One of the most underrated videos have seen Very happy somebody is paying attention to core electronics, not only high scale integration ...! I can code in binary (I learned assembler in binary, no compilators at that time ] and people look at me like I were a Martian! Your custom made 7seg are just incredible.! Some Very nice and clever solutions. A high dose of ingenuity and common sense . This video worth to watch it several times. By the way, I saw a "compact" commercial russian clock from 70s donde this way and had like 7 boatds heavy populated with components. Used a HV integrated display.
Using the grid 50Hz instead of a 32768Hz oscillator and divider is cheating 😆 now seriously, I loved your dedication, and it is so refreshing to see people truly enjoying what they do 👍
This was made in the good old days too. So it is historicaly correct cheating. 😅 The 50 Hz frequency is extremely precise because it is strictly regulated by the energy companies.
I’m slowly playing along. Sourcing second hand parts takes/makes time. I’m building only from harvesting parts. Your right. It’s an art. Love your content, explanations, and clock. God Bless.
I am quite struck by the elegance of your design. Use of the staircase to divide and the ring counters to count and display is clever and simple and efficient - a fine example of how design can go beyond mere function and become a thing of beauty. Your students are lucky to have you. Thanks for taking the time to make this video!
I love electronics in theory more these days due to the smaller packaging and lack of motivation to build since anyone with youtube and a site to order modules and sensors can repair and build simple but daily money makers for technicians. As I watch your videos you motivate my interest in getting back to the bench. Through simple explanations and tips I actually learned alot of my failures alot faster than I was learning in school. Thank u and if nothing else u inspire me so please keep them coming. I would like to see some videos on different motor controllers of different motors in small packaging would be a great project to do with my son whom is currently 14 and is learning and loving. Thank u
Thank you for the video. I am a Korean teenager and I like analog circuits made of transistors and diodes only. This video stimulates my desire to produce, and I'll make this watch.
Beautiful clock. I think I'd have to watch this a few times to wrap my head around the whole thing, but it's pretty incredible what you all did with the 50hz signal coming out of the wall!
The direct use of mains frequency is an old classic. What is more weird though is the analog integrators, which can create untraceable problems for no apparent reason...
you are a fantastic teacher and I think you should do series of videos starting from the basic power supply till the final 7 segment display like in 10 videos and I am sure with the way you explain stuff you can generate some funds for future projects for your students, lots of people thirsty for knowledge and how things work. Regards
Very nice build. A little more voltage and a Nixie display could be added. I do a lot of non micro controller digital clock builds using old tech. An all transistor build is on the list at some point. That should get me more familiar with transistor circuits. This description will also help with more studying. Thanks.
Really cool, I lerned some more about analog circuits. But two questions: 1) How do you make sure that one and only one stage in the ringcounter is on during start? 2) Why do you use a step-up converter for the LED voltage instead of simply using the 220V?
When the power first comes up the counters typically start in an illegal state, with more than one active stage - the first minute's pulse that comes in gets it going correctly. Using the 220 mains without some form of isolation would be too dangerous for my novice students, don't want to kill them before they learn something! Some of the ideas we toyed with: Hang another 12V transformer off the secondary in reverse? - Cockcroft Walton voltage multiplier? Flyback converter?
One thing coming to mind is: How difficult would it be to pwm the 100V in order to adjust the displays' brightness? I am thinking of a sawtooth generator feeding an adjustable schmitt trigger which in turn switches the 100V on and off with a frequency above visual perception. Or derive the pwm from the AC sync line in some way? Given the low power consumption of the LED Display a single transistor should be able to handle the load of the 100V line easily. Or do I miss something?
I've been a technician since the mid 70s. I presently work for a military contractor where I test and troubleshoot a lot of legacy circuitry. I will tell you one thing, the youth of today (who has gotten an education in electronics) knows little to nothing about analog. That's because their education concentrated on digital electronics. I'm just flabbergasted over how much they don't know. You appear to be an excellent teacher, and if I had the power I'd send them your way.
Nice project, just one question.... What initializes the ring counters to only have one output true? Its clear that once initalized the ring counter will work as described, but It seems that multiple bits could be set, or no bits could be set... IE how do you initialize so only one bit is set?
They do start in an illegal state. The VREF signal comes up slowly, this tends to activate more than one stage, the first minute's pulse sorts it all out.
