I found wireless LEDs - no batteries needed! in Akihabara, Tokyo
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- เผยแพร่เมื่อ 24 พ.ค. 2019
- I found these amazing wireless LEDs in Akihabara(aka Akiba) in Tokyo that light up wirelessly - with no wires or batteries! And I got them working on a standard phone wireless charger!
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#StrangeParts #Electronics #Akihabara - วิทยาศาสตร์และเทคโนโลยี
![Fc ครับ ขอแนะนำให้รู้จักกับ "น้องเปียโน" l [Nickynachat]](http://i.ytimg.com/vi/HQU6Q_IYTLo/mqdefault.jpg)
This is why I love Strange Parts! Works hard to bring us such unique content that I would have never heard of! Thank you Scotty!
yep same
True!
He probably just searched TH-cam and ripped this video off from two years ago. How To Make Wireless Electricity Transfer | DIY
by Creative Sandeep Rajbhar
@@TheDutyPaid yeah. I know . But at least he make it interesting ?
@@nezunish-898 what do you find interesting, the few minutes of soldering things together or the look around Tokyo.
I could make my grandmother's dental appointment look really interesting with footage from Japan.
How was your vacation?
Pretty good, soldered some wireless LEDs in my hotel room
lmao
Spent $500 trying to light up LEDs.
@@whollymindless Umm... that is what we all do in one way or another, isn't it?
@@whollymindless OR - he spent $500 doing research, so we don't have to spend anywhere near as much. He did us all a service.
There are copper wires it's not wireless
I challenge you to build a miniature arc reactor in a cave with a box of scraps and then implant it into your chest.
lol
This is not Cartoon bro
@@thedarkside3178 r/whoooosh
Copy cat - Ironman
@@thedarkside3178 *r/whooosh....*
7:30 The second coil should work just like the LED - they are both powered through the EM field of the first coil. I think the reason for the second coil, is that it is able to provide a mutual inductance, which is strong enough to provide extra power to the LED.
Also, I think the reason for the capacitors is to create an LC circuit so that the circuit resonates at a particular frequency, and u get max power transfer. I presume it's also there as a rectifier.
The leds work by having the coil in series with the led, and since the LED is a diode the ac gets rectified. One of the capacitors are for smoothing and the other possibly forms an lc tank, which makes for a much more efficient resonant inductive coupling
@Akash Gupta mutual inductance is when two coils interact, and a primary coil induces a emf in a secondary coil. This forms a transformer. For whatever reason the other coil is there for, it is not to «provide mutual inductance». The emf induced is also strongest in two parallel conductors, while the coils here is 90 degrees offset, which in turn means the magnetic fields does not induce much emf at all
>And I dropped it
Ah, I see you learned a lot from Linus.
He didn't kick it
@@smg950u It's a joke lol
Kento Nishi it is not. Your foot is softer than the ground, so if you drop it and put your feet, it will take a lot of the force so the hit with the hard cement is not as strong
@@qwertpoiuy430 I get that
I'm just saying it's a joke
But he didn't "segway to his sponsor"
11:30 Dude suggested less expensive cutters from his own store... now that's honest service.
Shopping in Japan is a pleasure, seriously. By and large they care about the customer experience more than anywhere else I've ever been. Prices might not be the best in the world, but they work for all the money they make in my experience.
@@zeikjt I do not know. but for me is Japan all about honor. So honor before money!
My soldering equipment and my terminal crimpers are all made in japan, like my hakko is an actual Japanese model and not a hakko usa... and theyre all some of the highest quality tools ive ever laid my hands on. The crimpers you can feel the awesome just touching them as you take it out of the packaging.
Japanese people are weirdly nice
@@hebelehubele872 not weird, different culture and upbringing. lived there for a while and its far better than people yelling, cursing and being an asshole all day.
thank you Scott, it‘s a pleasure watching you finding out how our world works! it‘s a joy! ☺️
The sheer amount of effort you put into these vids is amazing! Mad props!
The output of the coil would be AC I wonder if there were two LED chips in reverse parallel inside the original LED devices. It's also possible that if there was a capacitor on beard then it might have been in series to limit the current through the LED on each polarity change and prevent one LED from trying to sink too much current and affect the intensity of the others.
