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00:00Check out this light. It doesn't have a built-in battery, nor is it connected to anything, and yet it's
00:08illuminated, almost like magic.
00:11Well, what you're actually looking at is fully 3D wireless power delivery, and it could change the way we power
00:19and charge our devices forever.
00:21Imagine a world where everything at your desk, your keyboard, speakers, even the monitor, are powered completely wirelessly in perpetuity.
00:31No cables ever.
00:33And I don't know about you, but that's a future I would love to see, and honestly, I think we
00:38might be there.
00:39So, join me on a journey of discovery as we see just what the future of power delivery might look
00:45like as we build a truly wire-free setup
00:49where everything, and I do mean everything, is powered completely wirelessly from an invisible dome of energy.
00:58It's pretty wild.
01:00Now, it's worth noting that the method by which this works is not at all like the wireless charging pads
01:06you might be familiar with for phones,
01:08although it is very similar, so they're a great example to understand how it works.
01:13These chargers use a coil of wire to generate a magnetic field that flips in polarity thousands of times a
01:20second.
01:20Think of it like an ultra-fast spinning magnet, only with no moving parts.
01:26When another coil is placed in close proximity, this continually changing magnetic field induces an electric current within the second
01:34coil,
01:35transferring power wirelessly.
01:37This is great for phone charging pads, where the phone can be positioned precisely on top,
01:42but as it requires almost direct contact in order to work, its use cases are somewhat limited.
01:49The 3D wireless power system, however, can cover a very large area, defined by the perimeter of a single length
01:56of wire.
01:58This wire generates a magnetic field in exactly the same way as the charging pad,
02:02only it flips its polarity significantly more rapidly, millions of times per second rather than thousands.
02:09The technology also relies on being precisely tuned to resonate at this transmission frequency,
02:15allowing power to be efficiently transferred to devices anywhere within the power dome,
02:19at tightly controlled power levels to make it safe for general use.
02:23It's wireless power that just works.
02:27Now, this particular unit has been designed to be embedded within a desktop,
02:33so that's exactly what I'm going to do with mine.
02:36For my attempt at this, I'm going to use plywood as the main core of the desk,
02:40as it's pretty easy to work with, and keeps the build simple,
02:43because making compartments for components is just a case of cutting out holes with a jigsaw.
02:49The first of these is a set of cutouts for the control box and its power supply,
02:53with a shallow channel routed out for the wireless power delivery ring.
02:58This keeps it nice and straight, and as the wood doesn't interfere with the generated magnetic field,
03:03it's a great way of housing it invisibly.
03:07Before permanently covering it up, though, I do want to give the plywood a nicer appearance.
03:11My first thought was to use hardwood veneer for this,
03:14but unless you apply it perfectly, it can look a bit ropey.
03:18So instead, I'm going to be using some ash hardwood lengths that have been left over from a previous project,
03:24and I can simply glue them in place on top of the plywood.
03:28Being offcuts, they aren't the straightest, and there are a few knots and cracks,
03:32but after filling these and sanding everything down, it's just the look I like in a desk.
03:37A soft, light appearance with some rustic texture to be reminded that the wood is in fact real.
03:42I'll give it an oil to finish the surface off in a minute,
03:46but before that, there's more to do underneath.
03:49You see, making a completely wire-free computer desk would be pretty pointless
03:53if I still had a computer and all of its associated wires causing chaos around it,
03:59so my plan is to hide the computer within the desk.
04:03Thanks to the plywood building method, this is incredibly easy for me to do,
04:07as all that's needed is an additional layer with some more cutouts,
04:11mostly for wires, but there's also space for a little bi-directional cooling fan
04:15to push air over the power supplies, as they would likely overheat otherwise,
04:20what with them being about to be boxed in.
04:22To one side, you can see that I've left an area completely open,
04:26and this is for the computer itself.
04:28Yes, it's very small, and that's because I'll be using a framework mainboard,
04:33which is a full computer system built into a single board.
