Empathy List Archives

JO

Jean-Louis Oneto

Thu, Dec 15, 2022 8:12 AM

Hi Bob,I had a similar project of driving the 24-hour mechanical Patek clock of an old HP5061 from the 1-PPS of a Raspberry Pi with a GPS module. There was several problems :1) that mechanical clock requires bipolar pulses (+/-12 V if I remember correctly) which were made by RTL or DTL logic in the 5061.2) there is no way to know the hands position, so setting up the time would be difficult. I have put this project on standby for a while, but that could be a good opportunity to revisit it. Have a great day, Jean-Louis OnetoEnvoyé de mon mobile LG------ Message d'origine------De: Bob Camp via time-nuts Date: jeu. 15 déc. 2022 06:10À: Discussion of precise time and frequency measurement;Cc: Bob Camp;Objet :[time-nuts] Crazy ClockHi

I realize that this is a bit of an odd project, but this is Time Nuts …..

I want a analog wall clock that reads out GPS time. As far as I can tell, nobody
is crazy enough to make one and sell it in the open market. If indeed there is
one out there, that
would be great. This does not have to be a project.

If it is a project, I’m lazy, I don’t want to set the thing and then count on it never
missing a beat. I want a movement that has some form of feedback. The
WWVB clocks have a movement like this. I could tear one apart and try to
reverse engineer the guts. That sounds like. a project inside a project.

Does anybody sell feedback movements like this in the hobby market? If so has
anybody used one and can vouch for it working for more than a few months?

Indeed, doing it with a display of some sort would be easier in some respects.
For now at least, I’m looking for a mechanical gizmo with hands that move.
If it reads out 12 hour time that’s ok. 24 hour time would be super cool, but
it’s not vital.

Anybody know of a source?

Thanks!

Bob

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Hi Bob,I had a similar project of driving the 24-hour mechanical Patek clock of an old HP5061 from the 1-PPS of a Raspberry Pi with a GPS module. There was several problems :1) that mechanical clock requires bipolar pulses (+/-12 V if I remember correctly) which were made by RTL or DTL logic in the 5061.2) there is no way to know the hands position, so setting up the time would be difficult. I have put this project on standby for a while, but that could be a good opportunity to revisit it. Have a great day, Jean-Louis OnetoEnvoyé de mon mobile LG------ Message d'origine------De: Bob Camp via time-nuts Date: jeu. 15 déc. 2022 06:10À: Discussion of precise time and frequency measurement;Cc: Bob Camp;Objet :[time-nuts] Crazy ClockHi I realize that this is a bit of an odd project, but this is Time Nuts ….. I want a analog wall clock that reads out GPS time. As far as I can tell, nobody is crazy enough to make one and sell it in the open market. If indeed there is one out there, that would be great. This does not have to be a project. If it is a project, I’m lazy, I don’t want to set the thing and then count on it never missing a beat. I want a movement that has some form of feedback. The WWVB clocks have a movement like this. I could tear one apart and try to reverse engineer the guts. That sounds like. a project inside a project. Does anybody sell feedback movements like this in the hobby market? If so has anybody used one and can vouch for it working for more than a few months? Indeed, doing it with a display of some sort would be easier in some respects. For now at least, I’m looking for a mechanical gizmo with hands that move. If it reads out 12 hour time that’s ok. 24 hour time would be super cool, but it’s not vital. Anybody know of a source? Thanks! Bob _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-leave@lists.febo.com

AG

Adrian Godwin

Thu, Dec 15, 2022 3:00 PM

An old synchronome slave clock also makes a nice display for something like
this. Some types require a bipolar pulse, others a single current pulse. I
once had a small circuit that charged a capacitor from an RS232 output and
discharged it into the clock when a single character was output. The tick
was then generated by a shellscript on the Unix host. This was when
peripheral outputs were only proper RS232 - there wasn't a convenient power
source like USB without a separate brick. But a USB synchronome driver
would be a very easy project.

