The best explanation possible ! Thank you Prof MAD ! I had a vague idea of how the Lavet motor (thanks for putting the real name for these single-phase steppers) works but you made it clear. Some details: 1 - The quartz deformation is GREATLY exagerated for demonstration purposes here. In real life, quartz is highly brittle and the real open end (top of the "U") oscillation is less than a micrometer. 2 - Clocks are high-pecision devices. A 10 second/month error requires precision in the order of a few parts-per-million. During manufacture, these clocks are fine-tuned with factory chosen capacitors or manually adjusted trimmer caps. 3 - The drive silicon has TWO distinct outputs that are connected to each of the motor winding ends. By alternately driving ONE output HI while keeping the other LOW, you can drive the Lavet motor with both polarities, hence simulating an AC drive. During rest time, both outputs are kept LOW. 4 - The quartz oscillator and flip-flop dividers drain extremely little power, most of the battery drain being from the Lavet motor drive. I remember in the 80's Seiko commercialised a 10-year battery life clock that ticked once every 20 seconds (my guess being a quartz at 26214.4 Hz quartz followed by a 524288 divider (19 FF's ) ). Unfortunately they seem discontinued. If anyone knows where these movements may be found, please comment below. Simply having a clock that ticks only three times per minute is a definitive plus. 5 - On the other side, sweep seconds hand movements Lavet motors run at a much higher speed. Unfortunately they drain the batteries like hell. 6 - In many quartz clocks, MUCH of the ticking noise comes from the seconds hand that vibrates at each Lavet drive. By simply pulling-out this hand, your clock will run much quieter. 7 - The minutes hand gear is friction-driven allowing the user to manually adjust the clock.
Great explanation. A couple of minor points: 1. @9:22 you say 2^15 (correct) but your graphic has 10^15 (incorrect). 2. How do they manufacture a crystal oscillator with so precise a frequency? What is the process, and what is the tolerance?
Hi mate, The oscillator is made out of quartz crystal. The frequency is just a property of that type of mineral. I'm not sure but I don't think the manufacturing process plays any role in that.
yes. Appreciate your explanation. This is because until now, i learned and went for repairs of clocks, wrist watches etc.. knowing the science of repairs. But never learned what science is behind and today on watching your video, at least learned how the various factors of movement in clock , their names etc. is obtained for which i thank you.
Good, concise animation and explanation. I've been working on building a master clock generator to pulse five wall clocks, all keeping the same time. It seems that the 'on' pulse from the dividers needs to be around 25-30ms for reliable operation. In addition to the Lavet motor arrangement, typical wall clocks also use a kind of non-reversing clutch arrangement. The idea is that when the energising pulse ends, the armature's momentum carries it beyond the magnetic equilibrium point but the clutch prevents it from returning. So, from that point the reversed pulse carries the armature forward again and it doesn't to go backwards. Marvellously simplistic and yet so effective.
Nice. Very nice. I'm always feeling bad if I point out anything that's been missed in such a beautiful video. But the feedback detail as well as how the polarity of the pulse switches is absent. Other than that it was thoroughly explained to a technologists delight.
Without watching a Clock wont complete. But most of people does n't know how clock works. Your explanation simply amazing. That to the implementaion of clock is not a easy thing now I understtood.
Actually we can also use metal (iron) tuning fork to use in a clock. Instead of hammer we can use coils to tickle it each period with magnetic field impulses. There even was such a watch, Bulova Accutron, that used the tuning fork at around 400 Hz. Instead of ticking, there was audible humming noticeable when the watch was put close to ear. And it did not have Lavet motor, movement of the tuning fork was mechanically transmitted by the system of gears, levers and ratchets to clock hands. But quartz oscillators are much more convenient, precise and cheap. Since around the same time Seiko issued Astron quartz model so tuning fork oscillators watches became horribly obsolete.
It's interesting that to make an electric analog clock run, you use a tuning fork made of the same material as some guitar pickups (piezoelectric quartz, also used in acoustic-electric guitars and a few pure electric guitars), and run the resulting signal through a few transistor octave divider circuits, also used in early electric organs to produce each octave of each of the twelve Western notes (7 white, 5 black). The result is essentially a metronome set to 60PM. It's music all the way down.
