Producing lots of Manmade Energy! Bike Generator Upgrade!

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In this video we will be once again having a look at my bike generator and upgrade it with the help of the feedback from my viewers. That means I will add a belt tensioner to the system, try out a different kind of alternator as well as a washing machine motor. And in the end I will be able to produce a decent amount of power on my own. 200W to be specific! Let's get started!
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Music:
2011 Lookalike by Bartlebeats
0:00 Bike Generator Upgrade overview
0:55 Intro
1:48 Improvement 1: Gear
3:07 Improvement 2: Belt Tensioner
5:54 Improvement 3: One Wire Alternator
7:57 Improvement 4: Washing Machine Motor
10:03 Verdict

[@Squiffel]

Ok. Now add the flywheel. I won't get bored of this series until you run out of ways to optimize it XD

[@giridharkumar6813]

🤣🤣🤣

[@firstidontknow8478]

That's actually a great idea!!!

[@lexicase5642]

@j fill lol yeah there’s no such thing as a free lunch so to speak, if you pay for food to eat, then go work it off pedaling this, you’re essentially paying for power at the grocery store. That would be an interesting conversion, food to kWh cost 😅

[@NicholasLittlejohn]

@@lexicase5642 There's a tax case where a cyclist delivery person was able to deduct meals.

[@ve2vfd]

Yup, the momentum of a big heavy flywheel instead of the bike's back wheel would probably make keeping a constant speed easier. My exercise bike has a 45lbs steel flywheel and it just wants to keep spinning. Add to that the rear wheel's 5 gears cassette and a working derailleur and you can compensate the weight of the flywheel by gradually speeding up.

[@Dante4F8]

1.Make compact and add RGB. 2.Rent to gyms and sell the energy produced. 3.Profit.

[@Fifsson_]

RGB type: upgrade rarity:rare +10% power to everything with the upgrade applied

[@ronald2042]

I think many gyms already have this

[@OldLukes]

@@ronald2042 No. All the bikes in Gyms have friction based pedaling resistance. Noone is havesting Energy from their customers xD

[@timburger4754]

@@OldLukes I beg to differ. We do this, life fitness offers this system

[@ThePunischer1000]

@@OldLukes Absolutely wrong. Most modern gyms have electronic loads ie motors but they don’t „harvest“ the energy to put it back into the power grid the bikes just Power themselves.

[@watsok]

Want more power? Lower losses in the generator chain by using bike chain vs Vbelts. Vbelts depend on friction to work, chain does not. Many decades of experimentation for reduced loss has gone into bicycles. Move the alternator closer and make extend the bike chain to it.

[@colejohnson66]

If they’re worse than chains at energy transfer, why are they a thing?

[@captainheat2314]

@@colejohnson66 vbelts are cheaper and manufacts sell them more

[@69iqtutorial]

@@colejohnson66 they are better because they are smoother and cheaper as well

[@69iqtutorial]

@@colejohnson66 and easier to produce

[@Ed.R]

@@colejohnson66 Maintenance free just replace when worn. Chains need constant lubrication to last well.

[@camielnijpels]

You could make the idler pulley crowned so the belt centers itself on the crown of the pulley.

[@rafaneka]

that and a narrower frame with the springs on the outside would work better

[@stormthrush37]

Very interesting DIY project, looking forward to seeing more of this. A thought occurs: a much more niche use for this. Instead of thinking of it in terms of providing all your household energy, thinking of it in terms of a combination of a backup power system for a green energy system and a means to deal with cabin fever during winter; a means to get some exercise indoors on a cold, cloudy winter's day while simultaneously having something to show for that work by recharging a low battery bank that's hasn't been getting recharged sufficiently from the connected solar panels that haven't been getting enough sun. Something like this might work for me; I don't need tons of electricity in winter, mostly just enough for a laptop, a cell phone, and lights.

[@akshanshkmr]

Not gonna lie, I had to lower the volume in the first couple of seconds 😂😂

[@PCbolt17]

True AF 🤣🤣

[@greatscottlab]

Well.....do not close your eyes and just listen to the sound.

