The Curta Calculator: A Mechanical Marvel Explained | Part 1

[@quasar-ed]

I want to take a moment to apologize for using an AI-generated voice in this explainer video. I understand that a real human voice can provide a more engaging and personal touch but unfortunately English is my second language. However, I want to assure you that everything else - the script, research, and animation - was done by me with many hours and days of hard work. Your appreciation of this effort means a lot to me. As my channel grows and I receive more support from viewers like you, I plan to invest in professional voiceover services to enhance the quality of my content. Your understanding and support are greatly appreciated, and I am committed to continuously improving the experience for all of you. Thank you for being a part of this journey.

[@A_NSF]

Thank you, the animation was great

[@jesuizanmich]

I didn't mind, but I would honestly prefer an ESL accent over an AI voice. Your disclaimer shows you are quite proficient at English, so I don't think people would have minded an accent. With so many disinformation videos out there using AI voices tho, my concern is that it would cheapen an otherwise fantastic animation with great research. Great video btw. The animation explains very clearly how Curtas use Leibniz's stepped drum and how the carry works.

[@quasar-ed]

Thank you for your support...

[@quasar-ed]

@@jesuizanmich Thank you for understanding...I will try to practice my speaking skill for future videos.

[@nicholasryanscroggs8761]

Great video. Just do your own voice. Issac Arthur had/has a speech impediment and narrates 2 videos a week. Trust me. If the content is good (and this was), then people will adapt / get used to it

[@RossMinchev]

The Curta is a piece of art as well as your 3D animation

[@quasar-ed]

@@RossMinchev Thank you..

[@dscott1524]

I have one. It is truly a mechanical marvel. But I never knew how it actually worked. Thanks so much for the explanation. You have cleared up the operation wonderfully. Now I am even more impressed with my Curta! Thanks and Cheers.

[@quasar-ed]

@@dscott1524Please wait for the part 2. There are more amazing mechanisms left to explain..

[@VoidHalo]

I want to say there are videos of people taking these apart on KZbin. But, I could be thinking of other, much larger mechanical calculators. CuriousMarc comes to mind. He's done videos on mechanical calculators before, but again, I'm not sure if he did the Curta or not. It's been some years since I've watched anything about them.

[@robertcampomizzi7988]

My dad tried to explain it to me when I was younger but I didn't have a grasp yet. This video is fascinating. I hope you get a newfound appreciation for that curta of yours.

[@klepaul8845]

I own one too and want to thank you a lot for your genious explanations 💚💚💚💚💚💚💚💚💚

[@ckruberg]

Wow. I recently found one of these in my late aunt’s effects. She was a food scientist. I’m an engineer but no clue how it worked but the quality told me it was something extraordinary. And made in Lichtenstein of all places. Probably not used since 1950s. Finally a “how to” guide as the instructions were not clear. Thanks ! It works like a charm and in mint condition.

[@quasar-ed]

@@ckruberg Hope you have fun..

[@Vordigon1]

You have to make a video of it, as it sounds like it was one of a kind.

[@4wheelwarrior]

dude, normally I scroll right past stuff with a synthesized voiceover ... but you explained why right up front, and you did an incredible job on the animation. Fascinating presentation, Thank You!

[@quasar-ed]

@@4wheelwarrior 🤓🤓 I'll try my own voice next time..

[@szjvd]

ME: I understand everything . My BRAIN: No You Don't.

[@quasar-ed]

😅😅😅

[@iainmassey1330]

I’ve used one, but only tinkering. We already had the first electronic calculators, with vacuum glow tubes for readout. It’s an amazing little device, sitting comfortably in the hand with a very precise feel to the mechanics. That was about 1968. Always wondered how it worked, and I’ve never seen one since. Thank you!

[@quasar-ed]

I wanna see that vacuum glow tubes calculator.🧐🤓

[@vincentjosse6009]

Hard to say what is more amazing, the mechanism or the video you made of it. Brilliant job done.

