I found wireless LEDs - no batteries needed! in Akihabara, Tokyo
Вставка
- Опубліковано 3 сер 2024
- 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!
See behind the scenes of Strange Parts and what's going on in between videos:
/ strangepartscom
/ strangeparts_com
/ strangepartscom
Music:
Put It Down - Da Tooby (Licensed through bit.ly/epidemic-sp)
Tulip by VESHZA (Licensed through bit.ly/artlist-sp)
Far Away Star - Lishuid (Licensed through bit.ly/epidemic-sp)
Earl Grey - Dylan Sitts (Licensed through bit.ly/epidemic-sp)
Edited by auram - / aurxm
#StrangeParts #Electronics #Akihabara - Наука та технологія
>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"
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....*
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.
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 UA-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.
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.
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
am going to cry this is my home town... i remember everything and every part you filmed! i want to go back haha
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.
The sheer amount of effort you put into these vids is amazing! Mad props!
thank you Scott, it‘s a pleasure watching you finding out how our world works! it‘s a joy! ☺️
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.
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.
Humanity is one step closer to have "Bluetooth cordless water hose".
Um that would be revolutionary.
The Great Eldian Empire lol
It's called a penis
Shut up and take my money!
@@Personal-rc7cy Not so simple like you say, but, yes, we already have it.
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
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 UA-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.
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
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
Can this man make a bad video?
No, all because of the style of his videos...
the style makes them enjoyable as well!
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
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
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.
The walk around at yodobashi and bic camera was the most exciting part of this video
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.
"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?
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!!
I also had wireless LED with my old nokia mobile ... I guess i had a futuristic childhood...😅
i also used to have one attached to the top cover of my Nokia 3310, it lights up when getting calls. seems like our childhood was indeed futuristic.
Omg concept was of Nicola tesla in 1940s of wireless transmission of electricity now both moblie n mobile lights are powered by his princple
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
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.
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'm guessing these are two big capacitors"
*puts hand in supposed big capacitors*
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
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
Nobody:
Strange parts: im going to end xbase's whole career
I made a similar coil and LED some time ago to confirm that the NFC reader on my phone was actually putting out a power pulse...
! 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
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!
Welcome to Tokyo!
ようこそ東京へ！☺️👍
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 🤯
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
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
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.
Heeeey Scottthayy!
You should make your own powerbank for all them phones!
That'd be dope!
I absolutely love watching your adventures , you do a great job of presenting it all ..Even choice of what you film..
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
Great video. I will definitely try these out in my next model kit project.
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
Adam Savage would LOVE this!
Collab!
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 UA-cam algorithm suggested I watch this so it has forced me to make this joke. Capacitors store the 'juice' therefore, capacitors are juicy.
ua-cam.com/video/YIALlhlyqO4/v-deo.html
The world : i just invented this ! This is spectacular invention ! This will disrupt all technology
Japanese : founded years ago and selling to gundam hobbyists
I think you mean "gunplahh"
Power republic is a small Chinese company.
Love your channel. You have to be one of the nicest youtubers out there...Always smiling :). Kee up the good work!
that capacitor shop was so neatly organized wow.
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!!!
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.
Tesla would cringe if he knew how little steps we have made with his invention
because its really inefficient have you heard of the inverse square law
@@MrWizardjr9 Tesla was already working on directional wireless transmission of power. Its where power could be delivered to a point over huge distances.
Displays, all i have to say.
@falchulk So you heard about Flinstones already? Cool.
@Thor Odinson lol! Yeah, but a brilliant nut job...
How do you manage to make every single video so interesting??? Love everyone of them, keep up the great work
You are such a repair nerd love your work and the way you explain it.
This is really neat and gets me thinking of so many applications. I had to share this to some other propheads.
FERRITE CHOKE! i saw it too and wanted that test so bad, SO SATISFYING
Great work Scotty, your name sake would be proud! Love this content, unique and always interesting.
That's absolutely amazing.
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 :)
Strange Parts is the best! Always original content! Thanks Scotty! A hug from Argentina!
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
Finally somebody catch an idea to put a coil with a LED together :))
This is so cool. Thank you for sharing this!!!!
As a life long model builder of the mecha variety you are BLOWING MY MIND RIGHT NOW.
Nobody:
Nikola Tesla: SMH
lul
If only Tesla understood the inverse square law... it would have saved himself so much trouble
😂 "Things you aren't supposed to do in a hotel room", said no one, ever!
why doesnt he travel with a mini toolkit? seeing that 90% of his vids are all tech building
I guess because he can stretch his videos by adding footage of him buying tools?
He could have even had a sponsor Ifixit toolkit.
Mini 6 his videos are over 15 min all the time a small clip of him buying tools won’t do anything
@@FBI-yd6co he spent a whole minute on it in this video... Still unnecessary padding
yea, little tool kit and a ts100 soldering iron.
2:37 "maybe this is a failed product"
Huawei phone pops up in the background
i do not see failed product
Patent pending†
† not our patent‡
‡ not even about the same product, there's just a patent pending somewhere for something
Fun fact, Japanese scientist is the one that discovered BLUE LED, which change the entire LED world which now produce white light we all enjoy so much.
@@CuongNguyen-le5ic fun fact, filipino created *LED*
@@theofratus1 You mean Nick Holonyak, which had both parent from Ukraine. He himself is an American who worked for General Electric lab.