[@arifqurbanov2159]

Yea man askdjhs

[@sangrambhumia9320]

Are bhai bhai bhai 😂

[@emir4707]

lmao

[@juanherreros4761]

That tensor is not strong enough, a fixed tensor is much preferred than a low loaded sprint, in the old times all cars had manual tensors for example. Also, would be muuuch better to put the alternator closer to the wheel, and reduce the belt length as much as possible. Since 20 years ago, car alternators are equiped with an special pulley called clutch pulley, that only allows turning in one direction, this way, the variable counter resistance of the alternator shaft is atenued, and also helps to keep the rotational speed more stable when the rotational torque source is not constant (this is particularly useful with small diesel engines, as it's combustion is very "aggressive" and produce kinda sinusoidal functions, from the torque output point of view)

[@eideticex]

Sounds about right. On older cars I usually have to tension the belts using a 2ft crowbar to load it with enough tension to avoid slippage or jumping.

[@ishankantbehera1875]

@@eideticex amazing Drone experiments must watch and subscribe please 🙏

[@LeonardGreenpaw]

Ya, I think he was reluctant by some of the comments saying it was going to increase resistance. like ya, technically, but by a very small amount if you use a good bearing, the benefits outweigh the losses.

[@mike-rayner-videos]

i love how you persevered.. you are honest and real.. you have my respect and very well done ❤️

[@dejanjankovic9765]

A crude wind turbine with an asynchronous generator would be a neat project!

[@BillGreenAZ]

Wind turbines are engineered for this very thing. It's why i couldn't understand why so many suggested an automobile alternator. I plan to use a wind turbine motor for my power output. I will connect the shaft of the turbine directly to the bicycle wheel.

[@AccountInactive]

I would love more "off grid" style electrical projects. I've been tinkering with a gravity battery that uses gear reduction and a slowly falling mass to turn a generator but I seem to be somewhat alone in this. All types of scavenging and repurposing of junk is super useful information in my post apocalyptic fantasy world 😁

[@jasonbrown467]

i plan on doing this. i do not know much about mechanical engineering, but i know i have 32 120ah lead acid batteries that i bought last year for my solar system and it seems like once they are done storing chemical energy i could use them as weight in a gravity system that can generate electrical power. use the sun to pick them up during the day, then let them fall back down to create electrical energy. i dont know where to begin but its in the back of my head. i think a battery will still be needed. to power switches, gears, sensors etc etc. might need a 10 story elevator shaft size vertical corridor and 2000 lbs all in one spot as one mass, rather than what i envisioned in my basement with many smaller systems lifting and dropping the weights.

[@melkel2010]

Use a big tank of water. It fills up at the top and spills when it reaches the bottom. Empty it can now be easily lifted back up to the top by an opposite tank of water that has become filled. The pulley that powers the alternator also mechanically powers the pulley that is rotating the tracks for the tanks, like a water wheel.

[@eugeneputin1858]

You will be sorely disappointed when you find out the mass/height youll need to make this a reality for anything useful.

[@jayvinstreet1876]

Okay Great Scott, I see you with the PS5 👀

[@rarespopescu240]

Im pretty sure he made it himself

[@therealfox]

Ps5 fanboi

[@ebrocoliphoto]

well Jeremy is also a gamer

[@hotasianstepsister3039]

the ps5 will shut down if he stops pedaling!

[@jdpantoja442]

Noway! x:D

[@jdmjesus6103]

Great result! If you want to improve the tensioner, a simple way would be to have it on a lever arm with a single pivot and a spring, instead of floating in the 2 slots. That way the orientation would be steady.

[@Adrian2140]

This. This is how they do it on cars but I think he would need to upgrade to a proper metal frame. The wood is simply not that sturdy and I bet he's losing a lot of energy from the vibrations / lack of everything properly centered.