[@quasar-ed]

🤩🤩

[@dlmsarge8329]

As a teenager I was fascinated with these!! I first saw them written up in The Whole Earth Catalog, which I used to study for hours at a time when I was supposed to be doing my homework. I'm thankful for the memories this video brought back and it's excellent description of its workings!

[@quasar-ed]

@@dlmsarge8329 Glad it helps..

[@phantomdeluxe9680]

amazing work of art animation and mechanics keep it up bro

[@quasar-ed]

Thank you for the support. I'll try my best.

[@aracoixo3288]

Yeah

[@theronwolf3296]

I have one in pristine condition, it was purchased by my father in the mid 60s. Nice animation.

[@quasar-ed]

Thank you...

[@joselaboy1643]

Take my money and keep up the amazing work.

[@quasar-ed]

OMG. I got super thank 😳😱🎉🎉. Thank you so much for your support.

[@unrealheadcase]

Your appreciation for this engineering is contagious, nicely done!

[@jeffreyleonard7210]

Thank you for creating this video. My grandfather had one of these. He was a patient tinkerer, and repaired gravity as well as spring-powered analog clocks. However, his Curta did not work. Your excellent presentation leads me to believe that one of the clips broke. Patient as he was, in 1972 he was not able to fix his Curta.

[@OmarAlvarez-t9d]

Excellent explanation! Graphics are very clear and help understand this mechanical marvel.

[@harryw9268]

This was amazing, I actually understood how it works. Thank you for the effort you put into this, I hope your channel does really well.

[@quasar-ed]

Thank you..part 2 will be coming soon.

[@038Dude]

People back in the day were different man, this genuinely gave me goosebumps. I cannot even start comprehending how one is supposed to figure this out, so many moving precision parts with everything working in perfect sync. I'm blown away. 🤯

[@quasar-ed]

@@038Dude That is how I felt when I first saw the Curta..

[@038Dude]

It's safe to say that this is the work of a genius. These are people that know how to utilize the entire mental tool chest. Instead of people like me, that in comparison barely know how to hold a set of pliers. 😂

[@georgschenkfilm]

I got my curta today, it truly is a piece of art! It came with a manual but watching your animations and explanation is way more interesting! Thank you!

[@quasar-ed]

@@georgschenkfilm Thank you.

[@Ifenya]

Fantastic CAD work, animation , script writing. Looking forward to more of your work!!

[@quasar-ed]

@@Ifenya Thank you..

[@av8bvma513]

01:13 ERROR! The graphic on the cap is correct, with Open - Turn to the left, but the animation case has a right hand thread and the top is screwed on as if this was correct.

[@EmmanuelCoirier]

It triggered me too 😅

[@quasar-ed]

I didn't pay attention to the case during animation, sorry about that..

[@EmmanuelCoirier]

@@quasar-ed no problem 😁

[@lost--3902]

Humans are amazing ! What an oberservation.

[@marianf25]

Wow! Your channel and this video deserve many many more views. I hope it goes viral, the quality is top notch!

[@quasar-ed]

Thank you for your support...🥳🤓

[@RR-vu8ch]

In mundane and monotony, these videos being a breath of fresh air. World is made more beautiful by poets, Artisans, Craftsman. Thanks. It's a marvel. Real videos inspire people to go further in their aspirations.

[@quasar-ed]

@@RR-vu8ch Thank you.

[@garygrebus1602]

Fantastic explanation and wonderful graphics! The Curta was popular into the 1980's for competing in Time-Speed-Distance car rallies. They were perfect for doing continuous calculations needed to make sure you were running on time.

[@quasar-ed]

@@garygrebus1602 I didn't know that..Thank you.

[@iHaveOneOfEach]

Could be done with a dedicated sliding rule (3 parts) instead of a Curta, I guess potentially 1 more digit of precision made Curta a win.