This was a great video, really enjoyed the deep understanding of a basic clock that we would all take for granted otherwise. And the digits! They’re excellent. Hats off to great build
Excellent project and really good video documenting the design and build of this beauty! I really enjoyed watching every minute, and 10’s of minutes :) What level of electronics is this class? What country is your school in? The students are very lucky to have you.
I have never seen such a switching concept with a transistor, just a glow lamp. Very interesting. I'm planning my relay watch now. Another question is the conversion from 50Hz to 1HZ. Very noisy. :) Good luck with your other work.
The divider output is very clean and stable. The only issue is getting it set exactly right so temperature changes dont cause the divide ratio to shift
Thanks for the video, this was great. I was curious what this would have costed in today's money. Given a single transistor cost at $8.00 equivalent with ~79 transistors would have been ~$630 today! Haha, I wonder how many clocks like this if any were made back then?
In 1960 I think clocks would have still been electromechanical (eg flap clocks) or just straight up mechanical (ie with a spring to wind or a pendulum and weights).
strange.I tried this very same project with IC counters about 5 years ago but it didn't work as expected.and yet I couldn't get to know what went wrong.
I had trouble trying to reset the tens minutes counter at the 7th count (before the display reads 6)using AND and NOT gates(discrete components gates) with the inputs from the counters segments output. NOT ( B segment ) AND ( E segment ) =1 ,this is true only at the 7th count for all 0 =< x =< 6. How do you like that?do you think it 's OK
You know ..? I am kind of rusty about basic analogic design. Now we even use an arduino to turn on a lamp ..! I will replicate some modules in my lab to refresh the ideas .!
100V boost converter : overkill ! Use diode-capacitor ladders to multiply the voltage from the transformer :-) This is particularly adapted to the low power draw of the LED.
@@leosbagoftricks3732 Keep me informed !! Do you use Falstad's simulator to prototype your circuits with the students ? Did you see tinyurl.com/vayr4ab ? I am working on "neovintage" clock circuits that use actual 60's era parts, with no silicon (germanium, eventually selenium) and I'm looking for circuits that use only one kind of transistor, not complementary pairs (Germanium PNPs are even harder to source). I would be happy to help with your next crazy projects, look at my videos and my HaD profile :-) hackaday.io/whygee
10:00 My first thought was you were gonna go _super_ analog -- using the phase differences between an oscillator's 3rd or 5th harmonics and the input signal to govern the lower-frequency oscillator -- with three /5 stages, a /3 stage, and then just three flip-flop stages for the /2. Fortunately not, since that would be quite insane to attempt with such low frequency signals lmao.
Using LEDs, especially the very modern white ones instead of rows of incandescent bulbs seemed an out of bounds choice given the stated, albeit arbitrary, technology limit. Why no colon in the display and no AM/PM indicator or better yet, a 24-hour format? How about a laser cut diffusing lens for each display element? These are really just suggestions for the next iteration. I remember taking apart basic digital alarm clocks and finding they all used a single 0.6" wide DIP.
9:40 two transistors per flip flop? How is that possible? An AND gate takes two transistors, a NOR gate takes 3 transistors and the Inverter takes 1 so that a D type Flip Flop takes two AND gates, two NOR gates (S-R latch) and a Inverter for a total of 11 transistors.
One strange question please ! How all this can work , along DC Power supply, ... Because all those Capacitors are not supposed to do anything in DC Circuits... ... 🤣😬🤣😬🤣... I am just a total newcomer into Electronics, but my understanding so far is that capacitors are Reacting only in RF or... AC environment , but in a DC they act Like switches in OFF position . 🤐🤐🤐🤐🤔🤪😬😱
@@leofernekes343 still don't get it ...but you gave me a Hint ...to dig deeper into the Rabbit hole. ... At the moment I am at 1800's level of understanding .... ... ... Wandering around with B. Franklin and looking into a dark cloudy Sky!!! ☂️⛈️🌩️🌩️🌩️🌩️... Thank you !!!
One of the most underrated videos have seen
Very happy somebody is paying attention to core electronics, not only high scale integration ...!
I can code in binary (I learned assembler in binary, no compilators at that time ] and people look at me like I were a Martian!
Your custom made 7seg are just incredible.!
Some Very nice and clever solutions. A high dose of ingenuity and common sense .
This video worth to watch it several times.
By the way, I saw a "compact" commercial russian clock from 70s donde this way and had like 7 boatds heavy populated with components. Used a HV integrated display.