[@kaboom083]

Congratulations on the effort of building this. I was really surprised in the previous video where you simply stated the power of the alternator at 1440W and somehow expected that it is possible for you to generate that? Because it is YOU who drives the generator. Conservation of energy and cyclists knowledge. Cycling Analytics has a great statistics article on "cycling power output" where you can see that a sustainable power output can range from 150-400W depending if you could qualify to win the next tour de France :) I would say don't expect much more than 200W long term (2h). Most people can achieve highest long term energy output at pedaling cadence of 70-80rpm and their heart rate below 150bpm. Good luck and enjoy the exercise ;)

[@slimhazard]

All I needed to see was the intro to click the like button. The Great One had some fun this time.

[@greatscottlab]

It was a lot of work but also fun experiments :-)

[@JjMn1000]

Yes

[@dreamlifter7569]

My parents👀👀

[@daffster13]

My mother in law has been trying to talk me into setting up something like this because she saw someone doing it in Jamaica. I now have the data I need to convince her, that unless she wants to power the bike herself, it ain't happening. Thank you for your time and insight bro. Love your videos

[@YodaWhat]

Pro Tips: Add permanent magnets to the alternator rotor, in the gaps between the field fingers, to reduce or eliminate the need to waste power on the field windings. Use the middle speeds on the bicycle, where there is little or no sideways deflection on the chain to cause extra friction. Use the smallest drive belt you can find, both the width and the thickness, because you are never going to be transferring more than 500 watts (500 newton-meters per second) and much of the power is in the form of high speed rather than large force. And a 1 or 2-kg flywheel of plain flat steel at the alternator, and a larger battery, able to soak up more charging current at 12 volts.

[@Tarkov.]

This makes me really appreciate how good solar panels are.

[@andriusst]

My thoughts exactly. For the price of bike and alternator you can buy at least 500w of new solar panels. And probably 1kw of used second hand

[@johnwyman6126]

And Micro Hydro power which used to use Automotive alternators, but people got sick of changing the brushes every few months to a year, so they started using brushless alternators. Energy Systems and design, motenergy, and also Harris hydroelectric uses them.

[@CRneu]

@@johnwyman6126 lots of micro hydro systems use washing machines. these systems run for 5+ years constantly.

[@TheWanderingLynx]

Turning the rear bike wheel into a flywheel would help with consistency when pedaling, it will take a little to start it going (move through the gears low to high) and it should make a big difference.

[@link12313]

He could also only turn on the exciter coil once he is at full speed to make starting it easier.

[@rogerrabbit7469]

I actually tried that. I purchased a Caterpillar flywheel which weighed 85 lbs I went to a machine shop and for $250 they attached a rear wheel bicycle sprocket to it.. so I replaced the regular back wheel and added this new monster flywheel to it...it took effort to start but once going I could coast and power appliances for various seconds depending on the load and was less fatigued. Heavy flywheels make the difference

[@WisconsinEric]

The suspension of the bike is wasting power too. Bikes without suspension are far more efficient on the streets, and in this video you can see the suspension flexing. Wasted power.

[@melkel2010]

@@rogerrabbit7469 I'm glad you did this and also shared it. I'm thinking of a build using two flywheels with two clutches each: One clutch controls when you are feeding its flywheel, and the other clutch controls the flywheel feeding the alternator or motor. Then alternate the flywheels. While one flywheel feeds the alternator, you can be feeding the other flywheel. Maybe if you can build that, and I know it's going to be involved, but hopefully I'll run into you again and see how it worked.

[@johngoard8272]

I have got to admire your tenacity in developing this project and I do like some of your logic when it comes to solving even the smallest of problems.

[@zone04010]

In 2014, 2 French KZbinrs made such a bike generator. To do so, they used a 36V DC motor as a generator, and friction wheel as the link between the motor and the backwheel of the bike. They reached a peak of more than 500W with this setup. Maybe have a look at this ! The name of the channel is "Incroyables expériences" They do not have a lot of videos on the channel, so finding a 2014 video is still really easy.