You may find the field in front of a standard RFID card/fob reader also powers the LED in your coil.
I love the typo you made " if there was a capacitor on beard" because you have probably gotten capacitors in YOUR beard in the past.
You should put some inductive powered fairy lights in your beard some day :)
@@dentakuweb whenever he comes near his bench, his beard lights up magically!
could be a LC resonant circuit too
do a video on it clive please
I’m trying to find this on eBay but “wireless led” gives me a lot of crap. Anyone have any links to them?
@3:16 "It can't be that hard, right?"
LOL
I remember in a previous video of you in a 3D printer factory in China, you said the same thing, and that company's engineer immediately started shaking his head.
I have a buddy who's a software engineer. I love tormenting him with the phrase "it's just a simple matter of software".
@@DAndyLord better yet "my grandma could type stuff faster on a keyboard as a secretary, you are not even soldering anything!" XP
@@DAndyLord As a developper, i politely despise you
we can fix it in post.
as an example of that, the white costumes in avengers: endgame are entirely cgi.
I absolutely love stuff like this!! I tear everything apart just wanting to know how it works please keep doing things like this.. plus I like knowing that I can buy the original product and not support knock offs
am going to cry this is my home town... i remember everything and every part you filmed! i want to go back haha
Those wireless LEDs: Perfect Eletric AC Magnetic field detector. That is awesome.
I remember in my country there were popular mobile phone stickers when I was in school (~15 yeas ago) that were blinking during the phone call, obviously they were doing this because of strong magnetic field because of the call. I guess that's pretty much same as this.
It wont work for all frequencies.
@@HoTTab1CHtv this thing was using batteries and only sensing for incoming calls ... radio signals are not enough to light up an LED
@@konradhryniewicki7956 What about the magnetic field from the speakers?
@@konradhryniewicki7956 Phones in the GSM band were powerful enough in the days where there were far less signal towers around. The stickers used carefully tuned antennas to pick up some of the energy transmitted by the phone.
I'm pretty sure the capacitor is used to make the circuit resonate to the frequency of the magnetic field. Thus, you can use a smaller coil, an still have high enough voltage to light up the LED
Yeah the trick with wireless charging and power delivery is to match the inductance of the source and receive coils plus managing the resonance of the receive circuit. Doing that allows you to use a much smaller receiver coil and use less power or increase the distance you can transmit power over.
In the crudest implementation the whole system is basically a tiny generator with the base station creating the changing magnetic field that induces a current in the receiver.
I came to comments section just to see if someone spotted the obvious. Resonance is the key to keep the size down and efficiency up :-)
Thus is why capacitors are needed, to form resonant circuit together with a coil.
Bigger is not always better. Sometimes you have to work smart instead of hard.
Aljaz came here for the same thing :)
Iustinian P. That’s what I thought resonance is the key factor here.
Like a resonant transmitting antenna the receiving antenna also at the same resonance will pick up much more gain (signal) 👍
@@MrRtkwe Interesting! I've build a simple "wireless LED" for student workshops (One transistor, resistor, LED, 1xAA, and large amounts of enamelled wire, 20 wraps d=4cm or so per coil), it would be nice to make a smaller version
Love your channel. You have to be one of the nicest youtubers out there...Always smiling :). Kee up the good work!
I needed a super flat profile led solution for a book I'm re-binding, and this was SOOOOOO FLAMING PERFECT. Thanks for figuring this out!!
Not magnetic field, but CHANGE in magnetic field induces the current.
Eh! Someone paid attention in physics class.
let's put science stream to good use
The changing magnetic flux linkage in the coil (due to the AC) causes a changing flux linkage in the LED coil, inducing a current in the LED :) The ferrite core helps to 'link' the field between the two coils better. As he said, it's basically a transformer. I have a physics exam soon and for once procrastinating on TH-cam has been helpful 😅
@@emishiba oh that makes sense now that you explained it. It would be cool to know how to make your own charger, and how it checks for a reciever!
@@florentin9979 Im guessing it not continuously, its just happening so fast you cant notice it off. kinda like PWM(Pulse width modulation). With PWM you can dim a led by having it off for longer and longer.
