Homemade GENERATOR GEARBOX | power almost any usb device.

Follow along as I 3d print different gearboxes, try different gear ratios, and explain the science behind these mechanisms.
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3D PRINTED GEARBOX GENERATOR | power almost any usb device.
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3D Printed GENERATOR | power almost any usb device [6.6]
#gearbox​ #ender3pro​ #gears​ #gearratio​ #ratio​ #3dprinted​​ #marblerun​​ #satisfying​​ #machines​​ #tech​​ #ASMR​​ #create​​ #3dprints​​ #3dprinting​​ #3dprinter​​ #galaxy​​ #marblemachines​​ #workshop​​ #woodworking

[@turnipt8422]

lmao during your voiceovers you can hear 3d printers going in the background. This man is never wasting time

[@garlckbread]

Hey, when you gotta make something as large as this, it’s gonna take at least a day

[@galaxy-gr3ei]

@@garlckbread more than that probably

[@OrangeC7]

I was watching a yt short (I don't know if it's this same guy or not) and you could hear the 3d printer in the background there too. These guys print.

[@NomSauce]

Considering how long it takes to 3d print, not surprised at all.

[@NomSauce]

@@galaxy-gr3ei Easily, takes several days.

[@legiblegraph2572]

Friend: Can I borrow your charger This guy: Ok, sure Friend: What is this? This guy: spin it

[@kitsinthewebs222]

What a flex

[@LSniumUwU]

Friend: youre gay. And poor.

[@johnsimun6533]

Yea, everybody knows how smart you are. Can I just get a wall charger.

[@Lunus909]

beyblade let itrip

[@boykin740]

"What is this?" "FULL BRIDGE RECTIFIER"

[@fuze9150]

I’m in 5th grade and this little video literally just made me understand all of how this stuff works my teacher would make it so much more confusing and a lot longer

[@chillyconmor]

thats the school system if they push out the education too fast they have the rest of the school year with nothing and get fired

[@thePyiott]

Talk to your parents or other adults you are close to about your curiosity for learning and how you feel about school

[@GhostKing6790]

You’re learning gear reductions, circuits and 3D printing in 5th grade?

[@GhostKing6790]

@DBSTKjS You were learning circuit design at age 10?

[@citricdemon]

your teacher probably doesn't know how it works. The best way to learn is from people who know.

[@braamvanzyl2531]

What a wonderful project. Not only did you explain the concept of gear ratio in a simple way to understand, but you also explained how alternating current works. I had to show my kid your video immediately. Your simple demonstration brought that concept over clearly. Thank you for that. I also like the comment lower down of using a bike on a trainer as the power source. Maybe you can make a project out of something like that. Imagine people sitting Zwift pedaling away, and generating enough power to charge a phone or other stuff.

[@alexanderwatson9845]

FULL BRIDGE RECTIFIER!!

[@legohexman2858]

It's time to rectify some assholes

[@wikedawsom]

FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUULLLL-

[@GinamosWithCherryOnTop]

Booooooom

[@gameryusic825]

@@legohexman2858 i doubt this video is fake.

[@Purple431]

No free energy device!

[@moltenhydrogen2218]

"damn it! I killed a phone" - Mehdi, after forgetting to add a voltage regulator

[@innocentidiot9521]

I did it a while ago, although not with hand crank generator but with adjustable powersupply. I was using it for something else(22v) and then forgot to set it back to 5v. Luckily only charging board fried and nothing else. It works now fine after swapping cheap board with new one. Also my phone isn't that picky about voltages that I charge it with. It charges with voltages of 4.2-10v. Probably because it support fast charging (15w, 8v). It starts complaining if I charge it with less than 2w.

[@adammcfall5133]

Might as well add a capacitor bank too.

[@drakefrid4948]

Who is Mehdi ???

[@NoZoDE]

German KZbinr Tomary once pushed 25 volts into an I phone while he was doing basically the same thing as in the video and his I Phone survived

[@noahhunt871]

@@drakefrid4948 electroboom

[@BugMagnet]

That is a fun project to do. I really enjoyed how you explained the improvements on the gear design. Making arrowhead gears easy is one of the great advantages of printing them. My wife and I tinkered with a similar design once and we used the DC motor of a truck windshield wiper as a generator, making the electrical setup a bit easier. Where these simple designs all fall down sadly is that while a human can easily go way beyond the power output of what a USB charger can take, spinning these devices for hours on end is not fun. So the endgame of these is adding a more powerful intermediary battery storage and then control the outgoing voltage and that is where we noped out of that project.