04:37These are really intended for upgradable and repairable laptops,
04:40but they can be specced to be pretty powerful,
04:43and thanks to their incredibly thin form factor,
04:45they're perfect for building into projects like this.
04:48And that's it.
04:49That was the easiest desk PC I've ever built.
04:54Now, for USB port access, I've added some holes on the side piece of wood,
04:59but other than that, there won't be any real indication that there's a PC inside here at all,
05:04especially once it's closed up with a bottom panel.
05:07Now, I am mounting a USB hub to the bottom here for connectivity,
05:11but as it's a bit of a bulky one,
05:13I may swap it out for a slimline version at a later date.
05:16Anyway, to keep with the rustic appearance,
05:18I'm going with some aged iron effect hairpin legs,
05:22which match it quite well and give it plenty of support.
05:24They also help to hide the mains power cable,
05:28which feeds not only the internal PC,
05:30but also the wireless power ring.
05:33Now, one of the best advantages of having used real hardwood lengths to encase the desk in
05:37is that they can be sanded down to make the corners rounded,
05:41which looks not only quite smart,
05:43but again, emphasises that it is real wood,
05:46as this kind of grain wouldn't be visible on veneer.
05:49Now, a raw wood surface would stain easily, even just with water,
05:52so to protect it, I'm adding a few coats of raw effect Osmo Oil,
05:57which has a pigment in it to prevent the wood from darkening too much after application.
06:02This is my favourite way of finishing ash,
06:05as it keeps it light and modern looking.
06:07The end result is a decent looking hardwood desk
06:10with a secret wireless power system built in.
06:15Now, this desk is actually only one aspect of this project.
06:18We still need to build the various devices that are going to be powered wirelessly from it
06:24to make, hopefully, the ultimate truly wireless PC setup.
06:28And to do this, I think the first thing we ought to do
06:30is check out the receiving rings to see just what kind of power we have to play with.
06:36Unsurprisingly, the larger these rings are,
06:38the more power they can capture from the magnetic field,
06:41up to 10 watts with the larger rings.
06:43This is quite a bit of power, considering that it's being received wirelessly.
06:48So, before we start making the different PC-related devices,
06:52let's see if there's enough power deliverable
06:55to keep a mug of coffee perpetually warm.
06:59For this, I've bought some little resistive heating pads from Amazon.
07:03When power passes through these, they heat up quite a bit,
07:06so I'm simply going to stick them to the base of a borosilicate glass mug,
07:10which has excellent heat endurance in the hopes that the heat will transfer to any liquid that's inside.
07:16To give the ring somewhere to rest, I've 3D printed a little base to hold it,
07:21which also allows the mug to be placed on top.
07:24When in the vicinity of the desk, the ring powers the pads, which start to heat up,
07:29and this is looking very promising, as you can see through this thermal camera.
07:33A lot of this heat, though, will be lost to the surrounding air,
07:36so, to make it more efficient and to make it look a bit nicer,
07:39I've 3D printed an outer shell,
07:41which can be placed over it with a little bit of sheep's wool to aid in insulation.
07:45It would obviously need to be sealed and made watertight if it were an actual product,
07:50but it will do for now as a proof of concept.
07:53Giving it a test with some boiling water, the temperature does drop away from boiling,
07:57but it stabilises in the mid-70 Celsius range,
08:01which is a temperature at the upper end of what's comfortable to drink.
08:04What's remarkable about this is that it just stays there, at this temperature.
08:10Remember, it's not plugged into anything,
08:12and as someone who likes a coffee beside me while I'm working
08:15and finds that it goes cold far too quickly normally,
08:19this is quite remarkable, and I've never seen anything quite like it.
08:23Imagine a dining table with this technology built in.
08:27It could keep your plates and mugs perpetually warm,
08:31and I feel like that would be kind of a revolutionary idea,
08:34and I don't think it presently exists.
08:36So who knows, maybe this technology will be coming to a dining table near you in the near future.