[@leyvarecio3699]

I can't wait for part 2 this is the best explanation I ever seen of the curta calculator

[@quasar-ed]

Thank you..

[@deconstructionnation2392]

This is incredible. Both the original engineering and your production of this video are stellar.

[@quasar-ed]

Thank You.

[@paulbaker916]

Incredible engineering that has been served by a first class video production. Excellent work.

[@quasar-ed]

@@paulbaker916 Thank you.

[@GillesSoulet]

This 3D animation is pure Genius. Bravo !

[@oybekoyhonim]

So simple, yet so elegant~~

[@AkelaInsaan-y4q]

Mark my words, this channel will do the best. All the best mate.

[@quasar-ed]

🤩Hoping for the best..please keep supporting.

[@minutelearn7663]

Bro you deserve more subscriber at least million

[@quasar-ed]

@@minutelearn7663 Thank you. Still trying my best.

[@joyel5873]

Fantastic video. Really explained well about the working of this magnificent device. Please continue to create more such videos of other incredible inventions.

[@HildeTheOkayish]

This was a great video! Very clearly explained and the visualisations where easy to understand. Thanks for making it! (Now to see if part two is already released :p)

[@EmmanuelCoirier]

Very very good video. Your explanations on how the carry mechanism is working is wonderful. I’ve also learned how to spell subtraction !

[@TinLongYeung]

this is the best video in youtube

[@jayballauer8353]

A terrific video. I have a Curta Type 2 myself and it's extraordinary. This is the best video I've seen at showing off how it works.

[@quasar-ed]

Thank you, your type 2 must have more digits..

[@ashritsai3744]

Wowwww, superbly explained, hats off, this channel is going to become great, trust me, all the best 👍

[@quasar-ed]

😊😃Thank you so much..

[@smalin]

I see how carry works for a single carry, but what about for multiple carries (e.g. 999999 + 1)? How does the carry work its way through all the digits?

[@quasar-ed]

@@smalin all the carry levers will be pushed down one after the other. The carry propagates from each digit to the next until it gets to the most significant digit which neglects the carry..it won't be instantaneous like electronic computer, you can see the carry propagation along with the single tooth of the step drum. Hope that makes sense...you can also check out the simulator, I put the link in description..

[@robertsteinbach7325]

Multiple carries implies that the carry gear and the tens bell are executed in each place in sequence as the crank is turned. Meaning the carries are propagated right to left by the crank’s action. This is a common method for most mechanical calculators.

[@quasar-ed]

@@robertsteinbach7325 exactly..Thank you..

[@iamthestorm925]

This is the coolest thing I see today

[@quasar-ed]

@@iamthestorm925 Thank u..

[@timthompson468]

I managed to pick up a couple of Type II units. I doubt if either has bee serviced since leaving the factory in the 1960s, but they both function perfectly. You can practically feel the quality and precision. It’s very interesting to see the inner workings.

[@mathmeetsmachines]

Excellent, in particular the explanation of the carry mechanism!

[@altaris6593]

I love this machine!!! So clever, so perfect!

[@SDFNI3894YR]

this was seriously amazing video. such animation and clear crisp explanation.

[@quasar-ed]

@@SDFNI3894YR Thank you..

[@gunnert4562]

Amazing work! Can't wait for part 2!

[@quasar-ed]

@@gunnert4562 It is now in final rendering stage. Coming out soon.

[@TheRojecas]

Excellent work, very well explained, thanks for sharing, and waiting for the next chapter - Greetings from Colombia

[@quasar-ed]

Greeting...Thank you for the support, the next part coming soon in about 2 or 3 days..🤓😇

[@okjhum]

I too have one Curta. It's really an amazing piece of art AND engineering. Incredible how Curt could figure ot how to build it. And your animation is truly amazing too! Can't wait for part 2.

[@quasar-ed]

@@okjhum part 2 is out..