[@ORegan77]

I enjoy that while it not have been on your mind while making the video, your explanation of a coil surrounded magnet rotated by gears to create a current to charge a battery is exactly how an alternator operates in cars.

[@allisonavery7273]

That’s what I was thinking as he went over it. It’s fascinating

[@claytonstrange494]

Damn, I gotta crank one out cause my phone is about to die. Be back in a few.

[@jasparcody7792]

Bro... it’s been 2 days. You good?

[@graham4520]

@@jasparcody7792 He still goin

[@duttad1]

Legend has it that he is still cranking that thing

[@garlckbread]

@@jasparcody7792 it takes about that long to print, calibrate, and reprint it so don’t worry yet

[@claytonstrange494]

Damn, sorry it took so long. My phone is finally charged but I sure am drained.

[@tuxrandom]

For directly charging most phones (including iPhones) you just have to short the data pins together. Many USB power supplies use this way to tell a connected device that up to 1 Amp can be delivered. Also, you should use one of those step-down converter board instead of a linear voltage regulator as the latter can only supply about 200mA at best without overheating if you don't attatch a heatsink. And they also require an input voltage that is at least 2V more than the output voltage, which usually isn't the case for the (by the way much more efficient) step-down boards.

[@brianh.000]

"Step-down converter board". Yes! This device is called a "buck converter", and is dramatically more efficient than a voltage regulator--especially for higher current applications. 👍 He could design one himself for this specific use, but fortunately general purpose buck converter boards can be had for a ... buck and some change (pun intended).

[@evenvega3728]

The way you thoroughly explain every part you add is so awesome and shows awesome skill, thank you for that. I feel like I learned a lot!

[@TheLordNemesis]

I'd scrap the belt, it looks cool, but it takes energy to bend the belt and overcome the additional friction. Also the linear voltage regulator wastes excess voltage as heat. You could use a DC-DC converter like the LM2596 instead (ready to use boards available), which can convert almost all of the input power to 5V. Many smartphones accept chargers with the data lines shorted together, you could try if that works.

[@3DPrinterAcademy]

Cool! Just ordered some LM2596s. Hopefully I can get more current!

[@rutger3856]

Yeah one of these LM2596 modules can easily charge any phone. I think using the machine with the switching regulator would really increase the satisfaction of using the device as the power actually increases when you turn it faster

[@10054]

Everyone be QUIET! The super brainiacs are talking.

[@KL-tn1xc]

@@10054 who asked?

[@10054]

@@KL-tn1xc Bro I was calling them smart-

[@abrarfaiyazkhan420]

8:09 Just felt in my brain that Mehdi screamed 'FULL BRIDGE RECTIFIER' loud out of the screen, and he appears! 🤣🤣

[@eksboks148]

Oh yeah

[@aditsurya4917]

🤣🤣🤣🤣

[@watwat7097]

The voltage regulator has a current limit. Had the same problem while doing almost the same experience. Still trying to find a way to regulate without having to make a huge complex circuit. Your generator is really well done!

[@immortal1541]

these videos help me with my science lessons and they're entertaining at the same time. keep up the good content 👍😃

[@bxndxlx4150]

I have an idea. Instead of drill, connect it somehow with some gears with a bycycle. And then just sit on it and spin as much as possible so you can see how much voltage you can get. It might break, but i think its worth of trying.

[@sapateirovalentin348]

Your knees will break first lol

[@kevinmendez8443]

Just use a low gearing on the bike But a high gearing on a bike will give more power bit takes some force to pedal

[@wparkerunc]

bro tip: use magnets for faster pedaling

[@Alientcp]

You can use it as a challenge to exercise. You can only use your phone with the battery you generate. Want a full charge? Spin it.

[@internetuser8922]

The channel Great Scott recently did this

[@quadracycle4000]

3:1 is good, but don't forget to add/subtract a tooth from the larger cog. This means that all the teeth from one cog will mesh with all of the teeth of the other, reducing wear. At 3:17 it looks like you have a 20t/60t setup. A 20t/61t would be much better!

[@onebacon_]

Why is that? Wouldn't a 10cm gear with 30 teeth match perfectly with a 5cm gear with 15 teeth?

[@bobby_greene]

@@onebacon_ if there is one damaged tooth on one cog it will interact with the same teeth on the opposing cog every time. If the teeth don't divide evenly the damaged tooth would line up with a different tooth on the opposite cog until it completes the pattern, which in the given example would be 61 turns of the 20 tooth gear.

