How far can I Wirelessly Transfer Power? (Experiment) Better than at MIT?

[@mistirion4929]

Technically (if it's just about wirelessly transferring power) you could use lasers and achieve greater distances. Although the transferred power would be much lower, the distance would be much greater

[@greatscottlab]

Correct. But with my electronics background it is more about electromagnetic fields in my case.

[@a6dulsalam511]

@@greatscottlab and the laser is so direct and it could be blocked easily than electromagnetic waves ⚡

[@ShahZahid]

@@a6dulsalam511 also with a powerful laser, u have many other factors to consider like fire, blinding hazard but if u want to transmit to particular spot its the way to go and thats y many scientists think that it will be used to power spacecrafts in the future

[@imagoomanwithgoo7563]

Or a belt pulley system

[@a6dulsalam511]

@@ShahZahid That's true it's gonna be used to transmission power from the space to earth!

[@s.sradon9782]

corporation: here's a charger that's half as efficient, 4 times slower, 10 tiems more expensive and it doesnt allow you to use your phone while chargin, but it's kinda cool. everyone: **deal**

[@theodiscusgaming3909]

The power of marketing.

[@rpavlik1]

Kids can't break your phone's charging port if you aren't using a charging port.

[@evensgrey]

@@theodiscusgaming3909 None of the people behind those charging systems are good enough at marketing to get people to bite something that obviously crappy. I think most engineers they interview look at the thing they want them to build and say to themselves, "I don't want to have THIS on my resume!"

[@arthurmoore9488]

You're forgetting the most important part. Just toss your phone on a particular spot and it's charged when you're ready to use it. Wired charging is still extremely valuable, but I don't use my phone while sleeping and it's "good enough." To not have to plug in a cable every night.

[@s.sradon9782]

@@arthurmoore9488 I just have my cable organized so it takes no more effort to plug in and it stays in.

[@electroscientist4447]

great project scott I understand why you uploading frequently recently because of the stupid youtube algorithm . very sad too think that stupid nonsense video gets lots of view .and educational video didn't ... however I hope the best for you keep up your great work ... and lastly do you have any plan about drone project ?? It'll be very interesting to see stuff like that on here

[@TutorialsGuru]

Same here. Free energy is doing rounds with millions view, but Nobody carefully reads their standard 10 Science books. Sad state of affairs.

[@omniyambot9876]

Yeahh he is getting a lot less views

[@electroscientist4447]

It's very sad when you think about it Eev-vlog,electonoob , micro-raps their avarage is even lower

[@512mb4]

This remind me of a movie, idiocracy

[@leosbagoftricks3732]

Love your detailed experiments! The whole subject of wireless power strikes me as a prime example of "convenience culture" - a highly inefficient and horrendously complex idea promises to replace a 99.999% efficient $0.50 charging cable that we are just too lazy to plug in.

[@blogiblogowicz574]

you are forgetting that there is a wired charger attached to your 99.999% efficient plug (at least AC/DC conversion) - at the end of the day, if propely aligned, wireless charging isnt considerably worse (90%+)

[@Gooberslot]

@@blogiblogowicz574 Wireless charging also has an AC/DC conversion since the wireless charging transmits AC power. In fact, there's probably even more AC/DC conversions since I doubt you're running the charger directly off of mains voltage.

[@blogiblogowicz574]

@@Gooberslot correct. both have PFC + HF inverter (as in ~100kHz, dont think MHz) + rectifier. The only difference is the magnetics inbetween, which isnt as inefficient as one might think, if properly designed.

[@iskandarsyah9624]

Look at this for your wireless "charging" on steroids: kzbin.info/www/bejne/gJncoayFir9lrsk

[@blogiblogowicz574]

@@iskandarsyah9624 ahm.. as soon as I read about "overunitiy" I kinda stopped paying attention.

[@JeffGeerling]

11:17 - so... next time, then!

[@Un_Pour_Tous]

so how much was that amd video card you bought?