[@andreykldjian]

I've been enjoying this series. Just to get a little bit more out of the alternator, try to make the alternator pulley as small as possible. This should give you the maximum RPM on the alternator. If you really want to go crazy, you can do a 2 belt system with the bicycle tire reducing to a small pulley, which in turn would be attached to a larger pulley. The larger pulley would have a second belt to the alternator. I'm sure you understand the benefit i'm describing. This seems very fun.

[@mikeymike437]

The torque would get way too high for him to be comfortably paddling...

[@kenmore01]

Or, go with a tandem bike and get someone to help! 😁

[@joeledwards6587]

@Mikey Mike I agree, torque would be way beyond what someone can sustain peddling. Though if we could get a heavy flywheel into the setup that should also help to even out the variances, much like a capacitor smooths output before a load. The whole structure would likely need to be redesigned out of metal though, as a heavy flywheel carries a massive amount of energy so don't want that flying away. I also feel like the extra belts and pulleys and whatnot are all adding too much resistance for the legs, perhaps a chain like the bike's own would be better suited to reducing losses. Overall though that's a much bigger project, one I'd love to see though @GreatScott! maybe there's someone like @ColinFurze in Germany that can help you fabricate?

[@imperialsecuritybureau6037]

@@joeledwards6587 yep, that would be “The Post Apocalyptic Inventor”, look him up! He even did a documentary on fellow inventors and fabricators in Berlin, and would fit the bill perfectly.

[@NicholasLittlejohn]

Flywheel as wheel

[@maks886]

When I'm watching GreatScott alone: *does normal electronics stuff* When I'm watching GreatScott and my parents come in: 0:00

[@karthikps3892]

😂😂😂

[@avinashranjan9197]

😂😂😂😂10000

[@itzefatabruhh1701]

Fcking legend

[@kashif-momin]

😂

[@dreamlifter7569]

😅

[@spacewolfjr]

Awesome video, I love when KZbinrs respond to suggestions and improve their projects. Thanks!

[@Delali]

I've always loved how you investigate your builds to find alternate solutions. Also how you integrate your findings into your final solutions to make a complete build. You're awesome. I learn alot from your channel for mine.

[@greatscottlab]

Glad you enjoy it!

[@Delali]

@@greatscottlab Oh i really do brother.

[@init_yeah]

This is actually a great way to get power while exercising

[@TheCompyshop]

I think a great way to improve this setup is by looking more closely at off the shelf automotive parts. The belt tensioner for example can be replaced by an automotive one which has much lower rolling resistance. Also moving the bike closer to the alternator would be ideal, or even finding a way to mount the alternator onto the bike with some welded on metal brackets and a good automotive tensioner would really make the setup more efficient. You could also look into making the ribbed pulley on the alternator smaller so that it spins much faster. There are also higher output alternators on medium duty trucks. Pickup trucks have 200amp alternators and they are fairly low cost. Would make for a pretty nice upgrade for the 120amp unit you have! I love this series, please keep trying to make it better!

[@bzqp2]

Great video format! I've never witnessed a better demonstration of the creative power of the YT comments! (with Wintergatan being close in a few cases).

[@drakedorosh9332]

Way to stimulate interaction. I look forward to part three when you explain how an alternator is designed to respond to load.

[@ast1527]

Awesome mate, really nice. We used to have that tiny lightbulb in the dash on the older cars and the battery drained fast if that bulb would die. Cheers!

[@JensHeuschkel]

Now it would be nice if you create a arduino mppt tracker to find the best exciter current for your setup :)

[@spagamoto]

Don't even need a current shunt, just use a mic and record how loud he yells while pedaling! Anyone remember the SparkFun treadmill?

[@dannmarks]

This was really helpful. A friend is trying to setup a simple in stream generator for his cabin.

[@jonnporter6081]

When you print the pulleys, print the outsides a little taller, thus, making the inside track a little deeper. That may help with the belt coming off until you get the tensioner set correctly. Great video.