[@okjhum]

@@quasar-ed Haha, I found it right after I published my comment! :-D Thank you for all of this impressive animation work. How did you do it? X-rayed a Curta and 3D-printed each part digitally??

[@quasar-ed]

@@okjhum There is a CAD model on 'the curta page'. So it helps a lot, although I need to clean up the topology for rendering and animations.

[@gemeindemauren3291]

Nice Video! Thank you so much! The Curta has been produced in Mauren, Liechtenstein and many of the employees of Contina are still living in our village.

[@quasar-ed]

It would be honor to meet these master craftsmen..

[@ckruberg]

@@gemeindemauren3291 I have a Contina camera inherited from my mother who emigrated from Germany to Australia.

[@neilreynolds3858]

Thanks for the breakdown. Babbage would be proud. I love old mechanical devices. I've wanted one of these since the 1950s but I've never been able to afford one. Maybe in my next life...

[@quasar-ed]

yeah..I also love these mechanical devices..Would you like to see more devices like this?

[@Lunalight_Ambient]

Such a creative approach, loved it!

[@neurojitsu]

Brilliant explanation and animation. This must have been a lot of work!

[@dondec]

Absolutely wonderful. I read about the Curta as a kid. It seemed almost magical and of course I wanted one. I had a mechanical pocket Adding device, a stylus based mechanism that for its day was pretty clever. But it could only do Addition and Subtraction. I wondered how the Curta could multiply. Well, I just found out through your vid today. Impressive... the device, your animations and explanations. Applause.

[@quasar-ed]

@@dondec You mean this one kzbin.info/www/bejne/aZaaqqZogN95hLcsi=-U0GshBIqOMPCFia?

[@quasar-ed]

@@dondec And Thank you for appreciation..😇

[@dondec]

@@quasar-ed I can't believe you described and animated my old Calculator... which was indeed called the Magic Brain, exactly as you showed. You have the same fascination for ingenious devices that I have, but your animations are Haha, way better than mine (I was a beta tester for Maxon's Cinema 4D years ago). Anyway, I have to share this story. When I was 12 years old, on vacation, we stopped at a restaurant that had a old fashioned mechanical slot machine. I could hardly believe what I was seeing. This purely mechanical device, checked for the right coin, then allowed the pull arm to spin the wheels that stopped in a staggered 1,2,3 sequence then somehow sampled the result, delivering a precise payout in coins. As a kid I tried to figure out how it worked, making many diagrams on paper. I couldn't even figure out how the pull arm made the wheels spin, LOL, let alone sequence them 1,2,3 and sample/deliver payouts. 40 years later I bought a similar machine as an antique, a Jennings machine. I had to take it apart to finally satisfy my childhood curiosity... how it worked. The thing is truly one marvel after another. Real genius stuff. I made a movie about it here. You're welcome to watch it... I think you'd love it. Ignore the title, I asked a couple Remote Viewers if they could sketch what this was. Thx for your videos and here's the link: kzbin.info/www/bejne/i4Cben9qfLJsn8k

[@quasar-ed]

@@dondec Thank you so much for sharing that story. I would love to make an animated explainer about that if I have a chance to see all the parts..

[@time4062]

You are absolutely the best in this explanation ❤

[@quasar-ed]

@@time4062 Thank you..

[@blockhead9746]

I did my engineering apprenticeship at Rolls Royce in Bristol from 1969 until 1975 and continued working there for a few years afterwards. The engineers in the design and performance departments used them all the time and they were very adept indeed.

[@quasar-ed]

I didn't know Curta was used in these serious fields. It is like mechanical calculators were lost tales when the electronic ones came out. Being a 90s born, I always believed calculators were always electronic until a few years ago I found the Curta. Thank you for the info.

[@blockhead9746]

@@quasar-ed Rolls Royce had a computer department but it was a slow turnaround. You had to submit your punched cards to the department and then pick up the results the next day. For quick results and making initial design calculations they used the Curta. I sat opposite a guy who used one all the time and it fascinated me to watch his fingers flying. He worked really fast. Electronic calculators were just starting to come in to general use. At the time I still used my slide rule which had taken me through college, I still have it.

