It´s just for my collection of clocks with vintage display technology. Most of them are stored in a cabinet and I get one out from time to time for my desk and change that every few months. You can see many of them in the playlist "Vintage Display Technology" on my channel
@@KainkaLabs Awesome that a person like you who are concerned with old display tech should come across a haul of theese Nimo tubes. It would be wrong if those tubes had come into the hands of someone who forexsample would speculate in their price. And sell one and one : | Now we all get to see them operate. Super.
HI ALL, I do not understand why I get the following message when I try to get in to the forum: Your account has been excluded. Exclusion reason: Spam exclusion is lifted: Never. I ALSO GET THE FOLLOWING: Sorry, but you are excluded from the forum. You may not be able to write posts, read topics, or enter the forum. If you have any further questions, please contact the forum administrator. HOW DO I CONTACT THE FORUM ADMINISTRATOR IF I CAN NOT ACCESS THE FORUM.
We get so many spammers in the forum that I delete a new account if there is no message posted in the first few hours. So just create a new account and post something so that you are identified as a legitimate user.
2 months later... So what's happening? I believe I read a post on NeoNixie you're still looking for a 6th tube? Was just wondering why since you bought 10.
Yes, and I did this on purpose because I didn´t want a microcontroller with an RTC chip but "pure" digital logic to comply with the age of the tubes (although CMOS wasn´t available back then). And on the long term getting the clock-signal derived from main frequency is very accurate because the number of cycles is controlled and adjusted in the European electricity grid. Mains-controlled clocks were even quite accurate on short terms until about the end of the 1990s. The clocks rarely lost or gained more than a minute. Due to the large increase of renewable energy with their large fluctuating power the mains-frequency mains-controlled clocks sometimes loose or gain up to 10 minutes now althogh this has become better again in the last 2 years. There were many complaints to the electricity companies when people came late to their work because their alarm clocks were running slow :-) Anyway the clock is not intended wo give super-accurate time but only to be a pleasure for me to look at or to show them at hacker-meetings etc. I usually get out one of my home-built "Vintage Display Technology Clocks" for a few months to my office-room or to my lab and then change to another one for not to wear out precious tubes with limited life-time.
@@KainkaLabs that's neat. i hadn't heard of that, (except after making this comment i did see another video on using mains power for timekeeping, on the franlab channel) i suppose there's no reason it couldnt be plenty accurate as long as the frequency remains stable. i am jealous of you europeans, 50 cycle hum is orders of magnitude more pleasant to have as an everpresent hum, 60hz wears on my soul i saw a video where someone did a frequency count on the timing pulse for a quartz clock, it is supposed to be 32768hz but upon testing it was fractions of a hz off. now im thinking if it's possible to tune one's own quartz crystal to be an exact integer frequency instead of being off by some degree of tolerance. it seems if you could manage an exactly tuned crystal you would have a very accurate timekeeping device!
"Normal" quartzes for watches have an accuracy of 10...50 ppm which gives an error between 1 and 5 seconds per day. So this in fact gives you "a fraction of a Hz off" when you measure the buffered output of the quartz-oscillator at 32.768 kHz. If you measure directly at the quartz pins (without a buffer in between) you of course introduce a significant change in the quartz frequency simply by adding the parallel capacitance of the probe :-) Quartz oscillators can be stable up to 10^-8 (10ppb), if they are thermally stabilized in a so called "oven-controlled crystall oscillator" (OCXO). There is also the also the extremely accurate RTC-chip from Maxim which gives an accuracy of around a few seconds per year (!) out of the box without any adjustments. I have a video on my channel about a rubidium-controlled frequency generator with which i checked the quartz accuracy in the OCXO of my frequency counter.
@@KainkaLabs do you have the link to that video? what could you use to check the frequency of the OCXO? it seems to me a digital oscilloscope would have it's own clock which could be subject to it's own clock's margin of error. would this be resolved by having a much faster clock?
The video is in my playlist "Every maker should have...".Search for a video titled "Every make should have a rubidium frequency standard" You can buy OCXOs and TCXOs which are already adjusted to their specified tolerance. Otherwise it would not make much sense :-). The quartzes used in DSO also have tolerances of around in the range of 5...50 ppm. Most of them have a BNC-jack for an external 10 MHz frequency standard to give more accurate measurements.
Excited to see the next update! Would love to build my own Nimo tube clock.
Wow those tubes must've been such a lucky find
Thanks for doing the updates.
Really nice to see the progress
Thanks for showing us...great too see and awaiting next upload...
I wish I had one of these displays they are so rare
Very fascinating. I appreciate your help. I tested the circuit and I can say that is working pretty well. Thanks
Very cool! Nicely done Rodger!
Where will you find time valuable enough to keep with such an expensive clock.