The drive silicon has TWO distinct outputs that are connected to each of the motor winding ends. By alternately driving ONE output HI while keeping the other LOW, you can drive the avet motor with both polarities. During rest time, bothoutputs are kept LOW.
One of the parts that breaks the most frequently is the little plastic axle on the rotor magnet.....usually from the clock being dropped. The rotor magnet then gets stuck to the stator metal(sits sideways a bit and can't rotate anymore)
Perfect work... Saved my life I usually do assignments the night before submission, and I had no idea this was going to be tough Searched the whole web but couldn't get what I was looking for... 😅 I was almost f*cked then I saw this video You're a true 😅 hero man 👍 TRULY PERFECT WORK
Thank you Professor MAD for the nice explanation. Please explain how does a sweep clock movement (non-ticking) work? The difference must be minor but I want to know.
My Grand Father is watch repairer, i sat many times during my childhood. But i just know, how it works, But thanks a lot to you, for clearing all doubts. thanks a lot.
very interesting video, explaining in deep the mechanism of an electric clock but avoiding entering any technical information which allows anyone to understand the main concept behind the complexity of said mechanism. I wonder if today's clocks still use quartz as the piezoelectric device.
..at 9m24sec , small error in graphics - 32,768 = 2^15 (not 10^15 as illustrated). Otherwise excellent graphics very easy to follow and understand.Thank you😊
Clock shows a battery as a power source, which is DC , while its all circuits are designed on AC, please explain how the DC current changes from DC to AC.. by installing investor...
8:30 The DC power is switched on and off to generate electrical pulses. The crystal oscillator maintains the frequency needed to pulse it at the correct frequency via a feedback loop.
The best explanation possible ! Thank you Prof MAD !
I had a vague idea of how the Lavet motor (thanks for putting the real name for these single-phase steppers) works but you made it clear.
Some details:
1 - The quartz deformation is GREATLY exagerated for demonstration purposes here. In real life, quartz is highly brittle and the real open end (top of the "U") oscillation is less than a micrometer.
2 - Clocks are high-pecision devices. A 10 second/month error requires precision in the order of a few parts-per-million. During manufacture, these clocks are fine-tuned with factory chosen capacitors or manually adjusted trimmer caps.
3 - The drive silicon has TWO distinct outputs that are connected to each of the motor winding ends. By alternately driving ONE output HI while keeping the other LOW, you can drive the Lavet motor with both polarities, hence simulating an AC drive. During rest time, both outputs are kept LOW.
4 - The quartz oscillator and flip-flop dividers drain extremely little power, most of the battery drain being from the Lavet motor drive. I remember in the 80's Seiko commercialised a 10-year battery life clock that ticked once every 20 seconds (my guess being a quartz at 26214.4 Hz quartz followed by a 524288 divider (19 FF's ) ). Unfortunately they seem discontinued. If anyone knows where these movements may be found, please comment below. Simply having a clock that ticks only three times per minute is a definitive plus.
5 - On the other side, sweep seconds hand movements Lavet motors run at a much higher speed. Unfortunately they drain the batteries like hell.
6 - In many quartz clocks, MUCH of the ticking noise comes from the seconds hand that vibrates at each Lavet drive. By simply pulling-out this hand, your clock will run much quieter.
7 - The minutes hand gear is friction-driven allowing the user to manually adjust the clock.
Great explanation. A couple of minor points:
1. @9:22 you say 2^15 (correct) but your graphic has 10^15 (incorrect).
2. How do they manufacture a crystal oscillator with so precise a frequency? What is the process, and what is the tolerance?
Hi mate,
The oscillator is made out of quartz crystal. The frequency is just a property of that type of mineral. I'm not sure but I don't think the manufacturing process plays any role in that.
Well explained sir
yes. Appreciate your explanation. This is because until now, i learned and went for repairs of
clocks, wrist watches etc.. knowing the science of repairs. But never learned what science
is behind and today on watching your video, at least learned how the various factors of
movement in clock , their names etc. is obtained for which i thank you.
Very clear excellent explanation with quality graphics and animation. Great effort. Well done.
The most important part what I learn is the rotar position c and d , that is is reason the for rotation in same direction
me too
no. Amplifier. But its working mechanism is not explained.