[@rohitpv7676]

Amazing invention... You explained it like a charm

[@maxmn5821]

Thank you for a great explanation! I‘d like to give a shout out for Chris Staeker, he has few Curta videos, too. There are many shortcuts to calculations; I‘d like to mention one. When multiplying with e.g. 99, you would do one plus turn with x100 and one minus turn with x1.

[@chriss4365]

Amazing how someone thought of all this. I'm going to try to make a basic calculator using only switches and leds.

[@rahdar2008]

You made to wish I could have one. Such an amazing explanation.

[@quasar-ed]

🤩🤩😇😃

[@MrBerryK]

I’ve coveted one since the 60s. Back then they were too expensive for a schoolboy, and then when I could afford one, electronic calculators were much more affordable and I had kids to raise. Now I’m retired, and they’re collectors items, and once again, too expensive. Sigh.

[@rahdar2008]

@@MrBerryK Yeah, I searched on many sites too 😂 but still very very expensive. Hope one day get it.

[@HWPcville]

Excellent video and animations. I've never heard of a Curta Calculator but I did have a rudimentary introduction to the slide rule. They both can be fantastic instruments if the operator is skilled in all the intricacies. Thanks for all your work.

[@quasar-ed]

@@HWPcville You are welcome..

[@wood6454]

what an amazing little device. thank you.

[@joosepkunder]

Impressive animations and truly interesting mechanical marvel. Thank you for your great effort to educate us.

[@avnertishby]

Superb video! This must have taken a lot of work and it is very much appreciated! Subscribed.

[@quasar-ed]

@@avnertishby Thank you so much...

[@villainbydesign]

Wow, an A I. Voiced video that actually has substance. Well done. A very intriguing device.

[@quasar-ed]

@@villainbydesign Thank you..next time will be real voice..

[@hamzavictor2385]

I have never understood this mechanism this well. Wow, I wish I had one

[@tomisss3]

Awesome invention, never heard before 🤯 Awesome video and explanation!!! 👍

[@quasar-ed]

@@tomisss3 Thank you..glad it helps..

[@witcher8004]

If you dont mind Which software you use for creating this model/animation

[@quasar-ed]

@@witcher8004 I use Blender, the best tool ever for any kind of content.

[@mehdielkamch9257]

this video is amazing man , thank you so much i learned a lot ! :D your work is high quality

[@quasar-ed]

@@mehdielkamch9257 I am glad you learned something from my video. Thank you for supporting. I'll keep making better videos.

[@josef596]

Very nice piece of kit. A handheld mechanical ALU.

[@esotericmissionary]

I first heard of the Curta in William Gibson's 7th novel, _Pattern Recognition._ It's a "background item," meaning it's not part of the main plot, but I've always wondered about them, due to their being mentioned in a genuinely novel way in the story.

[@jamesmccrea6106]

It’s on my wish list

[@terrillcrookshank4363]

📸 awesome like I turned my life around like 360 degrees.

[@altaris6593]

Nice work dude!

[@lamarstunts1846]

U just earned a subscriber. Im sure it took you days to make this video and the only way of appreciating your effort is to subscribe. 🎉🎉

[@quasar-ed]

Thank you for your support. I'll try my best.

[@IAmNumber4000]

That is so smart. Wow

[@scooped85]

What a great video, you're very talented

[@quasar-ed]

@@scooped85 Thank you.

[@ChangeOfMemory]

That’s is how AI voiceover should be used, allow people to spread their knowledge when English is not their first language, and not for content farm that spit out useless video

[@quasar-ed]

Yeah..because of those content farms, some people mistake my videos for "AI content" not worth watching , even though I only use Ai voiceover.😔

[@You_took_my_crutches_away]

@@quasar-edyou did amazingly the animation is so beautiful 😊

[@zeropol]

Great modeling and animation ! ( and interesting engineering piece )

[@Giovimax98]

Amazing explanation, very interesting device.