@@theofratus1 You should youtube or Google about BLUE LED. Such an invention that change everything we know, including most light sources we are using now.
I just wanted to leave a post letting skylark Murphy she’s very pretty
this is probably my new fav channel
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.
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.
to maximise the output you want to tune the LC circuit to the qi charger frequency
I'm guessing that's what the capacitors are for.
This was a surprisingly interesting video, thanks!!!
dude i was at the same hotel the last year! makes me so nostalgic :')
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 !
There are several LEGO lighting kits that use this technology. Look at i-brix dot com they are the most popular kits.
Oh wow, I literally just posted about this as I've only seen Lego kits that use wires!
Ooo, nice... www.i-brix.com/
I'm not sure if you've seen stickers that lights up when someone is calling.
Scotty that was very cool. Thanks for the video!
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.
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.
about 20 year ago i remeber these stickers that you can glue to back on your phone, and it blinked when calling or receiving txt message. Taked energy from phones radiowaves. pretty cool huh?
Ismo Laitela I remember those. I had never understood it until today from reading your comment
Hello dude .. I keep watch your adventure all the time .... And I.keep learning new things
All LED's are wireless with AC and a high enough voltage
Josh Koelker nope they usually fru themself
All people are LEDs with AC and a high enough voltage
@@nightmareinaction629 you can put a ton more power into them if you supercool them in something like liquid nitrogen. That might allow for such a solution.
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.
4:08
>Okay i didnt expect some serious anime otaku action going on in there
Considering you are in akihabara, how did you expect something other than that?
Video tip (sort of). In late 2015 or early 2016 when I bought my iPhone 6s I immediately put it in a LifeProof case (waterproof), then I added a lanyard, hung it around my neck. By summer 2016 when I went to Japan, I'd already been told by at least 250 middle schoolers that my iPhone on a lanyard 'looked really stupid'. I'll admit it did. When I got back from Japan I'd just snap back, "I climbed mountains in Japan with this phone, no problem. How many broken screens have you had?" (At least 1/3rd of all smartphones in the possession of middle schoolers have cracked screens). Your visit to Yodobashi reminded me that when I was in Tokyo with my son I had him take my photo in the middle of their phone-case/accessories department. You know it, at least 4000 square feet, jammed packed. In 2016 there were three waterproof baggies on lanyards for electronics, but nothing like what I had. In the past two years at least one lanyard has appeared on Amazon (the bands that attach it however clip the corners of the screen). Yesterday my girlfriend showed me some fancy lanyard--but it wasn't called a lanyard, it had some other name and a >US$100 price tag.
I know. This is all so obvious. I'm not looking for credit, I'm wondering why did it take so long?? For years not one cover/case/?? in the AppleStore had an attachment point of any sort.
I did take my iPhone out of the case/lanyard for 4 days. The headphone dongle went bad (I buy these in groups now and then stiffen them up with silicone tape and heat shrinkable tubing), so I took it out so I could use the headphone jack. Dropped it less than 18 inches. £100 to get the screen replaced. Which only proves my bootleg.
My current 'state of the art' lanyard consists of two thin dyneema line loops hot glued to the back of the case and parachute cord tied to them. The LifeProof cases wear out, in four years I've had 3-4 of them (the screen protectors ALL get a scratch right in the middle within the first week).
A video idea might be to share this idea with Shenzhen and see if anyone wants to go into business making lanyards for smart phones. (This is not a business proposal, like your iPhone 7 PCB, this is free). Are lanyards for smart phones a practical solution? (Maybe I'm wrong). If so is there resistance to the idea, is it just because they are not available so almost no one considers them? Is it practical or style that has kept them from finding users? (Tip for the video: the Apple black against white silhouette with the phone dangling and both hands of the figure doing something else. Or a silhouette riding a bicycle one-handed while holding the phone in the other, then reaching up to tap or swipe-- the image tumbles, there's a crashing sound.)
Another one of these bootleg fixes is strain relief on cables. I pretty much wrap silicone tape or use heat shrinkable tubing on all my cables. Why are cables such crap?
i remember back in late 90s Nokia cell phone switched with custom LED antenna.
ah the one that we stick behind our phone 😅, thats how strong cellular networks i think. and if we put same things in today's smartphone i think it will be always turn on since our smartphone now is always connected and pulling data from networks
Man, I had to pay $500 to get choked in a hotel room.
Elliot Taylor wut?
We call that prostitution
Stop in the of law
Happy ending
Glad you found the Power Jack On....I'd have thought you were in the wrong store having found Power Jack Off! 0_0
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
Tony Stark built this in a cave ....WITH A BOX OF SCRAPS!
But they were Stark scraps!
🤣
RIP . :(
@@exil3dlivecom um… spoiler alert…
*"I think this might just be an off the shelf rebranding..."*
PUROTTO NO FUTO-SA!!!
I have done something similar in college, this video made me smile ear to ear it hurts
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.
so they did what Nikola Tesla 100 years ago but with LEDs
yep, with far less power and distance capability
no, he was using the earth as a ground and all his things were connected to the ground some way
@@AsbestosMuffins... yeah and his real name was David Bowie
@@AsbestosMuffins Nope that was for his Magnifying Transmitter but for standard transmission/reception of wireless A.C. power there's no need for a "ground" just the coils which have a primary and secondary winding ;)
Yet the the inverse square law was its downfall.