[@ezzeldin101]

I like Jeff videos

[@JeffGeerling]

@@Un_Pour_Tous Got it at MSRP!

[@aidan7913]

@@JeffGeerling amazing! how did you manage that?

[@512mb4]

Make a wireless pi to cook a pie then , with a timelapse

[@VladoT]

Let me tell you how they achieved this: They used the same principle used in the Yagi directional antenna which means that they put resonant coils in calculated distances before and after the actively driven coil in order to extend it's transmitting lobe forward. This is of course not shown in the pictures they published 🙂

[@ELECTROMAN_MX]

how you know that?

[@VladoT]

@@ELECTROMAN_MX Because the original experiment was created by a team in Croatia which they presented it in more detail before it was continued by the american team.

[@great__success]

exactly what I thought....high gain antennas were well known even in 60's and I am talking about MHz or even GHz frequencies

[@kanesmith8271]

@@VladoT Why are they going through the effort to conceal key knowledge like that?

[@VladoT]

@@kanesmith8271 I guess there will be commercial product soon.

[@AlienRelics]

I've been thinking about Halbach arrays and how to build an electromagnet version of this. Should be fairly simple. 3 coils, two arranged like the bottom magnets in a Halbach array. Pushes the bottom fields up, increasing the upper fields up and higher strength.

[@prashkd7684]

I wrote an IEEE paper back in 2012 on wireless energy transfer using planer transformers & our method showed far better efficiency and better control. The Key is achieving resonance between the Tx and Rx coils.

[@X-OR_]

Forgive me if my thinking is wrong here but, the output coil is kind of like a dipole, where the electric charges are equal on opposite sides. I wonder if you can use a radiator like a on a Yagi antenna to push the unused electric charges to the other side and have more output from the coil...in one direction ?

[@bobnick9892]

That's a great idea !

[@MrBrelindm]

Since electromagnetic waves radiate in all directions the power available at any point away from the source will decrease with the square of the distance. This is true for typical point sources of radiation. If however, a collimated beam can be formed then the inverse square rule becomes less of a factor while aligning the beams becomes an increasingly important factor. With a collimated beam it should be possible to wirelessly transmit power over great distances at high efficiency so long as the transmitting and receiving antennas are well aligned. I used to work for Detroit Edison as a contractor in their communications department. One of the things I did in that job was to perform routine maintenance on their several microwave links between their properties. These were microwave T-1 links that were beamed between properties with low power, very high Q parabolic dish antennas.

[@conorstewart2214]

Its not so much electromagnetic waves that are transmittting power here, it is the shifting electric and magnetic fields. The fields arent particularly easy to direct which is why transformer design is finding the optimal design that minimises losses. Wireless power transfer is pretty much just a transformer without a core at a distance, all things you want to avoid in conventional transformer design. As far as I know its not that easy to change the shape of the field into a beam or change it much at all as the field naturally makes a loop but as someone else in the comments pointed out they most likely used other coils to stretch the field out and therefore give it more range.

[@MrBrelindm]

@@conorstewart2214 you would be amazed at all of the beam forming techniques there are in designing an antenna or antenna system. And basically any "wireless" transmission is radiated from one antenna to another so in order to maximizing the efficiency of long distance power transmission, applying beam forming technology is highly advised. Having several coils stacked with one driven coil, and at least 1 reflector coil, and a couple of director coils would offer a narrow cone of directed radiation - a beam lobe. Typically the more elements in a beam antenna system, the tighter the beam lobe, higher the antenna gain, and higher the Q. Of course the higher the frequency used, the smaller the antenna design needs to be. Something like I described above would obviously be a high frequency circuit and could be set in a resin pour to maintain the optimal wavelength distance between the different types of coils (beam elements) in the antenna. Another useful area of study in antenna design (I'm a former Navy radar tech) is waveguide theory. The higher the frequency used, the easier it is to produce a collimated beam of radiation.