Watching his videos always inspire me to go out and tinker with something, I love the content you bring, keep it up!
Lob vainglory
Get Jesus NOW! believe, repent, be saved. Time is almost up, july 2 click my name
Million dollar idea on something I've thought about for years - wireless christmas tree lights...
Fibre tree?
@@declanphillips5996 He isn't talking about a fiber optic line
how about a Treeless christmas wires?
the problem with wireless power is it is very (and i mean very) uneffitient (e.g. a 5watt wireless phone charger needs 10watts of power from the wall)
You'd need a HELL of alot of R.F. power floating around your house to be able to power a bunch of Christmas tree LED lights.
Nice, I always enjoy your videos because those always have a Strange Part, Great
Successfully finds wireless LEDs
Fails to find a screwdriver
Sub to Pewds [19yold-army] 😂
Your profile pic is perfect for this
1st world problems...
He would have a easier time finding a supersonic screwdriver.
Tokyo is amazingly clean.
All Japan cities are clean or very clean.Because the Japanese society are very orderly and have very strong in respectful for all laws,even without any major criminals enforcements.Singapore is very clean in it cites too,but would go into chaos,if no major criminals enforcements at all times.
@@Chu3505 I admire and respect that.
@@Chu3505 except for Osaka, especially Dotonbori was quite nasty (to Japanese standards at least). Well, that might be due to the tourists. In general the country is amazingly clean.
@Cal P. How does that work? If there are no street bins won't it mean people will trow tings on the floor? Where I live we have a more or less clean city because we habe a bin next to every intersection.
@@agarceran in Japan it's frowned upon to whilst commuting on the street, you are supposed to either at a designated spot or somewhere inside
Yo that was cool. Great vid Scott! New to your channel but loving it so far!
! how cool is that!! Keep do stuff like this, i love it and it really shines thought you that you like tickering with stuff and figureing it out
That coil is just an off the shelf surface mount inductor, from the wire thickness and loops I'd guess cd75 220uh
I know right. Nothing magical or ingenious happening there.
Your channel is probably in my top 3 youtube channel priority list...........just love your videos man!!
Not #1? Shame... Lol
@Biswayan what are the other 2?
@@rajeevansathiadevan44 Pewdiepie and GMM or Linus tech tips!
@@PseudoResonance well it would be if it had more regular contents.....though I do understand that good quality videos like this requires lot of time to make, so idk man XD
Great video. I will definitely try these out in my next model kit project.
Thank you very much for this video, i just played it in 0,5 speed just to look at each shop display.. so beautiful and structured display
I absolutely love watching your adventures , you do a great job of presenting it all ..Even choice of what you film..
I love how overtime your videos keep getting better, and you keep becoming more of a serial killer in each thumbnail! Love the content man, keep it up and don't kill anyone
Hahaha i don't watch his vids but came here to see if anyone commented on the face he made in the thumbnail
You have patience and personal drive far beyond the common man or woman. Videos of yours like this one exhaust me, but I really do enjoy them still.
The walk around at yodobashi and bic camera was the most exciting part of this video
Welcome to Tokyo!
ようこそ東京へ！☺️👍
How do you manage to make every single video so interesting??? Love everyone of them, keep up the great work
This is really neat and gets me thinking of so many applications. I had to share this to some other propheads.
Scotty that was very cool. Thanks for the video!
Strange Parts is the best! Always original content! Thanks Scotty! A hug from Argentina!
Diodes like that, were very popular twenty years ago in Poland. It was like a sticker placed near phone antenna.
Indeed :) I do remember them
Same in The Netherlands!
yeah we had those in Belgium aswell. I remember everyone sticking it to their phones.. what a time :)
Over in Pakistan aswell, id assume it was more of a global thing
Oh yeah, now i remember! And i wasn't even in Poland!
Nice to see that explained and DIY tested. Keep up the good work!
Really cool, no 9 to 5 mind numbing job for you. You make my mind pop 🤯
Bro, what a fun channel! At first I was like, "Oh, almost 18 minutes. Let me try to watch it" in a reluctant manor then when it ended I was bummed there wasn't more! Awesome content! Thanks for sharing!!!