Using the grid 50Hz instead of a 32768Hz oscillator and divider is cheating 😆 now seriously, I loved your dedication, and it is so refreshing to see people truly enjoying what they do 👍
This was made in the good old days too. So it is historicaly correct cheating. 😅 The 50 Hz frequency is extremely precise because it is strictly regulated by the energy companies.
I’m slowly playing along. Sourcing second hand parts takes/makes time. I’m building only from harvesting parts. Your right. It’s an art.
Love your content, explanations, and clock.
God Bless.
I am quite struck by the elegance of your design. Use of the staircase to divide and the ring counters to count and display is clever and simple and efficient - a fine example of how design can go beyond mere function and become a thing of beauty. Your students are lucky to have you. Thanks for taking the time to make this video!
This is increible, amazing job.
I love electronics in theory more these days due to the smaller packaging and lack of motivation to build since anyone with youtube and a site to order modules and sensors can repair and build simple but daily money makers for technicians. As I watch your videos you motivate my interest in getting back to the bench. Through simple explanations and tips I actually learned alot of my failures alot faster than I was learning in school. Thank u and if nothing else u inspire me so please keep them coming. I would like to see some videos on different motor controllers of different motors in small packaging would be a great project to do with my son whom is currently 14 and is learning and loving. Thank u
Thank you for the video.
I am a Korean teenager and I like analog circuits made of transistors and diodes only.
This video stimulates my desire to produce, and I'll make this watch.
Please build one and show us your results!
The guitar riff at the beginning made my day! The clock info was a bonus. Thanks Leo!
MASTERY!!! I prostrate myself in adoration of your mad Analog Skills!
Seriously awesome.
Beautiful clock. I think I'd have to watch this a few times to wrap my head around the whole thing, but it's pretty incredible what you all did with the 50hz signal coming out of the wall!
The direct use of mains frequency is an old classic. What is more weird though is the analog integrators, which can create untraceable problems for no apparent reason...
You're amazing! I haven't been this excited for an electronics youtube channel in a long time. Keep up the amazing work man!
I really like how you went through all of the details. I learned a lot.
Super clever solution with the divider circuit - straight from the bag of tricks!
I LOVE IT IM JEALOUS LOL YOU DESERVE FULL CREDIT FOR A WONDERFULL EDUCATIONAL DESCRETE PIECE THANKYOU FOR THIE AMAZING PIECE OF ART
Darn! I learned something! Thanks. Such an interesting project. I think I'm gonna dive in on this one.
you are a fantastic teacher and I think you should do series of videos starting from the basic power supply till the final 7 segment display like in 10 videos and I am sure with the way you explain stuff you can generate some funds for future projects for your students, lots of people thirsty for knowledge and how things work.
Regards
Also add a semi colon with 2 yellow leds to separate the mins for hrs and it's cool to see the pulsing heart of you hard work
Very nice build. A little more voltage and a Nixie display could be added. I do a lot of non micro controller digital clock builds using old tech. An all transistor build is on the list at some point. That should get me more familiar with transistor circuits. This description will also help with more studying. Thanks.
How do you make to show the time between 20:00 and 23:59, as there is no sign for "2" on the first digit...?
It's not in 24 hour format- simpler that way
@@leofernekes343 oh but then you have time only for half of the day?
@@alekcxjo It just repeats, 12 X 2 = 24.
@@leosbagoftricks3732 sounds strange but OK
Great video, I wondered How is the state of the ring counters initialized?
It's clever. I like it. Real 1960's technology (and ingenuity)!
Really cool, I lerned some more about analog circuits. But two questions: 1) How do you make sure that one and only one stage in the ringcounter is on during start? 2) Why do you use a step-up converter for the LED voltage instead of simply using the 220V?
When the power first comes up the counters typically start in an illegal state, with more than one active stage - the first minute's pulse that comes in gets it going correctly.
Using the 220 mains without some form of isolation would be too dangerous for my novice students, don't want to kill them before they learn something! Some of the ideas we toyed with: Hang another 12V transformer off the secondary in reverse? - Cockcroft Walton voltage multiplier? Flyback converter?
@@leosbagoftricks3732 Okay to kill them after they've learned something!? 😉
I really want to build one of these. Awesome project. I don't see any specs for transformer T1. Is it homemade?
Very nice design and implementation. I hope your students enjoyed the journey! The step generator looks to have potential for a curve tracer.
That red circle is genius. I'm stealing that! Thanks for making these cool videos!
good work guys greetings from indonesia...