[@onebacon_]

@@bobby_greene ah ok thanks for the explanation. The 61 gear has to be slightly bigger than the 60 right?

[@bobby_greene]

@@onebacon_ if you want the teeth to match up right

[@johnpalmiano3856]

Woah u r smart mart

[@NilesBlackX]

Finally someone who actually makes the content we want to see

[@jamesstephens9501]

Very cool design. Excellent work. I feel late to this, but it would definitely be cool to see a pedal powered one of these that you could put up against the wall, and generate some extra torque that way. Maybe get a bit more power from the system.

[@Bearbait01]

Walt and Jesse sure would have loved to have this when they were stuck in the desert in the RV.

[@duttad1]

Jesse, we gotta crank.

[@internetuser8922]

Most car starters are 1.4KW or ~116 amps or 0.097 Amp-hrs at 3 seconds, so you'd need to charge some crazy super capacitors for a VERY long time using something like this to start your average car.

[@Bearbait01]

@@internetuser8922 They could have charged Jesse's phone and called Skinny Pete though.

[@Shinigami_no_kagetatsu]

Eventually this guy’s house is gonna be powered by a 3D printed generator

[@ZantetsukenGilgamesh]

who is going to print the 3D printer... that prints the 3D printer capable of printing full houses?

[@tamari1910]

i heard that you can make it piece by piece then glue it all together to make the bigger piece, does it make sense? i cant really explain much sorry.

[@haugwen]

@@ZantetsukenGilgamesh max pfp

[@ilovefunnyamv2nd]

@@ZantetsukenGilgamesh if you want to be able to 3d print a 3d printer, you'll need the printer and print heads to be extremely accurate and precise, and able to work with many materials at variable temperatures. its just engineering challenges, not impossible

[@7XHARDER]

@@ilovefunnyamv2nd self replicating devices are amazing, check them out!

[@JinrokudaGod]

Dude literally just gave me an understanding towards Gear ratio’s timing better than Before😮

[@thomashardin911]

8:13 A satisfying pop when he pulls that regulator out of the board! 😊

[@jackmachaiek2586]

If I were stuck on a island with a 3d printer and computer I’d want to Be with this guy.

[@lucianoum1]

How convenient that situation is

[@ilovefunnyamv2nd]

unfortunately those 3d printers need power. you'd be better off with a pallete for ducttape

[@lucianoum1]

@@ilovefunnyamv2nd He can use the printer to print a battery and boom infinite power

[@JarkaKavraizhkiYoutube]

@@lucianoum1 But the printer needs power So without power, he can’t print

[@markven7875]

@@JarkaKavraizhkiKZbin then he print an batery to power it 3dprinter idiot

[@mihailazar2487]

3D printing the transmission/timing belts out of TPU is the most 9 MILLION IQ move I've ever seen

[@Max-tj7bp]

So delightfull for these inside wisdom moments one can find on youtube

[@andreaudio]

This 👆🏼👌🏼

[@bobross547]

I saw so many videos to try to explain how generators work but you did it in 40 seconds!

[@3DPrinterAcademy]

thanks Bob Ross!

[@femboyelectronics6441]

Im gonna make a simmilar thing myself I didnt need any tutorial for it however ur video is just so fun to watch like I'm just legs on the desk neck 60 degrees position rn and like it just feels good to watch it proud of you

[@butchness6980]

Me after using this charger: "My right arm is a lot stronger than my left arm"

[@capy9846]

That was always the case for me But for a different reason

[@idkm8905]

Me too,but for different reasons

[@TriekMan]

"Always has been"

[@ferreira991]

In my case the left arm.

[@CA-ev2vf]

it's your dominant hand. this is why this joke for fappers don't work.

[@fernandopks]

i love the 3d printing sound in the background. this man doing work all the time.

[@magerius]

Your alternative/direct current conversion explanation was better than my electronics teacher in college.

[@lowhigh3426]

This is going straight into the objects I need in case of nuclear explosion

[@michaelhice7636]

Yeah, it's going into my apocalypse/ omnisicopia (WH40k) playlist

[@ulysses_grant]

Found your channel by accident. So now I can say I'm loving physics by chance. Amazing work.

[@familyoddoye]

Appreciate the dedication man!!!

[@jeffw8218]

Lmfao, so “charge any usb device” really means “it can’t charge ANY usb devices”. 😂😂

[@xadev9848]

9:09 woow.. thats soo cool!! and satysfying - that sounds and "free" power and marbles😍

[@HenrikMyrhaug]

It would be cool to see this upscaled using a bike, that way you could pedal to power something.