[@conorstewart2214]

@@MrBrelindm sorry we might just be thinking differently but it seems at least in part you are talking about antennas and beam forming like the ones used for radio transmissions which is very different from the coils used in wireless power transfer which don't transfer energy through EM waves. Beam forming and long distance transmission through EM waves is totally different and doesn't really apply to wireless power transfer. Radios send out EM waves but wireless power transfer coils don't emit particles or waves like standard antennas do.

[@MrBrelindm]

@@conorstewart2214 the coils used are identical in the video and are placed some distance apart in open air. Alternating (or pulsing direct current) is applied. It radiates and the other coil is energized. That's electromagnetic propagation between the coils. When you're talking about EM propagation, you are talking about antenna design.

[@evensgrey]

The simple kind of power transfer used in things like Qi Chargers for phones or for electric toothbrushes use direct magnetic coupling of the transmission and reception coils. Magnetic field strength (once you're at a distance from the generating current loop that is large compared to the loop size) goes as the inverse cube of distance. (Closer than that, magnetic field strength is weird, and becomes dominated by additional terms in the field equations that fall off even faster with distance. If you're at a small enough distance from the generating coil, the field is as close to uniform as you want. Generally speaking, these power transfer systems have the coils much less than their own diameter apart, so the actual fields are really complicated, but transfer power with enough efficiency to be quite useful.)

[@HoXDipannew]

You're the best 🤩👍🏻

[@greatscottlab]

You're breathtaking ;-)

[@ynzeselders4184]

Would have been interessting to see how the litz wire would compare at much higher frequencies.

[@b062838868]

incurred all of the penalties but got none of the Benefits

[@harshgandhi100]

Ventures into the unknown require sheer will. Its an inspiration to watch you.

[@plmbtired]

Love the this channel!! I have been watching for quit some and trying to teach myself alot is still an alien language but you always inspire me to learn more so one day I can understand what you were talking about.

[@greatscottlab]

You can do it!

[@dougcox835]

Just remember shat when he says something is serious he really means series.

[@WarriorRev6300]

I watched 3/4th the videos of this channel.

[@ats89117]

It seems like you should be able to improve the efficiency by placing a highly permeable sheet on the outside of the transmitter and receiver coils. Hope you will try this!

[@abhilashdutta8463]

1:09 yep a man of culture.

[@lynes2peters438]

Pls explain xd

[@Miata822]

I wonder if a parabolic reflector, perhaps from an old satellite TV system, might make the generated power more directional.

[@greatscottlab]

Hmmmmm good question

[@dougcox835]

Nope, You can't reflect or focus magnetic fields like that. You could add a ferrite core though to give the field a more directional path. But you lose the nice flat shape then.

[@Mobin92]

@@dougcox835 But then how do satellite dishes work?

[@vripscript]

@@Mobin92 microwaves are not magnetic flux

[@Miata822]

@@vripscript Aren't all radio waves simply modulated magnetic flux?

[@thelwq]

Scott, what about using a MPPT to track ideal point of the coil and thus produce maximum power?

[@Purple431]

I will definitely check out those older videos of yours! By the way... Would you ever build a plasma globe with tesla coil or just a simple flyback driver circuit?

[@greatscottlab]

Great! Eventually I can do that.

[@Purple431]

Nice

[@cap459690]

Tesla patented the pancake coil for use in high voltage high frequency power transmission, perhaps try keep the coils from overlapping, it would change overall diameter but give a greater area of effect and lessen transmission losses

[@michaelzajac5284]

I'm learning the drafting. I never see coming that "Altium designer."

[@mimimi9170]

You can use two receiver coil instead of one Because transmitter radiate bi-directional as you know. Or maybe use sphere shaped desing :) Yeah RF could be useful.