It´s just for my collection of clocks with vintage display technology. Most of them are stored in a cabinet and I get one out from time to time for my desk and change that every few months. You can see many of them in the playlist "Vintage Display Technology" on my channel
@@KainkaLabs
Awesome that a person like you who are concerned with old display tech should come across a haul of theese Nimo tubes. It would be wrong if those tubes had come into the hands of someone who forexsample would speculate in their price. And sell one and one : |
Now we all get to see them operate. Super.
The Digit ''0'' and ''5'' have a lot of Ghosting on these tubes..
HI ALL, I do not understand why I get the following message when I try to get in to the forum:
Your account has been excluded.
Exclusion reason: Spam exclusion is lifted: Never. I ALSO GET THE FOLLOWING:
Sorry, but you are excluded from the forum. You may not be able to write posts, read topics, or enter the forum. If you have any further questions, please contact the forum administrator.
HOW DO I CONTACT THE FORUM ADMINISTRATOR IF I CAN NOT ACCESS THE FORUM.
We get so many spammers in the forum that I delete a new account if there is no message posted in the first few hours. So just create a new account and post something so that you are identified as a legitimate user.
2 months later...
So what's happening?
I believe I read a post on NeoNixie you're still looking for a 6th tube?
Was just wondering why since you bought 10.
I have enoigh tubes, but no time ATM. Perhaps during X-mas holidays or the next lockdown here in Germany :-(
@@humesjason
What?
it is dividing from mains frequency? that isn't a very accurate clock, right?
Yes, and I did this on purpose because I didn´t want a microcontroller with an RTC chip but "pure" digital logic to comply with the age of the tubes (although CMOS wasn´t available back then). And on the long term getting the clock-signal derived from main frequency is very accurate because the number of cycles is controlled and adjusted in the European electricity grid. Mains-controlled clocks were even quite accurate on short terms until about the end of the 1990s. The clocks rarely lost or gained more than a minute. Due to the large increase of renewable energy with their large fluctuating power the mains-frequency mains-controlled clocks sometimes loose or gain up to 10 minutes now althogh this has become better again in the last 2 years. There were many complaints to the electricity companies when people came late to their work because their alarm clocks were running slow :-)
Anyway the clock is not intended wo give super-accurate time but only to be a pleasure for me to look at or to show them at hacker-meetings etc.
I usually get out one of my home-built "Vintage Display Technology Clocks" for a few months to my office-room or to my lab and then change to another one for not to wear out precious tubes with limited life-time.
@@KainkaLabs that's neat. i hadn't heard of that, (except after making this comment i did see another video on using mains power for timekeeping, on the franlab channel) i suppose there's no reason it couldnt be plenty accurate as long as the frequency remains stable. i am jealous of you europeans, 50 cycle hum is orders of magnitude more pleasant to have as an everpresent hum, 60hz wears on my soul
i saw a video where someone did a frequency count on the timing pulse for a quartz clock, it is supposed to be 32768hz but upon testing it was fractions of a hz off. now im thinking if it's possible to tune one's own quartz crystal to be an exact integer frequency instead of being off by some degree of tolerance. it seems if you could manage an exactly tuned crystal you would have a very accurate timekeeping device!
"Normal" quartzes for watches have an accuracy of 10...50 ppm which gives an error between 1 and 5 seconds per day. So this in fact gives you "a fraction of a Hz off" when you measure the buffered output of the quartz-oscillator at 32.768 kHz. If you measure directly at the quartz pins (without a buffer in between) you of course introduce a significant change in the quartz frequency simply by adding the parallel capacitance of the probe :-)
Quartz oscillators can be stable up to 10^-8 (10ppb), if they are thermally stabilized in a so called "oven-controlled crystall oscillator" (OCXO). There is also the also the extremely accurate RTC-chip from Maxim which gives an accuracy of around a few seconds per year (!) out of the box without any adjustments. I have a video on my channel about a rubidium-controlled frequency generator with which i checked the quartz accuracy in the OCXO of my frequency counter.
@@KainkaLabs do you have the link to that video? what could you use to check the frequency of the OCXO? it seems to me a digital oscilloscope would have it's own clock which could be subject to it's own clock's margin of error. would this be resolved by having a much faster clock?
The video is in my playlist "Every maker should have...".Search for a video titled "Every make should have a rubidium frequency standard"
You can buy OCXOs and TCXOs which are already adjusted to their specified tolerance. Otherwise it would not make much sense :-). The quartzes used in DSO also have tolerances of around in the range of 5...50 ppm. Most of them have a BNC-jack for an external 10 MHz frequency standard to give more accurate measurements.
No more updates?
I don´t have time ATM to continue work on the clock.
Came from eevblog !...gonna check your vids...cheers.