[@insaisissable3938]

To recharge the battery of the bike when you need to.

[@HenrikMyrhaug]

@@insaisissable3938 Well, electric bikes already are made specifically to be charged while pedaling. I was thinking instead maybe he could charge a laptop or run some household appliance.

[@Max-tj7bp]

He should power his printer

[@mrnipzs7604]

I like this idea

[@peterantonaros6461]

@@HenrikMyrhaug Unfortunately it would be near impossible. At least for household appliances like a toaster for example.

[@_Lord_BoNes]

You should find a way to pump the output power into 1 of those portable chargers you can get. So you could charge the portable charger (to build up a good amp level) and then when you need it you can fast charge the phone. Basically using the portable charge as a large capacitor.

[@giroofman1141]

100 iq

[@cpK054L]

I was recommending he switch the LDO regulator (which I'm guessing that is... looks like LM7805 made by Texas Instruments.. he'd be losing power from the heat/copper loss. LDOs has around 60% efficiency? SMPS has about 90+% efficiency (or so they claim... never personally tested this)

[@jkenny1]

@@cpK054L any fast charging (9/12V) power bank should be able to handle raw voltage input up to 12V. I use mine with a solar panel that outputs around 6V, actually does a really good job extracting power from the solar panel. And I've tested the modules at around 86.5% efficiency input, 95.2% output, so cascaded it would be 83.2% as a "buffer".

[@MohammedAli-rq4df]

I learned what a full bridge rectifier is in this year, but I didn't see it being used so thank you 😊

[@cybernetix86]

Great work! The explanation is easy to understand too! Something harder than it seems.

[@rafaelthetall]

i always wonder why there isn't a pedal generator, like those of old sewing machines...

[@HazbinRotel]

That is actually a thing but it costs an ton and doubles as an workout machine

[@Smouv]

you could hook this up to a home trainer if you so wish

[@hexagon8899]

why not a pedal generator hooked up to an electric wheelchair

[@ultikillerrrr]

its not as efficient as other ways to get electrcity

[@sitfish1113]

@@ultikillerrrr True but still free power

[@justenertainmentcontent]

this video is what exactly i've been looking for, thank you 3000 for providing us a very infomative video like this, keep it up!!!!

[@martinteece8983]

Grate design and build would love see more tweaks and alike to see it charging power banks. Imagine the free energy u could make for self.

[@MattFixesStuff]

I think the trick to generate more power is mostly adding a suitable motor as generator in the end. I'm experimenting with similar setups and I found that swapping motors can help you move from 0.1 Amps and 3 Volts to 0.8 Amps And 5 Volts . The hardest parrt for me is getting the mechanical parts to hold together properly. Definitely need to experiment more with that. Oh and I also loved the "belt" you printed with TPU. such a great Idea. I have a roll of TPU here but never touched it. Seems like such a good use for it.

[@SeleneDaSnadGal]

only 3000 views? Good luck Man, you definitely have 1 mil sub potential

[@TravisFabel]

If you want to make this more practical, have it charge a set of supercapacitors. That can work as a pool to hold the energy you're creating while the phone charges off of it. The other thing I would change is to move from a hand crank that you constantly have to move to some kind of foot pedal that you can just press down release and press down because you can repeat that action without thought all day while sitting down doing something else... Similar to how sewing machines used to work before electric motors.

[@mikeratixxd7397]

I LOVED THAT ELECTROBOOM REFERENCE

[@anderssvensk4317]

You are a good teacher 👍Keep up the good work.

[@TUGGUTT]

Easiest sub you've ever earned. This channel is perfect

[@LetsPrintYT]

Nice video again! Good work! ;)

[@peterk.4266]

Beautiful project. Great science project for a PHYSICS class:)

[@SumwhatRedneck]

Im becoming an electrician cause of this man i first saw this video and im taking the courses to become one and he inspired me to do my first project

[@cesar_otoniel]

Hi!. I actually did the same thing (Just the electrical part) for my engineering project this semester at college. I think the iPhone actually requires to be feed in a sequence of values. I used a TPS2511 in my project and that did the trick. While in community college another team actually made a mains powered IPhone charger. They used a 200omh resistor with no voltage in the data lines and theirs charged but with a limit in current. I think the iPhone can draw only 200mA on with the 200omh resistor. I don't like to make spam but there is a video of it working in my channel.

