Ultrasonic Mist Maker || DIY or Buy

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In this episode of DIY or Buy we will have a look at an ultrasonic mist maker and find out whether it makes sense to create a driver circuit for the ultrasonic piezoelectric disc. Or if we should rather just buy the commercial product instead.
Music:
2011 Lookalike by Bartlebeats
Killing Time, Kevin MacLeod (incompetech.com)

[@anthonycalia1317]

Engineering experimentation and failure are positive learning experiences, part of the process, and sometimes just plain fun. What they are never, is stupidity.

[@happyjohn1656]

Agreed! (Congratulations on the number two top comment too!... I think...) 10:47 PM 6/19/2019

[@futureisyours3016]

Ive failed at so many things, thanks for saying that. Life is worth the experiment.

[@kitecattestecke2303]

Depending under how much pressure you work on a task a failure can eat you away much more than you would think. Nowadays development departments are no kndergarden, the persons who are the loudest/aggressive/pursuing/stupidest are promoted, thus many experts who think in silence for themselves work at home in their basement or just keep calm... Depending on the middle to low management corpus, engineers suffer more ore less for less money than the con artists of management. The moment the "art" designer and economy enginer is valued higher than the "application/design/electronics engineer" who do solve the problems, you should just change workplace :-\

[@muhammadraflifebriansyah8366]

Agree, and it would be great if Scott could overcome it and make the sequel videos, thus he reviewed what is actually the problem with the project in the previous video. Then he can explain the ideal of circuit behavior and its output and also practically correct the mistaken project.

[@fritzwilhelm8258]

He was being self-deprecating.

[@EricDenny]

I love that you still produce and upload your failures! It makes me feel better about my own. I fail so hard on such simple circuit concepts sometimes, I wonder if I'm just not smart enough to be trying this stuff! You're WAY ahead of me tho so seeing you accept defeat leads me to believe it's just part of the nature of engineering in general. Just like in my programming work, sometimes its 10% design and build, 90% debugging and rebuilding. Now if I can just learn to be as cool headed as you about it! I find myself verbally and physically assaulting inanimate objects on a daily basis.

[@whothefucktookmyalias]

Don‘t know if you‘re seeing this but I really feel you. I always feel like “can’t be that hard right?” only to realize that it realistically is not that easy.

[@MaicahRu]

For your 555 time + mosfet circuit, you could have added a DC blocking capacitor in series or discharge resistor for the crystal, it's a similar problem with crystal radios that use a piezoelectric for the ear piece that received a half wave rectified signal

[@ergohack]

Nice! I've been meaning to try this myself. About the 139kHz; piezo transducers have multiple resonance modes. The 1.7MHz is fairly simple to figure out. This should work out the same way as the resonance frequency of a open cylinder. Basically, take the speed of sound in PZT ceramic, and use the disc thickness as your cylinder length. The 139kHz you saw could be the radial resonance mode. This comes from the piezoelectric material getting wider when it compresses, and is mostly controlled by the diameter of the disc.

[@ats89117]

The 140 kHz resonance is a radial resonance, while the 1.7Mhz is a thickness resonance. Only the thickness resonance will interact well with the water... As far as generating the drive signal, the simplest method would have been a Class-E amplifier. Just build up current in a small inductor and dump it into the piezoelectric device (a capacitor) at a 1.7 MHz rate...

[@3nealweber3]

I bought a mister kit and hooked up a oscilloscope to it to find the frequency of the driver, it reads a solid 114khz when it’s misting water

[@alansassler7693]

@@3nealweber3 If you can detach the transducer, you can hook it up to a NanoVNA or any other network analyzer that can measure the S11 parameter and look for the mechanical resonance frequency of the transducer (the frequency with minimum reactance). This is the frequency your mister should be running at. You will still get output at different frequencies, but running at the resonance frequency will provide more mist at the same output power. This measure isn't exactly right because the output is probably driven through a transformer and the transformer's leakage inductance should be considered, but it's close.

[@brianh.000]

Something I always tell my students : "If you are not failing, you are not learning." Fun to watch you go through all the processes you did. Thanks!

[@zigafide]

Wow the mist maker in the pumpkin looks sp00ky

[@elyesgrati]

2sp00ky4me

[@___echo___]

SPOOPY

[@aperson4075]

*SP00PY

[@vectro1535]

makes me wanna D00T

[@eden1925]

Dooty

[@scwfan08]

FULL BRIDGE REC... OH WAIT

[@robert_0505]

SCWfan06 do you watch ElectroBOOM

[@scwfan08]

RobertTunaru Is that a question?