[@lexicase5642]

@greatscott I used a fisher and paykel smart drive washing machine motor, paired with a 15amp 3 phase rectifier and high voltage(500voc) mppt solar controller and was able to make a peak of 700w with my pedal powered bike, and around 300w quite comfortably. These motors are permanent magnet type 3 phase motor/generators and are commonly used for diy wind turbines.

[@ownerkits3079]

Hi Lexi, sorry for my ignorance. But is that enough to charge some large lithium batteries to then use a 12v inverter ? Would love to see your setup if you don’t mind sharing

[@unclegreybeard3969]

I still think you can get better results (higher RPM) by deleting the belt, rig the alternator so that it is directly driven by physical contact with the tyre. Then the whole thing could be upgraded by adding more alternators as needed evenly spaced around the wheel.

[@mokeymokeybling]

Happy to see a video utilizing an universalmoter/reihenschlussmotor. I would really enjoy a video where you show how much force such motors produce in the lower rpm range.

[@3v068]

YESSSSS!!!! Glad you were able to make this project a success!!!!

[@lohikarhu734]

A slight convexity of the roller would also provide a self-tracking tendency to the tensioner

[@Oxytropis1]

This

[@cncrampage]

Try to use some ebike eletric motor, they usually have magnets inside, could be a great alternative

[@Rouverius]

How did I miss this one? Loving the Iterative design process.

[@jacobh8299]

I would like to see you use the alternator as a wind turbine. I love your videos. Thank you so much.

[@wolfiebo2209]

I'd be interested to see how much power you're losing through the suspension. Every time you pedal there's a large amount of vertical and horizontal movement which will be lowering efficiency.

[@DuudSimon]

ive noticed when i tried this a while back, that you can make the secondary windings self excite with high enough rpm without a battery attatched.

[@draemalic]

Great videos for your budget, keep them coming. You can use a chain and add teeth to the rotor on whatever electrical generator you choose. That will eliminate slipping. You can also use a series of gear changes between the bike and the electrical generator to increase RPM at the electrical generator at the desired AMP level. You can also add a flywheel to store rotational energy to make it easier at speed to maintain a constant rate of pedaling. Time to learn how to weld my friend, zip ties are not going to cut it. Thank you so much for the videos, you are inspiring.

[@watup110875]

Awesome job as always

[@pavletrnic1433]

I love everything about him other the fact he keeps his ps5 horizontaly

[@holgerwikingsen713]

That should be illegal.

[@WyllCavalcante]

🤣🤣🤣 My first contact with advanced engineering/electronic/electric… And descendent of a language that i want to learn… 🇩🇪!!! So inspiring! Keep it up!!! 👊💪🏼

[@phinok.m.628]

The fact that you can regulate the strength of the (not permanent) magnets inside the alternator is not a bug, it's a feature. There is no "right" exciter current. Any normal permanent magnet generator is basically like an alternator with some fixed exciter current. Why not be creative? You can build a little Arduino controlled setup that regulates the exciter current to keep the speed constant. That way you have no resistance while speeding up and then if you pedal harder the alternator applies more resistance and produces more power, if you pedal less hard it applies less resistance and produces less power. If you want a simpler solution, you could also add a way to control the current while riding the bike (like a gear shifter). The possibilities are endless.

[@ProposeleSS]

well, there is a way to optimise exciter current. this is done by measuring phase angle between output voltage and current. when there is no difference ( cos(phi) equals to 1) there is no reactive power. this is done on the industrial scale. it would be easy to implement with some arduino code

[@endemiller5463]

Would MPPT solar charge controller do this?

[@1900OP]

@@ProposeleSS You're mistaken, there is no reactive power here. What you refer to is synchronous generators connected to a 3 phase network, you can have your generator take reactive power or supply reactive power to the network to balance the power factor, but that happens because the excitation current can set the EMF voltage at the output of the generator to be below, equal, or higher than the line voltage. Here the output is rectified, and it's DC.

