmail.com wrote:

One for me too, please.

Paul Alfille

On Mon, Apr 26, 2021 at 5:36 PM Martin Flynn martin.flynn@compdecon.org
wrote:

Sign me up for two, and how do we get you the money?

Martin

On 4/26/2021 8:32 AM, John Miller via time-nuts 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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe

To unsubscribe, go to and follow the instructions there.

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe

send

an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

I am in. --mjd w4pwd On Mon, Apr 26, 2021, 7:23 PM Paul Alfille <paul.alfille@gmail.com> wrote: > One for me too, please. > > Paul Alfille > > On Mon, Apr 26, 2021 at 5:36 PM Martin Flynn <martin.flynn@compdecon.org> > wrote: > > > Sign me up for two, and how do we get you the money? > > > > Martin > > > > On 4/26/2021 8:32 AM, John Miller via time-nuts 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 > > > _______________________________________________ > > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > > send an email to time-nuts-leave@lists.febo.com > > > To unsubscribe, go to and follow the instructions there. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send > > an email to time-nuts-leave@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
SS
Scott Stansbury
Tue, Apr 27, 2021 12:15 AM

I would be interested in a single unit.

Best regards,
Scott...

On Apr 26, 2021, at 8:32 AM, John Miller via time-nuts time-nuts@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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

I would be interested in a single unit. Best regards, Scott... > On Apr 26, 2021, at 8:32 AM, John Miller via time-nuts <time-nuts@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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
AN
Art N4EZZ
Tue, Apr 27, 2021 12:53 AM

I would also be interested in purchasing one. Just need to know an exact
amount and of course when and how you need payment.

Art N4EZZ n4ezz@runbox.com
OpenPGP fingerprint E83F A68B 9E63 934A C4AC 1084 83C5 FDD3 9932 338E

“Much of the social history of the Western world over the past
three decades has involved replacing what worked with what
sounded good.”
Thomas Sowell

On 4/26/21 6:32 AM, John Miller via time-nuts 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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

I would also be interested in purchasing one. Just need to know an exact amount and of course when and how you need payment. Art N4EZZ <n4ezz@runbox.com> OpenPGP fingerprint E83F A68B 9E63 934A C4AC 1084 83C5 FDD3 9932 338E ============================= “Much of the social history of the Western world over the past three decades has involved replacing what worked with what sounded good.” Thomas Sowell On 4/26/21 6:32 AM, John Miller via time-nuts 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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. >
RN
Rene Nunez
Tue, Apr 27, 2021 1:06 AM

Hi John.

I would also like one board please.

Regards.

Renée

Sent from my iPhone

On Apr 26, 2021, at 8:15 PM, Scott Stansbury via time-nuts time-nuts@lists.febo.com wrote:

I would be interested in a single unit.

Best regards,
Scott...

On Apr 26, 2021, at 8:32 AM, John Miller via time-nuts time-nuts@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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

Hi John. I would also like one board please. Regards. Renée Sent from my iPhone > On Apr 26, 2021, at 8:15 PM, Scott Stansbury via time-nuts <time-nuts@lists.febo.com> wrote: > > I would be interested in a single unit. > > Best regards, > Scott... > >> On Apr 26, 2021, at 8:32 AM, John Miller via time-nuts <time-nuts@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 >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
MG
Michael Gindonis
Wed, Apr 28, 2021 8:20 AM

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@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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

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@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 > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
BN
Bill Notfaded
Sat, May 1, 2021 4:10 PM

I'd be interested in 2 too.

Bill

On Wed, Apr 28, 2021, 4:10 AM Michael Gindonis michael.gindonis@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@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

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe

send

an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send
an email to time-nuts-leave@lists.febo.com
To unsubscribe, go to and follow the instructions there.

I'd be interested in 2 too. Bill On Wed, Apr 28, 2021, 4:10 AM Michael Gindonis <michael.gindonis@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@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 > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send > > an email to time-nuts-leave@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there.
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