Well explained, thank you for all your effort you put into this video
Good, concise animation and explanation. I've been working on building a master clock generator to pulse five wall clocks, all keeping the same time. It seems that the 'on' pulse from the dividers needs to be around 25-30ms for reliable operation. In addition to the Lavet motor arrangement, typical wall clocks also use a kind of non-reversing clutch arrangement. The idea is that when the energising pulse ends, the armature's momentum carries it beyond the magnetic equilibrium point but the clutch prevents it from returning. So, from that point the reversed pulse carries the armature forward again and it doesn't to go backwards. Marvellously simplistic and yet so effective.
hello. I'm learning so much of your great and understandable teaching. i can't thank you enough
Wow very clear explanation thanks a lot and hats off to you sir
I have been looking for a frequency divider for square wave signals, and the circuit in the video is the one I have been looking for. Thank you.
I've done lots of this stuff; use a CD4060 divide by N counter chip.
enlightenment age's rose to modern blitzscaling in this video. Thank you for sharing!
Very good explaining with quality graphics 👍
Really? So what is amplifier? Can you explain it?
please, talk about Flip flop and the how the amplifier work too. Your animation are awesome.
Nice. Very nice. I'm always feeling bad if I point out anything that's been missed in such a beautiful video. But the feedback detail as well as how the polarity of the pulse switches is absent. Other than that it was thoroughly explained to a technologists delight.
Excellent excellent...........till infinity 👍👌
How great! You always stir my interest about Electrical Engineering ❤
Isn't clocks a mechanical engineering?
@@Cplusplus-Porn3 They consist of mechanical and electrical pices.
Surprisingly well explained!
Now I want to know more about how does sweep clocks work!
This is the best quartz clock explanation video I've ever seen.
Thank you.
Without watching a Clock wont complete. But most of people does n't know how clock works. Your explanation simply amazing. That to the implementaion of clock is not a easy thing now I understtood.
You are definitely a professor in animation and creating beautiful representation of such hard topics in such easy ways Respect 📈📈📈📈
Супер, наконец то я отлично понял как работают кварцевые часы, огромное спасибо.
Great video. A few typos like 10^15 instead of 2^15 and amplifire instead of amplifier.
I learns English by watching your videos.
Thanks a lot!
Actually we can also use metal (iron) tuning fork to use in a clock. Instead of hammer we can use coils to tickle it each period with magnetic field impulses. There even was such a watch, Bulova Accutron, that used the tuning fork at around 400 Hz. Instead of ticking, there was audible humming noticeable when the watch was put close to ear. And it did not have Lavet motor, movement of the tuning fork was mechanically transmitted by the system of gears, levers and ratchets to clock hands. But quartz oscillators are much more convenient, precise and cheap. Since around the same time Seiko issued Astron quartz model so tuning fork oscillators watches became horribly obsolete.
Remarkable engineering... Lavet motor
Very good info 👌
perfect video ever I saw.... I wish to keep save for life time
It's interesting that to make an electric analog clock run, you use a tuning fork made of the same material as some guitar pickups (piezoelectric quartz, also used in acoustic-electric guitars and a few pure electric guitars), and run the resulting signal through a few transistor octave divider circuits, also used in early electric organs to produce each octave of each of the twelve Western notes (7 white, 5 black). The result is essentially a metronome set to 60PM. It's music all the way down.
Sir I salute you the way you describe, you deserve something more than a like. I was just crazy to know how the Cristal works.
Well explained 😊
Really? So what is mechanism of amplifier? Is that explained?
Very nice video sir very well explained and animation clears all concept
Thank you very much for your demonstration and explanation!
Excellent explanation!
Really? So what is mechanism of amplifier? Is that explained?
Thank you for this complete, greatly detailed explanation. SUPERB!
Amazing explanation! Loved it.
Very clear. Every one can understand .
انا اشكرك وممتن لك ولشرحك ...كل ما اقوله الله يوفقك للخير يارب ويبعد عنك كل شر امين
You need to describe the conversion from a square wave pulse DC to the AC square wave pulse needed to drive the motor.
the motor driver?