08:42But now that we've seen just what the system is capable of at the upper end of the power scale,
08:47what about the smaller rings, which obviously can't deliver as much power?
08:52The smallest of the ones I have, which is just a bit larger than a thumb,
08:56can only deliver about 100 milliwatts or so,
08:59but that's actually still plenty for another excellent use case,
09:04which is powering computer peripherals.
09:07These are almost always wireless these days,
09:10but when they run out of battery power and suddenly cut out,
09:13it can be super annoying,
09:15especially if you're doing some important work at the time.
09:18Having them perpetually powered without ever having to think about charging them would be a dream.
09:24A dream that's about to become a reality.
09:27You see, as the smaller rings regulate their power to 5 volts,
09:31a USB-C connector can simply be soldered to the output
09:35and the whole thing housed inside a little 3D printed case.
09:39This can then just be literally plugged in.
09:42And that's it.
09:44The keyboard sees the voltage and starts charging immediately.
09:48No wires required.
09:50The power provided far exceeds the energy use of the keyboard,
09:54so even though it's not much power overall,
09:57it will never need any other source of power.
09:59Ever.
10:00Having the dongle stick out like this doesn't look amazing, though,
10:04and while it does work with the mouse in just the same way,
10:07a better option would be to have it mounted internally.
10:10This mouse is a perfect guinea pig, or maybe mouse pig,
10:14as its PCB ends before reaching the back of the casing,
10:17leaving a perfect area for the receiver ring.
10:20Before mounting it in place, though, I'm going to remove the battery.
10:23You see, it's becoming very popular to have extremely lightweight mice these days,
10:28and shaving even the 10 grams that this battery weighs off its overall weight
10:32will make a dramatic difference for high-end eSports titles in particular.
10:37As the ring itself barely weighs anything,
10:40we've gone from a 55-gram mouse to a quite remarkable 46-gram mouse,
10:45with a mod that actually improves its usability thanks to it never needing to be charged.
10:50It just works when it's on the desk.
10:53Very, very nice indeed.
10:54Indeed, this feels like the future.
10:57Now, we're only just scratching the surface of what's possible here with computer peripherals,
11:02because the medium rings, which are a step up, can deliver almost a watt each.
11:07And a watt is actually quite a lot when it comes to audio,
11:11so it's got me thinking,
11:12can we make a set of truly wireless stereo speakers?
11:17Hmm, let's find out.
11:19Wireless Bluetooth speakers are, of course, incredibly common,
11:23and while we could just modify one to have a receiving ring built into it,
11:27we'd be missing out on an opportunity to make an independent pair of speakers
11:31that utilize true wireless stereo, also known as TWS.
11:37TWS allows two Bluetooth audio boards to talk to one another
11:41and synchronize their stereo reproduction,
11:43allowing each to play either the left or right channel without introducing delay issues.
11:49My chain to make it work is as follows.
11:51Two medium-sized power receiving rings for about one and a half watts of power delivery,
11:57followed by a power filter board to reduce any interference noise from them,
12:01a true wireless stereo Bluetooth board,
12:03amplifier,
12:04and then finally the speaker itself.
12:07Now, I've found in previous projects that 3D printing is actually quite practical
12:11for making enclosures for speakers,
12:13so that's what I've done here,
12:15with plenty of internal trussing to reduce panel resonance.
12:18It's quite a simple design,
12:20but as the drivers themselves are quite high quality,
12:23they should sound pretty decent.
12:26Once everything is stuffed inside,
12:28with a little sheep's wool to reduce internal reflections,
12:30they can be closed up,
12:32essentially completing these 3D printed speakers.
12:35They could look a lot nicer aesthetically though,
12:38so it's time to get creative with some external materials
12:40to hide the fact that they're 3D printed.
12:43Despite my reticence to use it earlier,
12:46veneer is actually a really good option for small parts like this,
12:49as it's easier to get right,
12:51and after trimming and oiling,
12:53it looks quite convincingly like a wooden piece.