Beautiful build. I really like the look of the completed clock :)
The best video of my month!
Great video and explanation of each of the modules. Have you had a chance to post the schematics anywhere yet?
Check the link in the description for schematic download
Awesome Job!!! You are a really good Teacher! congratulation for the result archived, for you, and your students.
Could you have left off the inverter by including the 12-volt step down transformer in the design and then getting your high voltage from mains?
Unless it's isolated, this would be very unsafe for the poor students.
It’s just a piece of art 😍
your schematic website not working ?
Fixed.
One thing coming to mind is: How difficult would it be to pwm the 100V in order to adjust the displays' brightness? I am thinking of a sawtooth generator feeding an adjustable schmitt trigger which in turn switches the 100V on and off with a frequency above visual perception. Or derive the pwm from the AC sync line in some way? Given the low power consumption of the LED Display a single transistor should be able to handle the load of the 100V line easily. Or do I miss something?
Fantastic! Really enjoyed the detailed explanation.
I've been a technician since the mid 70s. I presently work for a military contractor where I test and troubleshoot a lot of legacy circuitry. I will tell you one thing, the youth of today (who has gotten an education in electronics) knows little to nothing about analog. That's because their education concentrated on digital electronics. I'm just flabbergasted over how much they don't know. You appear to be an excellent teacher, and if I had the power I'd send them your way.
Yes, it's as if "Analog is obsolete" is what they believe. That's why we see so many "Build a simple 4000 W inverter" videos on TH-cam now haha.
I love it.
How I would have liked to have you as teacher !
This is an epic project and a wonderful walkthrough. How'd you end up teaching EE in Thailand?
Very nice transister clock🙏🙏♥️
Nice project, just one question....
What initializes the ring counters to only have one output true?
Its clear that once initalized the ring counter will work as described, but
It seems that multiple bits could be set, or no bits could be set...
IE how do you initialize so only one bit is set?
They do start in an illegal state. The VREF signal comes up slowly, this tends to activate more than one stage, the first minute's pulse sorts it all out.
Thank you for your videos. I admire you very much. Best regards.
This was a great video, really enjoyed the deep understanding of a basic clock that we would all take for granted otherwise. And the digits! They’re excellent.
Hats off to great build
Excellent project and really good video documenting the design and build of this beauty! I really enjoyed watching every minute, and 10’s of minutes :) What level of electronics is this class? What country is your school in? The students are very lucky to have you.
I really would like to learn to use transistors like this, what source would you recommend
This was fascinating - I'd never have thought of this approach. And well done video too! More :-)
9:51 _S&M_ = "Soldering & Matrices" ?
The dividers make me think of a water clock. Beautifully done.
The LEDs in the 1960's looked nothing like the ones used here.
This was a terrific project. Thanks for sharing
Is an electronic Babbage computer viable?
Excelente projeto muito obrigado por fornecer o esquema elétrico do relógio transistor.
Superb video! I'm curious to know the approximated cost for all the parts and material used in that project?
I'll take a wild guess that there is about $300 bucks worth of parts in the clock. Lot's of little bits and pieces add up.
I have never seen such a switching concept with a transistor, just a glow lamp. Very interesting.
I'm planning my relay watch now. Another question is the conversion from 50Hz to 1HZ. Very noisy. :)
Good luck with your other work.
The divider output is very clean and stable. The only issue is getting it set exactly right so temperature changes dont cause the divide ratio to shift
Good work! The only tiny "cheat" was using the LED filaments for the 7-seg bars. Nixies, or maybe a VFD would've been more in keeping with the times.
There were totally LEDs in the 1960s, albeit not much choice for colors and nothing like we have now.
that insane !! great job
Very enjoyable and educational video. Thanks
Genius project
I *love* these videos!
(Also like the Shepard Fairey poster: Obey!)
Great project and great video!
Amazing my brother amazing waw
Well done very nice I love it
Thanks for the video, this was great. I was curious what this would have costed in today's money. Given a single transistor cost at $8.00 equivalent with ~79 transistors would have been ~$630 today! Haha, I wonder how many clocks like this if any were made back then?
In 1960 I think clocks would have still been electromechanical (eg flap clocks) or just straight up mechanical (ie with a spring to wind or a pendulum and weights).
Amazing !
strange.I tried this very same project with IC counters about 5 years ago but it didn't work as expected.and yet I couldn't get to know what went wrong.