[@eren9726]

Next NIKOLATESLA is U

[@ioannisnikiforidis325]

I like your approach to problem solving in your videos, keep up the good work. Some suggestions for future IPT videos: - Try going to MHz switching frequency to maximise link efficiency (13.56 MHz is a good point overall), GaN devices can help you achieve this. - Try driving your transmitter with resonant inverters (Class E or Class EF), since they provide higher efficiency (95%+ is possible) at high frequencies and low THD . - You can get very high Q's (around 1000), by using copper plumbing tube for coils, just make sure to keep the number of turns low to minimise radiation.

[@MichalKottman]

Betteridge's law of headlines: "Any headline that ends in a question mark can be answered by the word no."

[@ericmol2614]

What's the equation for this outcome?

[@Jarmezrocks]

Hey you could try using thick gage jumper leads for jump starting cars? Cheap and thick? I would suggest de-skinning the silicone shielding and twist the wires using a drill 👍 clamp and solder each end 1 at a time

[@daque1960]

I am confused. I guess it doesn't work like my possibly faulty thinking how RF power drops off at the square of the distance. Near and far field comes into play but I am not sure how. Basically the surface area of a sphere grows with the square of the radius (A=4πr2). The part that converts it back to usable power surface area stays the same so it should drop off by the square of the distance. I guess your still in near field? I wish I knew how all the near and far field stuff works but I don't.

[@prasannapaithankar7051]

Hey. Superb video. U can try to make longer videos though.

[@greatscottlab]

This is the maximum I can do in the given production time.

[@prasannapaithankar7051]

@@greatscottlab no problem sir

[@dodge1629]

This wireless power system thing is old ... when I was I child my dad built a small AM radio that was powered by it's own antenna! It was awesome the way it works due it was using the radio signal to power on the little circuit! And tha was on 86's ....

[@jimmyb1451]

@@flexairz Received, yes. Kw transmitted. Which is why "wireless power" is such a waste of time.

[@AhmedAli-op6ng]

@@jimmyb1451 not really it is the future of EV ( TAXIS etc) search more about it. Some companies even claims and have tested it to as efficient as 94% for bulk of power more than 50 KW.

[@reverse_engineered]

That AM radio managed to recover milliwatts of power from a transmitter putting out many kilowatts. That's fine for transmitting information, but it's extremely inefficient for transmitting power. All modern radio devices (e.g. mobile phones, Wi-Fi) perform in much the same way, though often with more directed and efficient methods. But still, the receiver receives only a very small fraction of the power transmitted. The goal behind wireless power transmission is to receive a large portion of the transmitted power over a considerable distance, not just some tiny fraction of it.

[@thornbottle]

id love to see you try to power a raspberry pi zero 2 w wirelessly from under a desk. I want to have one sitting on my desk not connected to anything and just be able to move it out the way of things

[@BESTvsWORST-vx2dg]

wait.. by using a solar panel you can transmit wireless energy as far as you like... considering the inverse square law, you can use a laser to maximize the energy transmission efficiency without compromising distance.....

[@Sylvan_dB]

Finally. :)

[@maertsnosmirc]

Fantastic as always!

[@CryptonNite23]

FULL BRIDGE RECTIFIER!!!!! ElectroBoom will be proud!

[@chefboyrdee1]

May I suggest using a 2 parabolic metal disks to direct the energy. At the moment it's going in 360 when you're receiver (RX) is in front of the Transmitter (Tx). An Antenna on the Rx would also make things much more efficient and capable for long distance.

[@KennethNicholson1972]

Yes, brilliant... Needs focusing, as with a yagi antenna, at both the transmitter and reciever.

[@sociabletech2199]

This makes me think about Nikola Tesla about transferring Wireless electricity to the his whole town. We never forget him. He was a smart man.

[@AlienRelics]

Tesla did experiments with light bulbs in a field, feeding it millions of watts. I've never heard of him powering a town this way. Citation needed.

[@goliathsuperstar]

i love coming to your videos, your are amazing

[@greatscottlab]

Glad you like them!