[@thecrudelab3204]

boom, here comes the boom,... oh wait not that movie

[@pervysage3177]

Hahahahah

[@itzbenz941]

Mother of all

[@proyectosledar]

I love your peace of art xD

[@greatscottlab]

Thank you ;-)

[@luisdanielmp]

No sabía que Proyectos LED seguía a GreatScott. Que pequeño es el mundo.

[@AliYassinToma]

Proyectos LED sounds alittle bit dirty

[@gusstavv]

*peace... GreatScott pronounces it like that :P

[@sr.anderson2103]

Una leyenda frente a otra XD

[@madnessbydesign1415]

I don't see this as a failure. The goal was to see if it was cheaper to make this unit yourself or buy it. The test produced a clear answer: buy. That's a success. Well done! :)

[@BoomBrush]

Very interesting, I didnt know you could create water vapor this way.

[@adryano17a]

me, not too.

[@gusstavv]

This is how vaporizers work without boiling water

[@yashsvidixit7169]

You cannot achieve higher vapour pressure using this vibrator method than what we would get normally at that temperature. It only acts like a catalyst that speeds up the journey to equilibrium point but doesn't shift the equilibrium point.

[@PierAisa]

1.7 Mhz has to be managed with appropriate components. I suggest to use ham radio oecillator and suotable semiconductor. Maube you can salvage them from LW radios. Anyway I appreciate ypu post also failures. Thi is sign of fairless. Grazie

[@Jefferson-ly5qe]

1.7 MHz is pretty forgiving frequency to work with. Most transistors produce plenty of gain well into the VHF range

[@Speeder84XL]

Yeah, I was thinking the same - those half bridge/full bridge drivers are made for driving high frequency transformers in switching power supplies and similar stuff where much lower frequencies are used. Using 1,7 MHz for those circuits would not be very efficient - and large power MOSFETs and IGBTs made for high power are too slow to work properly at that frequency. They would probably never be fully on or off and mostly work in linear mode with huge losses and wouldn't handle much power at all. The built in "dead time" of 150-400 nS in those drivers are also needed for those, to ensure one set of transistors get enough time to turn fully off when the other turns on. For 1,7 MHz those MOSFETs are probably not the best choise ether - there are other transistors more suitable for RF (I havn't very much experience my self working with frequencies that high - most I have played with is audio circuits and power circuits, that range from DC up to about 100 kHz)

[@camilomason4560]

Pier Aisa do you speak english

[@versag3776]

Wow, All this is beyond me right now. I would probably just buy one as well. But as a hobbiest, I appreciate how you can share your failures and it seems like it must have been fun attempting to problem solve this issue with the knowledge you have! Two questions, "did anyone ever successfully do this in an affordable way?" And, "is there any way to make sure the components don't corrode?" There was some rust on your oscillator/atomizer which perhaps could have affected it's performance but what do I know.

[@danielzombori8640]

You just have to add a series capacitor to the output of the 555 timer and it will make the unipolar AC signal bipolar by supressing the DC component.

[@ashishkushwaha3812]

I was waiting for Pierce oscillator circuit design. with 1 Mhz Op amp out.

[@yellowcatcat3285]

John hutchison once showed a resonant circuit by apply a microphone as a negative feedback switch sensor near the sound source (in this case, it's the disk under water) to create disk-water complex's self-resonance. it auto adjust frequency, no need to adjust it by urself.

[@dfu1685]

I realize you were using the words Genius and stupidity as comical terms, which I enjoyed as intended! Keep it up! Your dry humor and willingness to try so many times, for our benefit, is appreciated so much and considered gracious AND Genius ⭐️⭐️⭐️⭐️⭐️

[@pieterbezuidenhout2741]

Just love an honest living being. Thanks for most interesting vids l enjoy every video.

[@akprice8242]

I always wanted to know how an infuser worked. Other videos kept telling me about how they infuse the air with scent. Finally this video explains the principle behind it. Thank you.

[@askquestions4634]

Great video! This channel deserves recognition over 99.9% of the channels on youtube.

[@karebu2]

I think everything would be a BUY. I watched your vid for 3 mins, started scrolling through and seeing tons of circuits and bits and knew it's definitely easily to buy.