@@brlinf06398Yes. The motor needs an alternating square wave to operate.
The drive silicon has TWO distinct outputs that are connected to each of the motor winding ends.
By alternately driving ONE output HI while keeping the other LOW, you can drive the avet motor with both polarities. During rest time, bothoutputs are kept LOW.
Great job sir thanks for uploading such informative knowledge
Excellent
Thank you for the detailed explanation of clock movement
Very excellent and valuable explanation.
Thank you for this elaborate and informative video.
Very well explained; very well illustrated! 10 out of 10!
Very easy to understand
Thanks
Really? So what is mechanism of amplifier? Is that explained?
Really? So what is mechanism of amplifier? Is that explained?
One of the parts that breaks the most frequently is the little plastic axle on the rotor magnet.....usually from the clock being dropped. The rotor magnet then gets stuck to the stator metal(sits sideways a bit and can't rotate anymore)
Amazing explanation sir
Really? So what is mechanism of amplifier? Is that explained?
Excellent presentation
Perfect work... Saved my life
I usually do assignments the night before submission, and I had no idea this was going to be tough
Searched the whole web but couldn't get what I was looking for... 😅 I was almost f*cked then I saw this video
You're a true 😅 hero man 👍
TRULY PERFECT WORK
Yes, really enjoyed the video ❤
Best explanation of clock ⏰ ❤
Thank you Professor MAD for the nice explanation. Please explain how does a sweep clock movement (non-ticking) work? The difference must be minor but I want to know.
A brilliant explanation, well done
My Grand Father is watch repairer, i sat many times during my childhood. But i just know, how it works, But thanks a lot to you, for clearing all doubts. thanks a lot.
I enjoyed it very much
Very good explanation thank you
great video!
Super explanation
Really? So what is mechanism of amplifier? Is that explained?
Thank you 🙏
This is really great!
Amazing work! The level of detail in your animations is incredible. Could you share what software you used to create such powerful visuals?
well explained as now i know every thing how clock works , cut i wonder where that 15 D flip-flop circuits are
Fantastic, clear explanation
great presentation, thanks for sharing
Well explained thank you
Very good. Thanks 🙏
very interesting video, explaining in deep the mechanism of an electric clock but avoiding entering any technical information which allows anyone to understand the main concept behind the complexity of said mechanism. I wonder if today's clocks still use quartz as the piezoelectric device.
Thanks for explaining so clearly
Beautifully explained
Really? So what is mechanism of amplifier? Is that explained?
..at 9m24sec , small error in graphics - 32,768 = 2^15 (not 10^15 as illustrated). Otherwise excellent graphics very easy to follow and understand.Thank you😊
3:44 very interesting questions ❤️❤️ how to ensure movement of motor ?
Thank you so much❤❤❤❤
Great presentation. What controls the duration of applied current to the oscillator and how it creates feedback for the next ON state?
Great content
excelent information
Where do you get this voice over from?
Sir we use DC cell, then how the change of pole happens. Kindly clarify.
The video is amazing sir.
very simple and nice thanks very much
very good, well explained.
Beautiful ❤❤
Nice information Sir
Clock shows a battery as a power source, which is DC , while its all circuits are designed on AC, please explain how the DC current changes from DC to AC.. by installing investor...
8:30 The DC power is switched on and off to generate electrical pulses. The crystal oscillator maintains the frequency needed to pulse it at the correct frequency via a feedback loop.
Those gearing not only counts time but the reductions also increased the motor torque output
Wow.......I need some rest to digest all this information.
Best information 😅
9:26 the graphic is wrong, it shows 10 to 32nd power, should be 2.
Sir..can you explain FM cricuit how to work
Excuse me, instead of 15 power of 2 in the video 15 power of 10 has written
Very helpfull
Thank you 🙏🙇🙏🙇
thanks
Very nice Vedio.
Great
Excellent!
Hello
Very
Very
Very
Good
Really? So what is mechanism of amplifier? Is that explained?
Good ❤❤
The graphics in "15th power of two" is wrong
Excelente!!!!!
19-09-2024 watched super explanation
Nice video! Please advise, which software do you use to make these animations for explanation? Can anyone help me? I am planning to start a YT channel
@9:29 it's 32768 = 2^15