[@TheBackyardChemist]

I usually dislike wireless power transfer proposals due to their pollution of the radio spectrum, and inducing random voltages everywhere nearby. Special uses like the toothbrush is great, but imagine how bad it would get if every apartment had a 150W transmitter in a large building!

[@curtstacy779]

lol, So all of that to tell us you are better off making it like an HF radio and antenna to transmit power wirelessly. like we have been doing since the 1800's. Your loop antenna is directional by the way. and that is what you wanted to get away from. try dipole antenna or better yet a 5/8 wave ground plane antenna will get a low elevation radiation pattern and omni directional, because you are not trying to charge things on the ceiling. a yagi in vertical orientation would work well for one direction and you can adjust the vertical angle with the number of elements. just some thoughts. Great video!

[@Kat_Pines]

When will you make a wireless charger for your laptop? Okey maybe not your gaming laptop but a portable computer/laptop nonetheless would be cool. Like a computer that is fully "wireless" or a laptop you can just set down on the desk and it charges.

[@Sylvan_dB]

Haven't finished the video yet, nor read all of the comments, but the ones I have read indicate they do not understand the inverse square law... The laws of physics are not just a suggestion.

[@alkaline3mc]

I am designing a wireless power transfer system right now and I had a lot of questions that your video answered for me. Great work and thank you for doing this!

[@transistorbrains]

If you wanted to carry this experiment further in the future, you could add variable capacitors (preferably controlled via microcontroller) and then set up tests that will sweep through frequencies and capacitances until you get your maximum power throughput for given coil specs. Should be able to create some nice graphs similar to the ones for the commercial coils.

[@americamartinez5339]

do these controlled capacitors have a special name?

[@nadimfetaih3841]

Have you seen the 5G wireless power setup? It seems SUPER promising. I don't remember who set it up, but they basically made a card to take in the 5G signal and power IoT devices. I'd love to see you break that down and try it out!

[@Dr_kashif_medico]

Great brother...soon you will make Tesla coil for your experiment 😂 it's fun to doing this with you 😌

[@bhishmakaliyuga371]

There already wireless transmission Exists... It's transmitting from millions of kilometres away..solar 😎

[@seeers0]

Thanks for the interesting video! Maybe a metal detector would be a nice project to experiment further with transmit / receive coils.

[@electroinduction1512]

The moment i got the notification I just click i was waiting for this video . your videos are the best 🔥🔥🔥🔥

[@greatscottlab]

Thank you so much 😀

[@michaelmoorrees3585]

Played with wireless power transfer decades ago. Used it on a Christmas display, I call "Propeller Santa II". Why "II" (2) ? Version 1 used brushes. Here's a video of Version II: kzbin.info/www/bejne/a3vWi2CGgM2Lmas The hub uses ~5W. Frequency: 8KHz. Yep, only 8KHz, since I used way too many turns on the coils !

[@boblewis5558]

Here is a real practical solution that should be created and tested. During lockdown my car and my wife's have barely been used. Consequently, both batteries were running down. No problem I just connected (via suitably long leads) my battery charger to both cars. Works fine, but I would keep forgetting to disconnect before setting off and although the leads would just disconnect under strain, that's not a good or practical solution. IDEA: Large diameter wireless coil power transfer - need around 60 watts of transfer at around 20 volts and use a small 3-5A buck converter circuit in the car just taking the 20 volts/3 A and providing a 14.4 volt constant voltage with a 3A current limit for trickle charging the battery. Separation would need to be around 18-20cm for most cars and up to 30cm or so for high 4x4's. Transmitter coil ideally to be mounted in the drive, under concrete, slabs or blocks but power control ideally in 100% waterproof housing with max 24 volt supply from a suitable supply in the nearest building (garage, shed, house). Anyone up for the challenge? I have so much to do in our garden and around the house already that it'll be at least another year before I can get around to designing and testing one.🤔🤔🤔

[@AlienRelics]

I have that problem, too. I've recently gone on disability (the C word) and rarely drive, so my van sits and the battery self-discharges. I'm worried if I hook up a trickle charger, I'll forget to unplug it and drive away. So I'm thinking of a wireless charger that, when the vehicle is above it for a minimum time, it rises up for better efficiency. This will also contain circuitry to detect when the engine is started and automatically lower itself.