Of course it didn't work! This stuff NEVER works until you fiddle with it for twice as long as you expected. Giving up is when it over.
I had trouble trying to reset the tens minutes counter at the 7th count (before the display reads 6)using AND and NOT gates(discrete components gates) with the inputs from the counters segments output.
NOT ( B segment ) AND ( E segment ) =1 ,this is true only at the 7th count for all
0 =< x =< 6.
How do you like that?do you think it 's OK
Impressive!
9:50 - I prefer good old through-hole technology to S&M. ;)
If you went to the trouble of a 100 volt power supply for LEDs, why didn't you go with nixies or neon bulbs to make it truly 1960-retro?
Great question- Nixies are really hard to find where I am.
man, you are briliant!
Nice work
Appreciate the detailed rundown. I want to do this now! ;)
Why involve such toil?
How does that teach transistor tech.
Wax on, wax off. My students learn to solder and actually build things with thier hands.
Like the divider, remind me about the put transistors.
Muito bom esse projeto
excellent videos
You know ..? I am kind of rusty about basic analogic design. Now we even use an arduino to turn on a lamp ..! I will replicate some modules in my lab to refresh the ideas .!
An Arduino? Pfft. Why use an Arduino when you can use a Raspberry Pi
@@rexsceleratorum1632 because it works fine, lot of people use to code that, and cost pennies ...
@@perrooceaniko2005 That was sarcasm
Great project
100V boost converter : overkill !
Use diode-capacitor ladders to multiply the voltage from the transformer :-)
This is particularly adapted to the low power draw of the LED.
Great idea! Next time!!!
@@leosbagoftricks3732 Keep me informed !!
Do you use Falstad's simulator to prototype your circuits with the students ? Did you see tinyurl.com/vayr4ab ?
I am working on "neovintage" clock circuits that use actual 60's era parts, with no silicon (germanium, eventually selenium) and I'm looking for circuits that use only one kind of transistor, not complementary pairs (Germanium PNPs are even harder to source).
I would be happy to help with your next crazy projects, look at my videos and my HaD profile :-) hackaday.io/whygee
10:00 My first thought was you were gonna go _super_ analog -- using the phase differences between an oscillator's 3rd or 5th harmonics and the input signal to govern the lower-frequency oscillator -- with three /5 stages, a /3 stage, and then just three flip-flop stages for the /2. Fortunately not, since that would be quite insane to attempt with such low frequency signals lmao.
Using LEDs, especially the very modern white ones instead of rows of incandescent bulbs seemed an out of bounds choice given the stated, albeit arbitrary, technology limit. Why no colon in the display and no AM/PM indicator or better yet, a 24-hour format? How about a laser cut diffusing lens for each display element? These are really just suggestions for the next iteration.
I remember taking apart basic digital alarm clocks and finding they all used a single 0.6" wide DIP.
Wow! Great.
9:40 two transistors per flip flop? How is that possible? An AND gate takes two transistors, a NOR gate takes 3 transistors and the Inverter takes 1 so that a D type Flip Flop takes two AND gates, two NOR gates (S-R latch) and a Inverter for a total of 11 transistors.
thanks Leo
you slightly looks familiar with mark ruffalo..
Legend
Как транзисторные часы на стене могут чемуто научить студентов?!
One strange question please !
How all this can work , along DC Power supply, ... Because
all those Capacitors are not supposed to do anything
in DC Circuits...
... 🤣😬🤣😬🤣...
I am just a total newcomer into
Electronics, but my understanding so far is that capacitors are
Reacting only in RF or... AC environment , but in a DC they act
Like switches in OFF position .
🤐🤐🤐🤐🤔🤪😬😱
It's all DC until the voltage changes, then it's AC
@@leofernekes343 still don't get it
...but you gave me a Hint ...to
dig deeper into the Rabbit hole.
...
At the moment I am at
1800's level of understanding ....
...
... Wandering around with B. Franklin and looking into a dark cloudy Sky!!!
☂️⛈️🌩️🌩️🌩️🌩️...
Thank you !!!
Honestly sounds better than my engineering courses
The lesson seems to be buy a clock... Cool project but a lot of work for a clock.
i accidentally searched it ..
"... technoligy available in 1960."
"... filaments from a decorative LED bulb."
lol
Buy=5$
DIY=50$😂😂
More like "Buy=$5" DIY=$500!
@@leosbagoftricks3732 Buy=$20 DIY=$500+Lose Time😀