[@Tgolden069]

This is actually insane.

[@edwardcrocker4015]

Love this little mechanical marvel

[@FengXingFengXing]

This why modern computer use binary number system. Binary version of this device wider for more digit but much shorter because only need 0 or 1. Also need switch for convert number become 2 complement for subtact number. Multiply for binary number easyer too, only need shift and add depend if digit 0 ôr 1. I like you speak your language and I can read subtitle. 😁

[@vaisakh_km]

Why this channel don't already have a million subs? (999th sub btw...)

[@iakan6937]

The urge to get one of these just so I can take it apart is strong

[@Alexandru_Narcis_Popescu]

Please tell me where you got the technical drawings after which you modeled the components in 3D?

[@quasar-ed]

@@Alexandru_Narcis_Popescu There is a CAD model on the Curta page. I don't think there is any technical drawing on the internet. So the CAD model must be derived from measuring each component. If you watch my video part 1 and part 2, you will understand the working principle and then you can work out the design from that..hope this helps.

[@congahydra9996]

absolutely brilliant

[@quasar-ed]

@@congahydra9996 Thank you..

[@SciencXplorer]

After 5 mins everything went over head 🤯, Actually started watching this after being unable to sleep but brain had a forceful shutdown and had a great good night sleep.

[@quasar-ed]

@@SciencXplorer glad my video gave you a sound sleep..

[@SciencXplorer]

@@quasar-ed Please do take this positively. Kudos to you for all the effort taken in explaining such an extreme level of complexity in a more understandable manner. All I wanted to say was that I have to watch this video 2-3 times to digest everything being explained.

[@quasar-ed]

@@SciencXplorer Don't worry, I got your joke..Thank you for your support..😀

[@don.3s]

This is super awesome!!!

[@quasar-ed]

Thank you!!!

[@olafzijnbuis]

Beautiful work! I am the author of YACS, the Curta simulator you mentioned. How did you find YACS? Is your model interactive? Did you use the engineering drawings I linked to on the home page of YACS? I wrote this YACS thing in VRML in 2008. I did not have access to the blueprints, but I used measurements from Rick Fur on a real curta. Only after YACS was completed did I get myself a Curta (Type II). Are you a Thai Citizen? I was in Thailand for 4 weeks last January. Lovely country. My first time in Thailand was in 1979...

[@quasar-ed]

@@olafzijnbuis OMG..Thank you so much for your work on YACS. Without it, I wouldn't understand how the curta works. I also used the drawings from your links. I wanted to make my model interactive but I don't have enough experience writing blender scripts. I thought about learning Unreal Engine but then it will be like a game which is not suitable for animated explainer. At the end I just manually keyframed all the motions. I found YACS while trying to understand how the curta works. I always want to create a program like that and it is still in my bucket list. So much respect for your work. I hope to get some guidance on how to write such a program. I am from Myanmar. Due to the civil war in my country, I have to delay my study and move to Thailand... Anyways, Thank you so much, your comment means a lot to me..

[@olafzijnbuis]

@@quasar-ed Thank you for your reply. I visited Myanmar twice when it was still called Burma. The first time was April 1979. I took a train to Mandalay and then by plane to Pagan. At that time you could only stay for a week. I was allowed to travel to Mandalay by train but not by bus to Pagan. I remember it as a nice country with friendly people living under an unpleasant government. Later I stayed 1 week in Rangoon. for some weird reason, tourists were no longer allowed to travel much. As for making an interactive model... I used VRML as the main language as I used VRML before (in fact as early as 1995) If I had to write anything that big now I would certainly use other tooling. Not handwritten VRML. I used VRMLPad, a special VRML editor. It helps a lot with the syntax, but you still have to write bare VRML. The latest version of YACS uses the X_ITE VRML/X3D browser. They also have a 3D modeler, but I never used it.