[@diogo9016]

Ótima idéia. Vou correr atrás de um alternador de carro para fazer um. Assim faço exercícios também.

[@Anne--Marie]

Your explanations are as good as Jeremy Fielding's. With different content, I am learning from you both. Thank you!

[@patrickmaris]

Eyy got a job at a electronics store in the Netherlands. They sell almost everything. From small components to electronic appliances (Good to learn from)

[@lpt2606]

1) you are doing a fantastic job at promoting hahaha 2) what is the store's name? groetjes uit belgie

[@colejohnson66]

We used to have that in the US: RadioShack and Fry’s Electronics. Sadly, it’s more profitable to sell things other than electronic components. Such as phones and appliances.

[@patrickmaris]

@@lpt2606 okaphone electronica

[@patrickmaris]

@@colejohnson66 yeah, we see that the hobby as in electronics is kinda heading downwards. That's why we also took other things in stock.

[@patrickmaris]

@@colejohnson66 we also see that the people are coming less to our store physically and more people buy from our webshop

[@negril_rasta]

Next time plz use a 1000w dc bike motor 😁 Or a 400w low rpm wind turbine motor

[@diymonk6002]

Some people are inspired by you, one day I thought, why I can't do something like you? then I started my little experiments here I just reveal my tiny talent. this is that DIY MONK

[@mohammedabrarahmed3299]

Hey Scott. Nice to see you. Seeing you for the first time since I watch your videos

[@RadioFreeRich]

Have you considered adding a flywheel? The mass of the flywheel may help maintain RPM at the higher current levels.

[@MegaSteamfreak]

200W casually lying around on the top of the expensive lab equipment....

[@smk666]

Also that chain slack at 8:00. Dude, unlock that derailleur arm...

[@steveblayer342]

I have just tried a overboard wheel placed on the bike wheel it worked perfectly .

[@ZaneDaMagicPufferDragon]

Great update on your bike generator!!!

[@zentrobi1548]

Hmmm couldn't he just use a fly-wheel to make the rotation stable when it regulates its self only downside should be that its abit harder to start untill the wheel is up to speed

[@ericblenner-hassett3945]

Next step, make 4 of them and open a cycling class to power your place.

[@LeonardGreenpaw]

0:32 OMG THAT'S ME! AHHHHH that feeling you get when sempai notices you XD

[@01Hudesohn]

Nice Project.

[@sanveersookdawe]

That's not bad at all if you only have to peddle 1.43 years for 1 year worth of power from simply paddling on a bicycle. That's pretty crazy actually

[@PeterMilanovski]

But when you think about it, that is based on his current Electric bill, and it's only that much because we are all used to just plugging in stuff and not worrying about how much electricity we use! I think that if he began to look at what he can replace with something more efficient, he will cut down on his bill and the figure of 1.43 year's will come down!

[@rubabmubarrat]

scott other days: does normal Electronics stuff *scott when my Parents come: **0:00*

[@lipelego22]

awesome video man, really experimenting with generators, this answer a lot of mine doubts about DIY power generation

[@therandomguy7738]

Wow start was pretty epic😂😂

[@Christian.987]

"Dad i wanna to watch television!" "A minutes honey i get ready to workout first"

[@dr.palsonp.h.d815]

that tension rig was the worst way to do it. all you needed was a pully with two long nuts and a mounting plate...

[@johnnyhammersticks1695]

Also the pulley should have a wider radius in the center than the edges. It keeps the belt centered and prevents the belt from slipping off. Steve mould has a video about it kzbin.info/www/bejne/in_Yq5xjn7KLpbs

[@dr.palsonp.h.d815]

@@johnnyhammersticks1695 yea that makes sense, or it could have wider radius of edges and a deeper groove..

[@Dante4F8]

@@dr.palsonp.h.d815 you dont need a a bigger radius on the edges, watch the video it is quite on point

[@quadracycle4000]

Yep, now the entire maker's side of youtube is FLOODED with this comment. Crown pulleys always; Steve Mould says so!