A problem is power failures after which the time has changed but the hands
haven't. Ideally, I think you want to track the hands position in a
nonvolatile memory and aim to minimise the distance between the hands and
the actual time. In the system described above, the rate you can generate
pulses is limited by the capacitor charge time and in any case an hour's
worth of synchronome pulses in the spring would be horribly noisy. A Favag
clock as used by broadcast studios would be a better choice.

On Thu, Dec 15, 2022 at 2:51 PM Jean-Louis Oneto via time-nuts <
time-nuts@lists.febo.com> wrote:

Hi Bob,I had a similar project of driving the 24-hour mechanical Patek
clock of an old HP5061 from the 1-PPS of a Raspberry Pi with a GPS
module. There was several problems :1) that mechanical clock requires
bipolar pulses (+/-12 V if I remember correctly) which were made by RTL or
DTL logic in the 5061.2) there is no way to know the hands position, so
setting up the time would be difficult. I have put this project on standby
for a while, but that could be a good opportunity to revisit it. Have a
great day, Jean-Louis OnetoEnvoyé de mon mobile LG------ Message
d'origine------De: Bob Camp via time-nuts Date: jeu. 15 déc. 2022 06:10À:
Discussion of precise time and frequency measurement;Cc: Bob Camp;Objet
:[time-nuts] Crazy ClockHi

I realize that this is a bit of an odd project, but this is Time Nuts …..

I want a analog wall clock that reads out GPS time. As far as I can tell,
nobody
is crazy enough to make one and sell it in the open market. If indeed
there is
one out there, that
would be great. This does not have to be a project.

If it is a project, I’m lazy, I don’t want to set the thing and then count
on it never
missing a beat. I want a movement that has some form of feedback. The
WWVB clocks have a movement like this. I could tear one apart and try to
reverse engineer the guts. That sounds like. a project inside a project.

Does anybody sell feedback movements like this in the hobby market? If so
has
anybody used one and can vouch for it working for more than a few months?

Indeed, doing it with a display of some sort would be easier in some
respects.
For now at least, I’m looking for a mechanical gizmo with hands that move.
If it reads out 12 hour time that’s ok. 24 hour time would be super cool,
but
it’s not vital.

Anybody know of a source?

Thanks!

Bob

time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com

An old synchronome slave clock also makes a nice display for something like this. Some types require a bipolar pulse, others a single current pulse. I once had a small circuit that charged a capacitor from an RS232 output and discharged it into the clock when a single character was output. The tick was then generated by a shellscript on the Unix host. This was when peripheral outputs were only proper RS232 - there wasn't a convenient power source like USB without a separate brick. But a USB synchronome driver would be a very easy project. A problem is power failures after which the time has changed but the hands haven't. Ideally, I think you want to track the hands position in a nonvolatile memory and aim to minimise the distance between the hands and the actual time. In the system described above, the rate you can generate pulses is limited by the capacitor charge time and in any case an hour's worth of synchronome pulses in the spring would be horribly noisy. A Favag clock as used by broadcast studios would be a better choice. On Thu, Dec 15, 2022 at 2:51 PM Jean-Louis Oneto via time-nuts < time-nuts@lists.febo.com> wrote: > Hi Bob,I had a similar project of driving the 24-hour mechanical Patek > clock of an old HP5061 from the 1-PPS of a Raspberry Pi with a GPS > module. There was several problems :1) that mechanical clock requires > bipolar pulses (+/-12 V if I remember correctly) which were made by RTL or > DTL logic in the 5061.2) there is no way to know the hands position, so > setting up the time would be difficult. I have put this project on standby > for a while, but that could be a good opportunity to revisit it. Have a > great day, Jean-Louis OnetoEnvoyé de mon mobile LG------ Message > d'origine------De: Bob Camp via time-nuts Date: jeu. 15 déc. 2022 06:10À: > Discussion of precise time and frequency measurement;Cc: Bob Camp;Objet > :[time-nuts] Crazy ClockHi > > I realize that this is a bit of an odd project, but this is Time Nuts ….. > > I want a analog wall clock that reads out GPS time. As far as I can tell, > nobody > is crazy enough to make one and sell it in the open market. If indeed > there is > one out there, that > would be great. This does not have to be a project. > > If it is a project, I’m lazy, I don’t want to set the thing and then count > on it never > missing a beat. I want a movement that has some form of feedback. The > WWVB clocks have a movement like this. I could tear one apart and try to > reverse engineer the guts. That sounds like. a project inside a project. > > Does anybody sell feedback movements like this in the hobby market? If so > has > anybody used one and can vouch for it working for more than a few months? > > Indeed, doing it with a display of some sort would be easier in some > respects. > For now at least, I’m looking for a mechanical gizmo with hands that move. > If it reads out 12 hour time that’s ok. 24 hour time would be super cool, > but > it’s not vital. > > Anybody know of a source? > > Thanks! > > Bob > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

