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Arduino Pendulum Clock Design - Comments Welcome

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John Haine22/01/2021 10:09:34
3663 forum posts
206 photos

Don't be too discouraged Dave! Your device is the first real bit of new thinking in pendulum clocks for quite a while. One thing you could consider, given the sensitivity to vibration, is to have more than one pendulum, coupled together. Swinging in antiphase, they can be immune (long term) to horizontal shifts of the clock in the plane of the pendulum. There's a clock at the BHI HQ at Upton Hall that has 3 pendulums set at 120 degrees, all swinging inwards and outwards in phase - that sort of configuration could work well with your tripod and tank. The BHI version has a complicated mechanical escapement, it could be easier using EM impulsing.

Another point about using coupled pendulums is that, designed right, the CoG of the clock doesn't move with the pendulums, so much less energy is lost to the support. To work best the coupling needs to be tight, which implies a less rigid frame. It's critical that the pendulums have the same period exactly and the same mass, otherwise the amplitudes become unbalanced.

Meunier22/01/2021 14:28:19
408 forum posts
5 photos

How can I insert a link to an mp.4 file showing further pendulum options for SoD? (humorous )

DaveD

Michael Gilligan22/01/2021 14:38:27
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17332 forum posts
787 photos
Posted by Meunier on 22/01/2021 14:28:19:

How can I insert a link to an mp.4 file showing further pendulum options for SoD? (humorous )

DaveD

.

Do you have a Dropbox account, Dave ?

... It’s easy to provide a ‘read only’ link to a folder there

MichaelG.

Meunier22/01/2021 16:01:22
408 forum posts
5 photos

Sorry, no Dropbox acct Michael. Perhaps I should investigate.

Also, thank you for the continuation link on the 'bridge' story, have not had time to
pursue the link yet but look forward to following through.
DaveD

Michael Gilligan22/01/2021 16:20:37
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17332 forum posts
787 photos
Posted by Meunier on 22/01/2021 16:01:22:

Sorry, no Dropbox acct Michael. Perhaps I should investigate.

.

.

Start here, Dave **LINK**

https://www.dropbox.com/en_GB/basic

... but you may need the French localisation

MichaelG.

John Haine22/01/2021 16:28:39
3663 forum posts
206 photos

Doesn't have to be Dropbox, can share files through Google Drive for example.

Michael Gilligan22/01/2021 16:52:53
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17332 forum posts
787 photos
Posted by John Haine on 22/01/2021 16:28:39:

Doesn't have to be Dropbox, can share files through Google Drive for example.

.

True ...

Meunier22/01/2021 17:37:48
408 forum posts
5 photos

Dropbox link attempt

 

https://www.dropbox.com/s/1t8mqdgl84izll0/Le%20Maitre%20des%20Horloges-Genial1.mp4?dl=0

DaveD

 

Supper calls, check back later !

Edited By Meunier on 22/01/2021 17:39:36

Michael Gilligan22/01/2021 18:25:37
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17332 forum posts
787 photos

It works for me, Dave

... absolutely superb star

MichaelG.

Meunier22/01/2021 19:00:39
408 forum posts
5 photos
Posted by Michael Gilligan on 22/01/2021 18:25:37:

It works for me, Dave

... absolutely superb star

MichaelG.

Now, how to make the link a 'linky' rather than a url. Thanks for the incentive Michael, now i will be able to add some bird photos, probably in tea-room, to avoid off-topic accusations. Japanese nightingales to be precise.
DaveD

Michael Gilligan22/01/2021 20:15:41
avatar
17332 forum posts
787 photos

Click this icon [affectionately known as the bubblecar, although of course it’s not]

... and follow your nose, Dave

bubblecar.jpg

**LINK**

https://www.dropbox.com/s/1t8mqdgl84izll0/Le%20Maitre%20des%20Horloges-Genial1.mp4?dl=0

MichaelG.

Meunier22/01/2021 20:31:10
408 forum posts
5 photos

Thanks again Michael, every day is a good day when you learn/achieve something new !

**Link**

DaveD

I only hope that after all the effort SOD/Dave and JohnH have a chuckle

Edited By Meunier on 22/01/2021 20:32:39

SillyOldDuffer22/01/2021 20:41:57
Moderator
6878 forum posts
1539 photos
Posted by Meunier on 22/01/2021 20:31:10:

...

**Link**

DaveD

I only hope that after all the effort SOD/Dave and JohnH have a chuckle

Certainly did! Excellent, thanks.

laugh

Dave

Meunier22/01/2021 20:44:42
408 forum posts
5 photos

yes

DaveD

duncan webster22/01/2021 21:25:54
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3069 forum posts
40 photos

The man's got too much time on his hands.

I'll get my coat

SillyOldDuffer28/02/2021 10:04:48
Moderator
6878 forum posts
1539 photos

Arghh!

Last month I decided to leave the clock running for 5 weeks to see how it behaved on a long run. Just checked and it stopped 3 weeks ago. Only then did I remember having to reset the cooker clock due to a power cut.

The clock flashes an LED to show it's running and it looked OK from across the room. Wrong LED! The Pi flashes a LED to show network activity and I was watching that. Should have gone to Specsavers!

Dave

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