[@jdmjesus6103]

Well just mounting the pulley on a sprung lever would be the simplest way.

[@californiakayaker]

Another idea for you. If you take a piece of that type of belt and glue it to the bike wheel, you then can place the alternator belt inside those tracks and reduce any inclination for the belt to go side to side ! ! ! The unit might have a use for some of the sailors when they are in particualy foggy areas as they sometimes are relying on solar panels and their engines. But, if they are in the middle of the ocean, they can't afford to waste the diesel . So, they just sit there, needing something to do, and little by little losing all of their battery power. And, at the same time, gaining weight and being bored.

[@RCAVDH]

Great video, thanks for sharing!

[@euleausberlin]

add a crypto miner to the output and you get paid for doing workout :D

[@Kevin-jz9bg]

XD or inverter and feed it to the grid

[@ancapftw9113]

Mining generally only earns a bit above the cost of electricity. So, say that's $0.15 per kWh. 200 watts for one hour would be .2kwh, or 3 cents of crypto. Doable, but not the best. He should probably just put a halfbarrell VAWT on it to turn it and leave it outside.

[@iceefrags8770]

@@ancapftw9113 if hes generating 200w constant, you can power a basic, 1 GPU Ethereum rig using say an RTX 3060 ti. the GPU pulls 120W when mining and the wimpy CPU and RAM would pull like 50-60 ish if you optimize for power usage and get like an intel atom cpu or something. mining with the RTX 3060ti for 1 hour at 60MH/s would net you, $0.19/hr

[@MichaelSantos-ru3bb]

4:31 those bearings seem like they are almost seized.

[@BlackWolf42-]

he beat the heck out of them with a hammer. They're woofed.

[@officer_baitlyn]

prob undersized the holes on the 3d print a bit too much

[@TheSimpsoys]

He definitely bent something because wailing on the middle of it with a hammer that's how NOT to press in a bearing lol

[@JoeGP]

@@officer_baitlyn i really doubt the plastic pulley had enough strength to squeeze the metal ball bearing housing so tight it would seize it, but who knows.

[@ATSystems]

Another best project from my favourite youtuber.congrats for that and keep up the good work👍👍😊😊😊

[@greatscottlab]

Thank you so much 😀

[@ATSystems]

@@greatscottlab Welcome😊😊

[@my3dprintedlife]

Its a great day with Great Scott!

[@greatscottlab]

Thanks

[@ipodfernando]

You could get a better output with a bike hub motor or a hover board motor too, also a permanent magnet wash machine motor as well, they are all pretty much the same…

[@martinlabuda117]

The 1,4 years of workout for the year of electricity was best moment.

[@johnwyman6126]

Motorcycle alternators are permanent magnet alternators and are much more efficient. A similar but larger version can be had from direct drive washing machines that don't have belts. Mostly front loaders these days, older ones were top loading Fisher and Paykel.

[@gameyord7182]

Finally y wanted to see this proyect finished

[@nothing-mm8ui]

Power a pc with it and put the monitor and keyboard in front of the bike so you can play minecraft. Just think about it, you get exercise while saving on electricity while playing games.

[@matejbrezan6887]

wouldn’t it be better to use bldc motor ? maybe even fitting the bike with hub motor

[@jonclement]

some builds put the BLDC right into the back of a smart trainer setup on the hub. so sounds like a good idea

[@jimurrata6785]

That is a very nice looking auto-transformer you have @ 9:00 ! 👍

[@dosgos]

Improved performance by an order of magnitude! That is good crowd sourced intelligence.

[@muhammadjibrael3649]

My old memories 1990s i did use car selfsetarting moter for this purpose and got more power.. thanks

[@wadeh486]

I was hoping you broke the laws of energy creation... 200w is awesome thou

[@greatscottlab]

Thanks😁

[@Richardincancale]

@@greatscottlab How much power does the exciter take (W), you need to subtract that from the headline power output figure? Hopefully less than 200W ;-)

[@YourArmsGone]

A treadmill motor works really well. Nearly all of them are brushed DC motors so there is no need to worry about exciter current or supplying power at startup.