JF

John Franke

Thu, Dec 15, 2022 8:18 PM

A dozen years ago, I used the 1pps signal from a Jupiter GPS receiver to drive a pair of NIXIE tubes. The sixty second overflow from the NIXIE tubes advances the hands of the Standard Electric Time wall clock. I know it is not exactly you are reaching for, but it is still running, and interesting to me to see an early 1900's clock movement being driven by a 1950's NIXIE seconds counter and a 2000's GPS receiver.

John WA4WDL.

On December 15, 2022 at 10:00 AM Adrian Godwin via time-nuts time-nuts@lists.febo.com wrote:

An old synchronome slave clock also makes a nice display for something like
this. Some types require a bipolar pulse, others a single current pulse. I
once had a small circuit that charged a capacitor from an RS232 output and
discharged it into the clock when a single character was output. The tick
was then generated by a shellscript on the Unix host. This was when
peripheral outputs were only proper RS232 - there wasn't a convenient power
source like USB without a separate brick. But a USB synchronome driver
would be a very easy project.

A problem is power failures after which the time has changed but the hands
haven't. Ideally, I think you want to track the hands position in a
nonvolatile memory and aim to minimise the distance between the hands and
the actual time. In the system described above, the rate you can generate
pulses is limited by the capacitor charge time and in any case an hour's
worth of synchronome pulses in the spring would be horribly noisy. A Favag
clock as used by broadcast studios would be a better choice.

On Thu, Dec 15, 2022 at 2:51 PM Jean-Louis Oneto via time-nuts <
time-nuts@lists.febo.com> wrote:

Hi Bob,I had a similar project of driving the 24-hour mechanical Patek
clock of an old HP5061 from the 1-PPS of a Raspberry Pi with a GPS
module. There was several problems :1) that mechanical clock requires
bipolar pulses (+/-12 V if I remember correctly) which were made by RTL or
DTL logic in the 5061.2) there is no way to know the hands position, so
setting up the time would be difficult. I have put this project on standby
for a while, but that could be a good opportunity to revisit it. Have a
great day, Jean-Louis OnetoEnvoyé de mon mobile LG------ Message
d'origine------De: Bob Camp via time-nuts Date: jeu. 15 déc. 2022 06:10À:
Discussion of precise time and frequency measurement;Cc: Bob Camp;Objet
:[time-nuts] Crazy ClockHi

I realize that this is a bit of an odd project, but this is Time Nuts …..

I want a analog wall clock that reads out GPS time. As far as I can tell,
nobody
is crazy enough to make one and sell it in the open market. If indeed
there is
one out there, that
would be great. This does not have to be a project.

If it is a project, I’m lazy, I don’t want to set the thing and then count
on it never
missing a beat. I want a movement that has some form of feedback. The
WWVB clocks have a movement like this. I could tear one apart and try to
reverse engineer the guts. That sounds like. a project inside a project.