[@quasar-ed]

@@olafzijnbuis Thanks for sharing. Seems like you travel a lot. I never heard of VRML before. What techology would you recommend if you were to build one today? like three.js or C++.

[@olafzijnbuis]

@@quasar-edIn the end all this interactive stuff is displayed using OpenGL or DirectX OpenGL (as is now used for YACS) can be used on many platforms. I would go for a 3D modeler that outputs x3D (the successor of VRML). But I have never really used such a modeler before. Maybe it is possible with Blender. Modeling everything in hand-written VRML is a LOT OF WORK. It took me a lot of work to figure out how the Curta works. There are many nice solutions. Like the 2 cams used in the clearing mechanism.

[@ant5389]

awesome video but 2 small things; at 1:18 the case is being opened the wrong way, it was threaded the opposite way to avoid the container from slightly spinning the crank when the container was closed, because you cannot reverse the crank once you start to spin it 5:38 i might be wrong, but as of my knowledge, the dial on the side has 4 arrows, 2 on the top, 2 on the bottom, on the top theyre both pointing left, the bottom ones point inwards towards the hole (theres 2 arrows on the left side of the slot, 2 on the right). btw by on the top theyre more so drawn in the middle, then the bottom is drawn just below those arrows my knowledge might be wrong, you seem to have done a lot of research, but thats what ive seen about the outside. i do not know enough about the insides to comment on them, so thanks for teaching me about it, i appreciate it :D

[@SynthoidSounds]

Interesting (and brilliant example of mechanical invention), it would become very relevant during a post apocalypse era, when batteries and most electronic devices are no longer relevant.

[@quasar-ed]

@@SynthoidSounds imagine if we haven't invented transistors, there would be more mechanical systems like in steampunks..

[@wetwillyis_1881]

I just have to say, as a Data Science major, the decimal place holders are the most genius part of this to me.

[@quasar-ed]

I know. Right!

[@lemonbitter7641]

Keep it up ❤from india 🇮🇳

[@StevenHokins]

Really nice video, good job

[@osmacar5331]

It's... Beautiful.

[@MinecraftTestSquad]

i just want to say the lid of the container rotated the wrong direction for opening/closing and i laughed because everything else in the video seems super well-made and there's that amusing unimportant oversight

[@quasar-ed]

@@MinecraftTestSquad Yeah. I didn't even notice until few people point out.

[@MinecraftTestSquad]

@ oh my god you still respond to this video. I watched both episodes of the series and I really enjoyed it! Many thanks to you for making these videos, and I think I’ll be checking out the rest of your channel because of them :D

[@quasar-ed]

@MinecraftTestSquad Let me know what you think about other videos.

[@stefanguiton]

Excellent video,!

[@kellymoses8566]

Designing this using modern CAD would be impressive enough but it was actually designed using paper which is just insane.

[@quasar-ed]

@@kellymoses8566 Those times were truely impressive.

[@bobk5925]

So when adding 16+14, how does does it know to go to 30 and not 20? are there multiple 10s bells?

[@quasar-ed]

It is because of the carry mechanism.

[@samurainair1]

Amazing video

[@hughobyrne2588]

1:15 Is the direction of the "Open" arrow wrong, or is the amimation wrong?

[@quasar-ed]

@@hughobyrne2588 I didn't pay attention to the container, sorry about that...

[@hughobyrne2588]

@@quasar-ed Oh my goodness. Looking back on that comment I wrote... it does not express that I was impressed by the quality of the video, I enjoyed it, and I am grateful for the effort you put into it. These things are all true, you've made a great quality contribution to KZbin, be proud. And I'm sorry that absolutely zero of that came through in my original comment, that was poor phrasing on my part.

[@akhtarnadeem621]

Amazing!

[@MaskedMarble]

Very cool