Season 2 Episode 6: Scotty learns to say "Arigato gozaimasu".
aregato gozema
I'm so rude, I keep saying "Arigato utsuse ke hito"
@@ATK. alligator Godzilla
SeaSesh 😂 omg Why is a man not being able to pronounce something so funny?
@@seasesh4073 lol
You need the capacitors for tuning the resonance frequency of the LC tank (Inductor-Capacitor tank). These wireless charging systems have a specific resonance frequency (roughly) determined by the square root over the inductance times capacitance, i.e., omega = sqrt(LC) in radians per second. By matching your LC tank of the wireless LED with the resonance frequency of the LC tank at the base, you'll get more efficient power transmission; and thus more wireless distance ;)
fun fact: similar principles are at work in radios
Now you're just showing off!
Good for you!
You into ham radio?
I don’t suppose you would have any resources about that? I was wondering how possible it would be to build one of these setups without spending $200. Perhaps a calculator tool or a good explanation of the principle?
@@jacobpalomarez5349 Did you found anything? I would like to build one too.
D35T1LL3R I was hoping for someone to tell me
i knew that. what made you think i didnt know that? everyone knows that! i mean, doesnt the electrostatic thermonator always correlate to the flux capacitor and arc reactor cosign? ahahahahah
OK, so in case I'm missing something here. The capacitors are to limit the voltage and eliminate high frequency noise from entering the chip. They act as a sort of buffer. As for the seemingly passive coil on the X-Base, I believe it works like a passive resonator or something of a feedback loop to activate the charging chip. The charger your friend was using needed the same thing. It just makes it turn on.
Great work Scotty, your name sake would be proud! Love this content, unique and always interesting.
You are such a repair nerd love your work and the way you explain it.
Scotty this was a hoot thanks for sharing your experience and trip in Japan ... I had so much fun when I was there in the Navy ... Amazing people .. thanks again ...Ed in Phoenix writes
Me and my husband made one from a thrift store using old parts. Wish I could send you a picture of it. We made it using a old speaker (from the coil) and a led (from old led glasses). It's an amazing feeling when something you make goes really well! :) Thanks for the idea :)
So if you drop one just use a wireless charger as a detector. It will light up 🤷♂️
Very good problem solving skill.
@@Nick_LS Until you realize you'll need a 100' foot extension chord to plug in the wireless charger to then search for your lost LED.
@@carmanharman3759 Plug a phone charger into a USB power bank.
Guys. Powerbank with built-in qi wireless charging pad exist for some time. Watch it at 10:12
Scotty, didn't you know that there is Hououin Kyoma's Future Gadget Lab in Akihabara, Tokyo. There you can find not only screwdriver, but even a time-machine made of microwave oven and cell-phone! :)
I'm a Steins;Gate fan too
Can this man make a bad video?
No, all because of the style of his videos...
the style makes them enjoyable as well!
Really cool love finding tech videos like this, new sub
FERRITE CHOKE! i saw it too and wanted that test so bad, SO SATISFYING
that capacitor shop was so neatly organized wow.
Capacitors are there to increase the working range (resonant circuit), kinda like a small radio receiver.
As an electronics hobbyist, I was stunned by your fascination about those LED's. But - can't say anything bad about it. Your shear desire to tinker with the stuff without knowing the theory, reminds me of myself when I was mucking around with electronics parts :)
You are such a positive dude, Scotty, I love your attitude.
thanks for coming back
Dude, I am addicted to your Videos. Thank you for putting so much work into them. Greets from Berlin, Germany.
make that a double greeting from Berlin 😀
"model robots"
fixes glasses
I think you mean GUNDAMS :^)
There were some VFs too
He says gunpla!
@@Globalnet626
this is true... the thought still tickles me tho
Saying they're all Gundam makes you the ignorant one.
Gundam is far from the only giant robot models out there you know that right?
Cool findings! I'll have to try this.
This was a surprisingly interesting video, thanks!!!
Fantastic video! Keep up the good work! Strange Parts as it's best!👏👏👏
I love these videos. They are like going on an adventure or quest to find something. AMAAAZING! Love from India
Such a great video. Scotty you are awesome.