[@michaelcasper4727]

I know how you can improve efficiency - just use 2 Yagi antennas, pointed at each other. Ham radio Yagi antennas come in different sizes and most handle 100 Watts or more. That would be the most efficient "beaming" of EM energy you can get.

[@telefon72]

But you would need much higher frequencies

[@mashilmy]

@@telefon72 yeah, but not a must. Frequency is just to speeding up the transmission, so power losses can be decreased.

[@telefon72]

@@mashilmy I would like to see someone construct an efficient Yagi antenna for these frequencies.

[@AlienRelics]

@@mashilmy ?? Higher frequency is for making the antenna smaller. A Yagi starts with a 1/2 wave dipole. Even a 2m Yagi starts with a 1m long dipole, and adds elements. You need a LOT of elements to get very directional. Therefore a large antenna. Even then, you can't really go very far. Microwaves are better for directed power, because you can build much more directional antennas at more reasonable sizes, but they are STILL very large. And must go up high and avoid any obstacles.

[@sumynona.01]

could you use a Halbach array to maximize the energy moving towards the receiver

[@durishburish]

Great work ...

[@greatscottlab]

Thank you! Cheers!

[@mintunath3919]

Hi greatscot great experiment. I already developed a WPT system a month ago that is without microcontroller and that can send power with 40% efficiency. And power up from 7.5V battery🔋/power supply. The distance I achived about 30-40mm.

[@BuzZ.]

Making an actual qi wireless phone charger would be really cool. I has to communicate with the phone/ stop transmitting if some metal gets on the charger so it doesn't work as an induction heater

[@evensgrey]

I don't think that would be too difficult. The charger base can obviously detect if there's something drawing energy from the pilot field. The obvious thing to do is put an RFID tag in the charger on the phone so the charger base can get a signal that the thing pulling energy from the charger base is a phone charger and not some random hunk of conductive material. That could even be used to identify how much power the charger base should pump out, since not all devices necessarily want the same voltage and current.

[@soranuareane]

11:18 Missed an opportunity to write "thicc" and either scribble it out or make the "c" into a "k".

[@gfsm]

The MIT has some brilliant minds and money for research... I think that it's very difficult (or almost impossible) to replicate their results with the resources that most of us have... even in the university (my case). But, as always, this was a very interesting video. I usually share them with my students and other professors at the university. Thanks for your time and dedication!

[@mikegraham7078]

I notice that not only is the MIT coil five winds instead of six, it's also evenly spaced out along a 'cylinder' rather than being a clustered bundle. Might that make a difference in forming an effective coil?

[@TheSulross]

you can wirelessly transmit power around the planet or to the interstellar Voyager space probes so long as all your intend to do with the received power is interpret it for information encoding, which that's a pretty useful application of wirelessly transmitted power

[@andyhowlett2231]

But it's extremely inefficient. When you consider the amount of power transmitted from the ground base compared to the tiny signals received at the far end (probably pico-watts or less). Even when we consider normal earth-bound broadcasting, the power at the transmitter might be 10 kW or more, but the power received at the radio set will be in microwatts or less, even just a few miles away.

[@sajidmohammad3190]

1:09 Seems GreatScott is trying to make funny contents 🤣

[@sitaramchandora3104]

Love From India 😍😍😍 Awesome Content Bro

[@alainsaffray4471]

Theses systems emites in all directions. It can be interesting to use directional antenna at emitter and receiver for concentrate the electromagnetic wave

[@Шокирующиеновости-д2с]

yeah sucks avr'r micro cant push in the mhz range

[@JawadAhmadsahibzada]

Great 👍🏼 Scott !!!