Does anybody sell feedback movements like this in the hobby market? If so
has
anybody used one and can vouch for it working for more than a few months?

Indeed, doing it with a display of some sort would be easier in some
respects.
For now at least, I’m looking for a mechanical gizmo with hands that move.
If it reads out 12 hour time that’s ok. 24 hour time would be super cool,
but
it’s not vital.

Anybody know of a source?

Thanks!

Bob

time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com

time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com

time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com

A dozen years ago, I used the 1pps signal from a Jupiter GPS receiver to drive a pair of NIXIE tubes. The sixty second overflow from the NIXIE tubes advances the hands of the Standard Electric Time wall clock. I know it is not exactly you are reaching for, but it is still running, and interesting to me to see an early 1900's clock movement being driven by a 1950's NIXIE seconds counter and a 2000's GPS receiver. John WA4WDL. > On December 15, 2022 at 10:00 AM Adrian Godwin via time-nuts <time-nuts@lists.febo.com> wrote: > > > An old synchronome slave clock also makes a nice display for something like > this. Some types require a bipolar pulse, others a single current pulse. I > once had a small circuit that charged a capacitor from an RS232 output and > discharged it into the clock when a single character was output. The tick > was then generated by a shellscript on the Unix host. This was when > peripheral outputs were only proper RS232 - there wasn't a convenient power > source like USB without a separate brick. But a USB synchronome driver > would be a very easy project. > > A problem is power failures after which the time has changed but the hands > haven't. Ideally, I think you want to track the hands position in a > nonvolatile memory and aim to minimise the distance between the hands and > the actual time. In the system described above, the rate you can generate > pulses is limited by the capacitor charge time and in any case an hour's > worth of synchronome pulses in the spring would be horribly noisy. A Favag > clock as used by broadcast studios would be a better choice. > > On Thu, Dec 15, 2022 at 2:51 PM Jean-Louis Oneto via time-nuts < > time-nuts@lists.febo.com> wrote: > > > Hi Bob,I had a similar project of driving the 24-hour mechanical Patek > > clock of an old HP5061 from the 1-PPS of a Raspberry Pi with a GPS > > module. There was several problems :1) that mechanical clock requires > > bipolar pulses (+/-12 V if I remember correctly) which were made by RTL or > > DTL logic in the 5061.2) there is no way to know the hands position, so > > setting up the time would be difficult. I have put this project on standby > > for a while, but that could be a good opportunity to revisit it. Have a > > great day, Jean-Louis OnetoEnvoyé de mon mobile LG------ Message > > d'origine------De: Bob Camp via time-nuts Date: jeu. 15 déc. 2022 06:10À: > > Discussion of precise time and frequency measurement;Cc: Bob Camp;Objet > > :[time-nuts] Crazy ClockHi > > > > I realize that this is a bit of an odd project, but this is Time Nuts ….. > > > > I want a analog wall clock that reads out GPS time. As far as I can tell, > > nobody > > is crazy enough to make one and sell it in the open market. If indeed > > there is > > one out there, that > > would be great. This does not have to be a project. > > > > If it is a project, I’m lazy, I don’t want to set the thing and then count > > on it never > > missing a beat. I want a movement that has some form of feedback. The > > WWVB clocks have a movement like this. I could tear one apart and try to > > reverse engineer the guts. That sounds like. a project inside a project. > > > > Does anybody sell feedback movements like this in the hobby market? If so > > has > > anybody used one and can vouch for it working for more than a few months? > > > > Indeed, doing it with a display of some sort would be easier in some > > respects. > > For now at least, I’m looking for a mechanical gizmo with hands that move. > > If it reads out 12 hour time that’s ok. 24 hour time would be super cool, > > but > > it’s not vital. > > > > Anybody know of a source? > > > > Thanks! > > > > Bob > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com > > To unsubscribe send an email to time-nuts-leave@lists.febo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com

time-nuts@lists.febo.com

Re: Crazy Clock