Wahh great tips!!! Gonna be useful for final project
I had these in 2005. They would stick on mobile phone's back and light up when a call is received.
TRIΔNGLE they have battery
I did too, on my pimped out Motorola i205. But it had a strip that went between the battery & phone for power.
I had them, they don't have a battery. Their tiny LED's are powered by coils inside the stickers, activated by phone's transmitted wireless acknowledgemt packets right before receiving a phonecall/sms. It's the same effect as if you touch your phone to a speaker and hear that weird buzzing sound from speaker, right before receiving a phonecall/sms. Here's how these stickers look like: imgur🔴com/2RNtXpT.gif
Google: *mobile incoming call indicator sticker* There's still some online stores that sell them.
@@asitpurohit_108 No, they don't.
I had the clear antenna with the led in it on my
Nokia 5110 that would light up when I received a call or text
This was an very great video about the wireless LED... 9:15 that's a wicked laugh ! :p
Happy I found your channel I enjoy your video's !
the magic of electromagnetic induction. the electricity passing through the coil produces a magnetic field and that magnetic field induces an electrical current in the coil in the LED lighting it up. Pure magic.
At least a year and a half ago i told my partner i was going to try and make a completely contactless charger and she laughed at me so i moved onto something else. After seeing this i really wish i hadn't listened. Although this is not a charger i know i could have made something after watching you dude. Thank you dude for restoring the faith..respect, peace
The capacitors are to compensate the imaginary angle of the AC voltage wave, so it can become a perfect 5V 0°
Yes exactly.
By storing juice quickly and releasing it more slowly, hence rounding the square edges, to a certain degree.
No pun intended ;)
Really tho.
@@ORION444222 No, pun intended. :P
lol waveform jokes. I love you, random internet nerd!
@@I_am_a_human_not_a_commodity @DJ Moon @Galego
The TH-cam algorithm suggested I watch this so it has forced me to make this joke. Capacitors store the 'juice' therefore, capacitors are juicy.
th-cam.com/video/YIALlhlyqO4/w-d-xo.html
As a life long model builder of the mecha variety you are BLOWING MY MIND RIGHT NOW.
This is so cool. Thank you for sharing this!!!!
That's absolutely amazing.
YOU, out of everyone, don't have a pocket screwdriver!?
Crap... Then I must be a very weird person
Well... try taking it thru airport... you will be screwed
Nah, you should never leave home without a pocket screwdriver.
@@Dominus_Potatus nice
@@Dominus_Potatus I've travelled with a pocket screwdriver. The kind with the bits that live in the handle. No issues.
Maybe it's different in the US?
@@joeofloath Well... Anything point and more than specified length is forbid.
Feels Strange to see you in Japan. Hope everything is going good for you now!
Yes, things are good! Exciting times ahead:)
What happened in China?
@@pi3kun he got evicted. check his older videos
Japan is way ahead in researching in new consumers technologies goods than China.He goes where ever is new technologies are in inventions and coming out for the consumer.
@@Chu3505 Truth be told, Japan might have cooler stuff that's available in stores, but all of it is built, and therefore available, in china.
this is probably my new fav channel
Interesting video, keep up the good work man! 👍
You should have investigated and compared the maximum working range of the original stand with the Qi charger and tried to increase it.
Adam Savage would LOVE this!
Collab!
You're vids are awesome dude, you're a genius✌😁
Dude! Love this sort of fundamental electronics build project. Would be interesting for us if you shared some slides of the maths (in the video) to help us understand how you chose the coil size, capacitor value, etc.
Noisebridge misses you! Come visit!
You teach us great stuff thanks buddy
Hi, you're the top !!
You could create a smartphone cover that turns on when you charge it with RGB LEDs
How do you charge anything with RGB LEDs... Explain it...
@@tancerz77
Forgive me I explained myself wrong and I'm using google translator. The LEDs integrated in a cover light up when you wirelessly charge your smartphone. They could also turn on with the new huawei charge sharing technology. I'm already experimenting
xRay you are dumb
IT Elettronica it depends if it will flash or stay on also the gap in between the case and the charging base has to be small or there will be no power to charge.