[@konrad8509]

10:39 It's big brain time

[@saucybuns1860]

Absolutely loved this video! You just got a new subscriber! :)

[@mustafamehdi8126]

you, my friend, just saved a month of work

[@kevinjimoh2921]

Awesome! I think it’d be more useful though if powered by some sort of potential energy storage like a rock tied to the device by string, that way you can just wind up the rock (or weight) and have a given amount of power without having to do it manually

[@user-zw3wk7ip7s]

🤔🤔☺️☺️☺️👍👍👍

[@zach1000]

The different sized teeth are just a system optimization small difference but it does work and helps with any slightly binding spots

[@michaelgleason4791]

It's about the journey, not the destination. I dig it.

[@itsAmystery175]

I liked how he explained it. It was an interesting project.

[@dedanieldd]

For improvement, maybe add sound/light indicator that beep/blink at certain interval to indicate the optimal cranking speed

[@bubblewhales7431]

I have negative 3 iq... but you explained this in a way it actually made sense... props to you mate this was very interesting

[@alastorclark3492]

At least you don't have a -3 million IQ like all these free energy nuts in the comments

[@spray_cheese]

Something about a hand crank wireless charger is just so funny😂

[@Hakurou6636]

It looks so satisfying when you spin those gears

[@electronx5594]

*saw the thumbnail and title 'This must be a scam, it's a scam, one of the free energy again' *Taps in 'Holy shi- !!!!!'

[@favkisnexerade]

There's nothing free in eotating handle, you're spending calories through inefficient muscles, you'd better off literally burning fat than extracting energy from your muscles. These types of generators are good only if you want excercise and fill your energy storage, like install one under your desk, connect to battery or somwthing and spin it for the leg excercise, as a bonus you'll shove some energy into battery for later use. It's very fun, but as long as you're using muscles, forget about efficiency, if you really need something to generate energy and store it, get combustion engine that works off burning wood and chop a tree or something.

[@soggymanturtle]

This is amazing! Now try adding a battery storage.

[@next_gen5048]

Hu?

[@idemanddonuts]

A simple one could be a heavy flywheel added to the very last gear

[@h7opolo]

you show enough in the camera view to dissuade skepticism. subbed

[@eliandervalderen5849]

That looks like a fun do-it-yourself project. I kind of miss back when I had time to just up and do random stuff like that I wouldn't mind building one of those and having a decent battery Bank pack build it into a stationary bike so that I can exercise charge your battery bank and use the battery Bank to charge random stuff around the house like the weed wacker and my drills and stuff

[@andys4971]

Hook something like this setup to a stationary bike and you’d have a cool off grid /black mirror setup for making power

[@brickking9306]

That was a really interesting video to watch! I had also made a similar project recently but I used a DC motor as the generator because it was easier attach a USB port onto. Is there any reason why you used an AC motor instead of a DC motor? Would love to hear!

[@Tuning3434]

The classic DC motor has a commuter, adding extra friction. It would work for the application for a simple generator like this. The fancier DC motors are actually AC motors, but with a motor controller that switches poles. You can drive them on a DC current, cause the motor controller itself the voltage when a new pole is reached. The more poles, the smoother the ride. To have it working as a generator however, that motor controller has to be even fancier to a 4 quadrant controller, as it also provide braking force (e.g. the current being generated) while still moving forward in the normal direction.

[@brickking9306]

@@Tuning3434 Oh wow, totally didn't think about that... thanks for the long answer!

[@Wokx]

Yo, Love the content bro keep it up!

[@corrywhatever3516]

Cool vid! Might be good to add something like a clutch so that the flywheel can coast when the crank stops. Since you seem to be nowhere near your own limit for torque (arm strength), a shorter crank handle should give you higher RPM.

[@Mister_Stork]

I can hear a printer in your voice over 😂

[@redlightningdraws6879]

LMAO

[@santhoshpatel9360]

Gyms should have these kinda tech for thread mills Amount of power produced = discount

[@jaisere]

The problem with that is it actually wouldn't do anything, simply because a treadmill is a belt on a motor, so it's having to output energy in order for the belt to spin, if you ever try to run on a treadmill when it's off it doesn't do anything, acts the same as the floor.

[@willkwon7644]

A stationary bicycle would do the trick

[@robbiejames1540]

@@jaisere Well, most treadmills are like that, but my gym has some special curved ones that you do move by running on them, and I think they do produce electricity, though I'm not sure.

[@davidodonovan1699]

Well done sir. This is fantastic.