[@edmardupreez8742]

Imagin having 20 of these in a gym that has spinning classes all day. Could make some good free power

[@mich29sm]

And use 'smart contract' to attract customers. More often they visiting your gym, the more they generate, the cheaper monthly membership!

[@gabrielgomescunha]

Your "carpentry" skills are in need of a little upgrade 😂

[@eugenefrancisco1029]

Don't say that He can make it better but that's only for the test.

[@dr.palsonp.h.d815]

lol true, that tension rig was the pretty dumb

[@someguy2741]

You need to tie the output to the exciter so it self excites. That is how all alternators work. Essentially this is what you did with the one wire version. You can also buy an external regulator with you first version. That regulator has a screw to set the output. You could then let the alternator self excite by hooking the output to the field. Then you could put a knob on the external regulator... or you could like the output to allow reasonable peddling.

[@colejohnson66]

After tying the output to the input, just remove the belt. *F R E E E N E R G Y*

[@someguy2741]

@@colejohnson66 lol

[@someguy2741]

@@colejohnson66 Dont do that. The alternator will run faster and faster and faster until it rips a hole in time and the entire universe is sucked through it.

[@DrJALAGHARI]

Great. Wonderful video with nice explanation and implementation of the idea.

[@marynunn1708]

Lots of lost energy in both the belt friction and the alternator’s cooling fan. Suggest ditching the rear rim and mounting chain driven hoverboard motor where the rear axle is. If the motor RPM isnt high enough, may need to insert an intermediate shaft. Great video and project. Love your scientific approach!

[@aarkln]

Scrap everything, use a hub motor, replace the bicycle rear wheel with it.

[@NicholasLittlejohn]

The inverse of an ebike

[@rohanpawar1603]

Hire someone who loves pedaling 😁😁

[@jensuwesander]

nice bike mr. great scott

[@sh0t3dNL]

Great video! I think you slightly misunderstood the 'replace with washing machine motor'-part: newer washing machines come fitted with a BLDC motor. Efficiency++

[@poothrowingape]

How do peoples support material come off so clean? Whenever I use supports they leave scars behind after being removed. What settings are people using!?

[@londonnight937]

modify the settings in your slicer so that the distance between the support and the piece is greater. Experiment in 0.2mm increments.

[@mr.unknown1386]

Making energy and burning calories!

[@BlackWolf42-]

Converting energy and burning calories!

[@nick86i]

Maybe you can add a flywheel, improve the tensioner so that you can tension it once and then fix it in place (using some screws) and use a bearing for less friction, add some (super)capacitors, a buck/boost converter for stabilizing the voltage, some batteries with BMS, an usb-C charger, an energy counter that shows how much kWh were produced, etc (end of thinking capacity) :D

[@mr.unknown1386]

Brilliant experiment! Now I know how to charge batteries if the electric grid goes down.

[@LewisUpperton]

Honestly 200W is pretty impressive, and likely the most you could really expect to get out of this system. Professional cyclists, for example, can supposedly generate in the order of 400W (based on a minute of research), so 200W seems like a pretty respectable result. About the only improvements you could make to the system are in reliability and consistency instead.

[@epicpl6376]

400W is there FTP which means, they can hold it continiously. While sprinting, a professional cyclist can paddle over 1000W for a few seconds to minutes.

[@321ooo123]

400W is what they are able to generate using the body's aerobic system, which means they are able to hold at that power level for hours. Peak power levels (using anaerobic system) are above 1kW. Even an amateur can sustain 1000W for a couple of seconds.

[@sethsbikehacks2730]

This channel got 1000% better when he started talking to the camera.

[@KamranKhan-co6ox]

I can see the changes in the thumbnail Scott 😄. Keep it up!

[@b4urEnvy]

Such an entertaining channel, nice work great scott