12:56The sides though still remain very obviously 3D printed,
13:01so to hide these as well,
13:02we can use an equally simple but effective technique,
13:06textured vinyl wallpaper.
13:08This can simply be stuck around the perimeter,
13:10and it's remarkable just what kind of difference it makes.
13:14Now, being oval shaped,
13:16they don't stand up very well on their own,
13:18so the plan is to screw on some speaker spikes,
13:21which, along with some edging trim,
13:23finish off the speakers beautifully.
13:26For such simple speakers, they do look quite nice,
13:29but how do they sound?
13:30Well, placing them within the Power Dome,
13:33they immediately connect to one another and the PC,
13:36and sound decent for their size.
13:46So, our setup is really starting to come together now.
13:50We've got our wireless mouse and keyboard,
13:51as well as a set of pretty decent,
13:54truly wireless stereo speakers.
13:57But, what about a microphone?
14:00You see, microphones are actually notoriously bad
14:02for getting messy pretty quickly.
14:05You've got the interface,
14:06its power supply,
14:07the microphone cable,
14:08and unless you're really careful,
14:09it can get pretty tangled.
14:10But, if we make a wireless one,
14:12all of those issues just suddenly go away.
14:15The key is,
14:16can we make one that's high enough of a quality
14:18to be useful in a studio environment?
14:21So, powering our microphone is going to be easy.
14:24We already have the power of receiving rings,
14:27and one of them will be more than enough for what we need.
14:30However, how are we going to handle the audio transmission?
14:33Bluetooth audio isn't going to be suitable here,
14:36because of the latency that it introduces.
14:38But, thankfully,
14:39a lot of low-cost audio transmitters
14:42have become available the past few years,
14:44and they could be just what we need.
14:46These use a direct 2.4 GHz connection,
14:49so don't exhibit any delay or sync issues,
14:52unlike Bluetooth-based microphones,
14:53and so have great potential for good quality audio.
14:57Being cheap, they almost always sound awful, though,
15:01and this is because they use really bad microphones and preamps,
15:05wasting the otherwise good wireless protocol
15:08that they use for audio transmission.
15:11Thankfully, though,
15:12these two components are the easiest components to upgrade.
15:16You see, most microphones in devices like this
15:18are of the permanently polarized electorate variety,
15:22and much higher quality capsules are available
15:24at many different sizes,
15:26some of which are absolutely massive.
15:30Larger capsules like this have better noise performance
15:33and overall audio dynamics,
15:35and as they have the same underlying technology,
15:37they are essentially drop-in replacements.
15:40To help it along, though,
15:42I'm adding a better quality preamp
15:44to boost the audio before it enters the transmitter unit,
15:47which takes the load off the poor quality internal preamp,
15:50drastically reducing its background hiss.
15:52The intention here is to have these boards mounted above a power ring
15:57in a little 3D-printed platform.
15:59But instead of including the capsule on top here,
16:02I'm going to extend its mounting position quite far upwards
16:06with a thin acrylic tube.
16:08This lifts the capsule closer to the source of the sound,
16:11which will be a voice in this instance,
16:13as proximity is very important for capturing clean audio.
16:16It does pick up a lot of desk and handling noises, though,
16:20so to fix this,
16:21I'm going to build a little shock mount for it.
16:23What I've come up with for this
16:25is a little frame made of 3D-printed parts
16:27from which I can suspend the capsule with elastic.
16:30The elastic prevents any vibrations
16:33from being able to reach the capsule itself,
16:35and another benefit of the frame for it
16:37is that it can double as a plosive shield
16:40to protect the microphone capsule
16:41from any distortion caused by talking too closely to it.
16:45It's somewhat unusual looking for a microphone,
16:48but it is extremely practical.
16:50It can be placed directly in front of a user,
16:53and as the capsule itself is held very close,
16:55it makes for a fantastic sounding output.