@@TheUb3rN00b
Of course, for example, I wirelessly load my iphone x with the original case (which is very thick and rubber) and recharges well. If in the perimeter of the custiodia or in the middle a copper wire winding is inserted as an antenna, micro SMD LEDs, capacitors and resistors (the largest components at the corners) I think it works. I have transparent covers to use as a base, if you are interested I create a video and place it on my channel
In the early 2000s, almost 20 years ago, I bought a wireless LED cellphone antenna. Antennas were often external and removable. My phone was a Motorola v60ti.
I had one of those too. They sold them in the mall kiosks.
At 12:42 I saw an Amateur radio manufacturer icom logo. That was so interesting to see. I’m a licensed amateur radio operator in the U.S. and an electronics hobbyist. Love seeing that sign
Being in Japan and Tokyo and worried about wireless LED 👌🏻 How cool is that!
Dope Didnt expect this to be the video but crazy interesting 👍🏼😁😁😇
I was less interested in the inductance from base to led, and more interested in why the base had *2* coils perpendicular to each other, where one (or was it both) were disconnected from the power. Also a bit interested in how the fact that diodes are one-directional affects things based on the coils orientation in the inducing magnetic field.
I know right, how does the vertical base work if the coil isn't connected to anything? And don't coils produce AC voltage whereas LEDs need DC voltage?
@@romasromas73 Coils dont inherently induce AC no iirc. I believe the direction of current induced in receiving coil should depend on the direction of current in the transmitting coil. That means if the first coil is given a DC current, the second coil will have a DC current induced. And vice versa, if its given AC, the induced current should be AC too.
That might actually explain why the LED works no matter the orientation! If the led is receiving an induced AC current, then half of the time the diode will block it, and the other half it will go the allowed direction and light up the diode. Although iirc leds are diodes that are inclined to break when given a current in the wrong direction?
@@romasromas73 LEDs and diodes in general don't "need" DC, they just ignore the part of AC which doesn't flow the right way. A comment up here suggests to put two LEDs in reverse parallel to make the most of the incoming current.
Regarding field orientation on coils: As a literal rule of thumb, if you hold out your right hand like giving a thumbs up, align your fingers the same way the current in the coil is flowing and your thumb will show you the direction of the magnetic field lines in the middle of the coil.
With a coil that you want to induce a current in, only the part of the magnetic field that is perpendicular to the coils' plane can induce a current, which is why that thing needs two coils in order to cover most orientations.
@@feha92 the part about reverse current is somewhat correct, the LED (or diode, basically the same thing) will break if you go over the so called breakdown voltage. Below that, it will just block most of the current, letting just a tiny amount through.
항상잘보고있습니다! 자막써주시는분 너무 너무 감사합니다!!
Impressive, well done.
Yes a new video and it's awesome
How have i not subscribed to u all this long!
Hello dude .. I keep watch your adventure all the time .... And I.keep learning new things
Heeeey Scottthayy!
You should make your own powerbank for all them phones!
That'd be dope!
Awesome video man 👍🏻👍🏻👍🏻👍🏻
You just got a new subscriber
Hi from a Japan lifer !!! Love your videos. At the end of Akihabara, there is a massive model shop (I forget the name). You should have tried there.
Everywhere he walked in the video is like me on any random weekend in Akihabara....I love that place. 15 minutes by train from where I live in Edogawa ku. I am going to have to check those lights out.
Glad to see you came to visit Japan again!
Just did 50 turns of 0.1mm diameter wire around 6cm loop and a green LED. Works a treat. Better still if you put a 'phone on top, then instead of flashing, the LED stays on.
What makes me curious is that how can that mini led (which has less than 5mm in size) work? I mean, it took 6cm loop for the DIY version to work..
@@YudycaPutra I think the ferrite core of the mini one probably improves the magnetic coupling efficiency by a very large factor.
12:18 what a nice way to select parts. its what I do sometimes, visually check the component/s before I actually buy it 😀
how I wish I could visit japan someday 👍
Great video. Gotta try these LEDs at home
I think the effect being used here is called "Resonant inductive coupling". By tuning the frequency of the inductor with a capacitor you can transmit energy further and with higher efficiency to a second tuned coil then you can with a typical (Mutual) inductance.