[@greatscottlab]

Thanks 👍

[@omsingharjit]

3:41 you are using Half Bridge with just single Supply so you are applying only half of the power to it instead you can improve it with Dual supply but It still can be possible with Single supply with relatively higher voltage by using Two Large Electrolyte cap in series will supply lines and Cap's center point Connected to the Centre point of Half bridge Through Load in between similar to Smps Circuit ( push-Pull Configuration . ) .

[@omsingharjit]

3:41 you are using Half Bridge with just single Supply so you are applying only half of the power to it instead you can improve it with Dual supply but It still can be possible with Single supply with relatively higher voltage by using Two Large Electrolyte cap in series will supply lines and Cap's center point Connected to the Centre point of Half bridge Through Load in between similar to Smps Circuit ( push-Pull Configuration . ) .

[@BiteYt69]

I think if nikola tesla were there with full power, we should've been learning another kind of physics, electric and energy. Still think he should've discovered a totally new way of transmitting power, we lost a legend 😔

[@userou-ig1ze]

0:38 thumbs up for the smoothness. Much smooth. very smooth. The internets approves and you can haz cheezburger, vote up and reply with meme

[@Cinemaaereo]

Please make a series of videos on how to fix PSU noise. Please.

[@konserv]

I remember battery-free crystal radio kits for kids. That's the kind of remote power transmission.

[@andyhowlett2231]

Yes it is, but the broadcasting stations us tens of kW and even just a mile away the crystal set can only provide a few mW for headphone listening, even when a long wire antenna is attached. The losses are way too high for power transmission.

[@PrajjalakChattopadhyay]

We physicists will plot the graphs, find the theoretical operating point and then experimentally fine tune the circuit around the operating point.

[@rominstone8699]

You Physicist not only plot the graphs but you plotted against Tesla and undermined his life's work to obscurity. How does it feel to be apart of something that is essentially the reason of the season Why Humanity Will Destroy Itself.

[@glasslinger]

The best way is to use microwaves. With parabolic dish antennas you can get the efficiency over dramatically more distance than with low frequency coils. We would play around with the radar units in the army and light up fluorescent tubes a kilometre away!

[@SuperheroArmorychannel]

Up the voltage to 1kv, retune your resonance and add multiple receivers in close proximity around the transmitter and you will discover that you’ve been lied to by the text books.

[@Eric-qp7rx]

I always wanted a way to transfer power through a window or glass sliding door. Ive rented apartments before that didnt have a outlet outside and i wanted to plug in a light or something. Theres nothing like that on the market but i think it would be a great idea for a product. I think the technology is there for this, someones just got to do it.

[@arnavpawar256]

Nice video!! Maybe you could clean the dust off the forgotten idea of Nikola Tesla to wirelessly transmit power all over the world with connected Tesla coils...

[@publicmail2]

Try ionizing fluorescent lights with RF at a distance. I bet this is more efficient?

[@roykositzky2252]

hey did you know that jlc is doing purple pcbs. im reprinting a keyboard pcb in purple.

[@Nedeles]

I can get behind the use of wireless power for a low power gadget, but we are not exactly on the perfect time when is aceptable to waste 60% of the power over 2 meters with "higher power" appliances, i get that is an achivement and all, but, danm what a waste of power

[@AhmedHan]

Did you measure the magnetizing current of the primary side?

[@omsingharjit]

So ... How it's useful for those peoples who ask you to make wireless charger for his phone !! Who likes to use 40 cm dia coil placed back to his phone 😃

[@malamu1417]

Alter du hast schon 1,5 Millionen Abonnenten. Herzlichen glückwunsch. Habe mir deine Videos schon reingezogen seitdem du gerade mal ein paar tausend hattest.

[@TutorialsGuru]

Basically what we can make is an RF transmitter and field strength meter.

[@kdkinen]

Only in direct proximity... Tesla knew this and designed his coil to NOT radiate power... but send it to ground or 1 wire as conductor... Collect ALL power at the receiver 1000ft or more away

[@ghlscitel6714]

"How far can I Wirelessly Transfer Power?" Infinite distance principally. Electromagnetics is a long range force.