16:59So, it certainly looks the part,
17:01but how does it sound?
17:03Well, this entire segment has actually been narrated on it,
17:06and you can be the judge of its quality
17:08versus the other segments
17:10which were narrated on my high-end,
17:13expensive microphone and interface,
17:14so I'll be having some buyer's remorse
17:16if you guys think it sounds the same.
17:19But either way, I'd say the setup is complete now,
17:21but you guys might be looking at the elephant in the room
17:24and saying,
17:24Matt, what about the monitor?
17:26You'll have seen this throughout the video,
17:29as I installed it on a standard support arm earlier,
17:32with two wires going to it,
17:35one for power and one for the video signal.
17:38These wires kind of go against the spirit
17:40of a truly wire-free setup though,
17:42so let's see if we can do something about it.
17:45Thinking somewhat out of the box,
17:47ideally I'd like to have this floating above the desk,
17:50perhaps suspended with some sort of transparent cord
17:52so that it's almost like a hologram,
17:54but as I don't have a power ring large enough
17:57to capture the required power
17:59at this distance from the desk surface,
18:01I've settled for building a couple of rings
18:04into a custom stand instead.
18:06This provides plenty of power for the monitor,
18:09which can receive its signal
18:10through a little wireless HDMI dongle pair,
18:13the other end of which goes into the computer
18:15so it can receive its signal over the air.
18:18It's very cool to have it able to be positioned
18:20anywhere on the desk without any wires at all,
18:23but as I do really want to make it floating one day,
18:26I will keep experimenting and release a YouTube short on it
18:28if I get it working.
18:30But for now, the truly wireless desk setup is complete.
18:35Everything here, the speakers, microphone,
18:37even the heated mug,
18:39they never need any other source of power.
18:42They just work elegantly, wirelessly.
18:46Now this is a clean setup.
18:49One major downside of this system, though,
18:52is that it's actually really difficult
18:53to integrate some devices with it.
18:56The most major one, I think, being smartphones.
18:59You see, sufficiently dense PCBs
19:01prevent the receiving rings
19:03from being able to collect power
19:04from the magnetic field.
19:06So it's not possible to simply mount one
19:08to the back of a phone.
19:09It would need quite a bit of development
19:11to integrate one properly.
19:13You could totally make a phone case, though,
19:15that holds some far enough away.
19:17And with some of the larger rings,
19:19you could get pretty decent charging rates
19:21when the case is open on a desk like this.
19:24Another thing to note is that
19:25while the efficiency is overall pretty good,
19:28there is about a 10W base power load.
19:30So if you're powering just a keyboard and mouse,
19:33it would be somewhat wasteful.
19:35I'm sure that this could be tuned down
19:37to match specific use cases, though,
19:39so it would be cool to see
19:40some kind of universal desk mat, for example,
19:42that provides power to peripherals
19:44using this technology.
19:46With that all said,
19:47what would you like to see wirelessly powered,
19:50even if it's super niche
19:52and far removed from the items
19:54that I've introduced in this video?
19:56The reason why I ask
19:58is because although the wireless power unit
20:00isn't available for widespread purchase just yet,
20:03it is available as an evaluation kit,
20:06which is technically what mine is.
20:07And if you have a killer idea
20:09that you'd like to prototype,
20:10you should be able to purchase one
20:12from the company
20:13if you send them an email.
20:15I've placed a link in the description
20:16with more information,
20:18as well as a forum thread
20:19if you'd like to share your own ideas
20:21and download the individual files
20:23for all of the items
20:24that we've built in this video,
20:26some of which you could easily integrate
20:28into being USB powered if you wanted to.
20:31So I hope you've enjoyed
20:33seeing what the future of power delivery might hold.
20:36If you haven't already,
20:37don't forget to subscribe.
20:38But other than that,
20:40I'm Matt,
20:41you've been watching DIY Perks,
20:42and I hope to see you next time.
20:44Goodbye for now.