[@carlobelmont5629]

You are amazing man,love your videos

[@jacobryan4569]

As one wonderful man said in the 1930s "a gear is a circle of levers"

[@MinecraftRiedl]

I have some ideas for the electrical side of this contraption. As far as I can tell you use a line regulator like an LM338 right? This IC is a good start but it might not be the most efficient way. Let's assume your generator "creates" 10 volts and 200 milliamps. What a line regulator does is basically "cut off" everything above the chosen voltage (5 volts in this case) and turns it into heat (thus wasting the energy). So the output would be 5 volts 200 milliamps I would use a Step-down buck converter like an LM61495 on the DC side (or a transformer on the AC side). With this approach, you can use more of the energy because it would convert the input voltage to 5 volts and up to 400 milliamps (some losses will occur). If the voltage is higher on the input side the current would also increase. The circuit is more complex, however. Incorporating this could make your device even better!

[@3DPrinterAcademy]

good ideas!

[@markpdyson]

Sweet build!

[@netten9432]

Cool starting project would like to see u scale it up some more. . Good job with this print

[@tht1channel507]

I learned more about how electronics worked from this than from my second college physics course

[@rylenstuffsv2]

I feel like it's practical when there is a big black out And your phone battery is out so you can't used it's light And charge some reuseble batteries for the flash light

[@Mr-Trox]

You can also just buy a crank flashlight.

[@windestruct]

Imagine charging your phone, you get excited so you spin faster and your phone blows up.

[@thatmarcoguy5373]

Bro, you’re a badazz! 🤙🏼😎 Keep up the amazing work!

[@louismorgan2679]

Am I the only one who noticed very faint 3d printer noises in the background of some of the audio 😂

[@diterex]

I wonder if you could make something like the GravityLight so that you don't have to manually turn the crank.

[@mitsos306ify]

Great build, great video

[@sascharuppert3971]

As far as I understand, the effect of herringbone or helical gears running smoother than spur gears is based on that there is always at least one point where the teeth are engaged, at any angle. This would require that each tooth's end at one face of the wheel overlaps the next tooth's end on the opposite face.

[@HSKFabrications]

Well that would be a waste since iphone owners don't do manual labor..

[@startingpoint9579]

Electroboom 😂 the knowledge of that man sure gave me inspiration.

[@analitykapsychiatryczna]

i don't know why, but every think about gearbox from your show Is blowing my mind

[@crusadeknight2585]

hey man this was a nice video and this really made me smile brightly

[@kaneknoles1675]

Oh my God thank you so much this explanation of a 3 phase generator finally got them through my thick skull

[@Jrod_FPV]

awesome graphics/ animations!

[@hasan-qe3vs]

I am from Iraq. I salute you for this. You are a genius. I hope to succeed in what you are doing. You are excellent

[@DreamingBlindly]

I've designed one that can be mounted to a wall or hung on the ceiling where weight can turn the gears and a reset mechanism that pulls that eight back up once it reaches the ground. It also feeds the output to a battery that powers the resetter...

[@jpwein88]

Anyone else randomly find themselves watching the whole video while mindlessly scrolling through suggested on KZbin in school?

[@jerickodoggo9595]

I love this stuff. It takes simple concepts and produces something that mildly ... if best... interfaces with modern technology. We have evidence of the Antikythera machine, showing that the ancients DID have knowledge of gears and gear boxes. It wasn't widespread, but likely the best scholars and highest governments knew of it. It just amazes me, I watched a survivalist channel, where a guy was able to make iron from mud out of a riverbed. If you were from like 100 BCE and followed some old man hermit genius into the forest for a few days. He might be able to draw out iron and copper from the Earth. Form them into gears, making a gear box and a generator to spin. Then he could make a battery out of acid formed from rain water mixed with the sulfur in volcano domes. He could charge the battery and possibly a capacitor to shoot a bolt of lightning and strike a man dead from a distance. You would run and tell the nearest king that there is a witch in the forests doing demon magic.

[@someadvids5655]

Hi, this reminds me of the old Evil knievel wind up motor bike toy from the lait 70's! great vid chap! take care

[@samuelbudiyanto9719]

My super old grinder (from my grandpa) for traditional farming tools work just like this gear combination, and all made from metal. And from 1965 to 2021 still works great, better than power tools for durability. Spin it and sharpening tools worked! Thanks for the video 👍

[@gurel1941]

The moment i saw those diode allignments, i thought of EB and then he just appears as a reccomended channel. Poggies!!1!!11