[@fyfoh]

You just need to start with infinite squared power.

[@ghlscitel6714]

@@fyfoh Only if you want to nuke the universe.

[@origamerking6927]

is there any sort of way to make the magnetic flux be more direct towards the other coil like an antenna? if there is you should try it out!

[@HealthInsuranceSahiHai]

can you make a video about a fully functonal wireless lithium ion battery charger with a small coil like 6 to 7 cm?

[@chetronics]

About 16 years ago I was experimenting with tesla coils and managed to light an led from the other side of my apartment. The collector was a capacitive panel, not a coil. Also I remember the diode being integral for the conversion. Now I wonder if I tried it again with a faster diode what the results would be.

[@highvoltage8527]

I have made a similar experiment with 2 Tesla coils and the 2 leds where lit up at the 5m distance.

[@great__success]

sure, but at what efficiency ?

[@eideticex]

@@great__success A system with tuned coils can reach incredibly good efficiency. However you lose mobility of the end points to get there.

[@highvoltage8527]

@@great__success with my experiment it was like 8W on receiver and 30W on the transmitter.

[@ericmol2614]

A failure is a success if your learn from it.

[@Rachitkivines]

100-views only in an hour😱

[@MiiTweak]

yeah do the Tesman (N. Tesla)!!! would like to see that you research more in that field but in a useful dimension and finish that as a helpful product for human being. Rebuild the Tesla coil in a bigger dimension and research in AC power and connect it even with ground of the earth. Guess DC power got a problem with the wide distances. this is one of the important thing for the fight against the climate change. if you use the solar or wind power for free then it even doesn't matter if you only get 80% - 85% power efficiency in the beginning. after that you can tweak that. It's funny to hear when you say " waste money" because 1. you are sponsored and 2. you learned something more about that.

[@PrithwirajBose]

@GreatScott can you please make a video on how to control a AC Mains Fan with Arduino. Some projects/circuits are available on the internet where a zero-crossing-detector stage is present. If you could explain the working principle of such a circuit and why a zero crossing detector is used in your video, it will be great!!

[@procrastinatingnerd]

I've been searching for how to do what Adafruit showed in this video: watch?v=qXeUAHF2MGw I have lots of old junk electronics with inductors and leds and I could make dozens of wireless led's to run, but they give no indication of what or how the wireless transmitter is or how it works.

[@SanthoshBommadeni]

ur the best teacher i have ever seen thanks bro 😍 😍

[@TutorialsGuru]

I believe wireless power transfer is Ok upto the current close touch range only. Otherwise everything inside house will take induction, sometimes the RCC slabs too. 🤣

[@omsingharjit]

0:03 He - i said it b4 ...and again.. " Me - 🤔😊 He - " Just " Wireless Power is Awesome . Me - 😐

[@pinponelmono]

You MUST give to the antennas a "COIL" shape, every turn must be in order not as a rope one twist on top of the other , remember, as a coil, you need a perfect antenna to send and receive the signal. please make a v2 a circle of cardboard, enameled copper one twist as close as possible to the other BUT IN ORDER one side by side.

[@sanghpriyverma9845]

Please make videos on nrf24l0l as BLE

[@NithinJune]

how is your handwriting so neat?

[@sauritinfo2248]

After hours of doing college assignment, many diagrams, many graphs, and sleeplessness.........this is the video I wanted to watch....... 😀😀😀😀😀

[@AyzeLYC]

GreatScott : Why you can't set the frequency super high ? ; because it increase the resistence Me : Why you can't set the frequency super high ? ; Because you will loose more volts and amperes by setting a high frequency than setting a low frequency

[@electrochem8819]

There' a kid who made basic tesla col in Philippines that main stream media keeps claiming that this kid "invented" wireless electricity and it's booming on the Philippine news like crazy. Not salty on that kid, just pissed with their misleading news