[@sortofsmarter]

I appreciate the video on a failed attempt on a build. most people are to proud to show it. This is awesome. I look forward to more videos...

[@rhoddity]

What a cool series! I'd love to see even more of these! =D

[@USAlien234]

Stupidity ?! Dude you are a genius. I didnt even know half the things you were talking about, let alone come up with a circuit in my head like that. I cant even figure out how to maje simple circuits. Im still struggling to build myself an fm transmitter I found a DIY for 10 years ago. Thank you for the video, and you are the only one I know who is smart enough to figure out if it was better to build or buy this. Stay safe out there man, I'll be praying for you. ✌ ✝ ❤

[@thox892]

Quick thought, might not work: It seems to me that the problem with the first circuit is not the voltage being DC, but the piezo basically being a capacitor. It gets charged the first time the mosfet turns on, but then keeps its charge regardless of the state of the mosfet. This will keep the voltage of the negative piezo pin at ground potential, even when the mosfet is off. The first solution coming to my mind would be putting a resistor in parallel to the piezo, so it can dissipate its charge while the mosfet is off. This would pull the negative piezo pin to Vcc potential again. Alternatively, one could then connect the piezo in parallel to the mosfet instead of the restistor, which shouldn't make much of a difference.

[@antiquark6594]

'The first circuit I came up with was a true sign of my genius.'

[@deltaray3]

This video is awesome just for the theory. We have a cool mist humidifier at home and I always kinda wondered how it worked to create mist so quickly.

[@wtg2988]

Thanks GS, for going through lengths teaching us, it's greatly appreciated

[@tyronenelson9124]

The reason why the ebay mist maker works is because it contains the actual full H bridge circuitry kind of like your one that you tried that worked, seems the peizo driver needed the full push and pull ac wave (like power audio amps use) not just a push sine wave

[@peachcampanella]

I mainly watched your video to understand the science of ultrasonic diffusers versus some strange mommy blog talking about it. Thanks!

[@firefly618]

6:26 dude, I know you're hardcore, but haven't you heard of breadboards? Those white things with holes in them. They're pretty handy. Also, can't you just make a radio oscillator with a couple of plain BJT? Why all the mosfet driver shenanigans?

[@areg7182]

Yes, he does use breadboards. In almost every single one of his videos. It is just not a good idea to use one in high-frequency circuits because the parasitic capacitances. The mosfet drivers were there to turn on the mosfets on and off really fast, because you need to charge and discharge the gate quickly.

[@jaredknapp6832]

I solder stuff in mid air all the time. if its convenient, that is.

[@bryanst.martin7134]

His Pease of art. Bob Pease built some dramatic looking prototypes that way. May his legacy live long.

[@neon_one]

lol I like that segment idea "diy or buy" I just discovered this world of diy electronics stuff and have been asking myself that question a lot. This is a cool video even if you have no plan of making this thing.

[@momorefaat1379]

That is the same schematic for the wireless thingie

[@greatscottlab]

Correct

[@shahmeerlangah3868]

GreatScott! Kahan se milega

[@mechlabz2586]

you are great man.you always teach us something even if your project didn't work.respect you.

[@joshanderson1019]

i have a lot of respect for this man

[@abdul.rahim.k]

u r just "GeniuS" mahn...........!!!I really enjoy your content!!!!!!!!! 😍

[@greatscottlab]

Thanks

[@volvo09]

Don't know what I enjoy more, the content, or the awesome accent of his voice, haha!

[@hubert.unterberger]

best vid about making a humidifier with a piezo so far, I liked the explanation of how the water is evaporated! And there is nothing like stupidity by failing. „Better oops, than what if!“ Did you also try at 113kHz? Other people used piezo with this resonance frequency and it worked well. This frequency is easier to get, even with the NE555. Thanks, Hubert

[@widgity]

I did the pumpkin thing a few years ago (with a bought one)XD good fun. Currently using the transducer as an ultrasonic agitator to try and get gold nanoparticles back into suspension (because science is fun)! I've had good success with 28 nm particles, but doesn't seem to be touching 110nm. I wonder if it has to do with a mechanical resonance between the nanoparticles and the transducer frequency...

[@eitherrideordie]

Literally had the same problem, trying to figure out if there was a better way to do it, this was both interesting and helped me out a lot. thanks1

[@kaelthassunstrider4559]

0:15 how the heck didn't you burn your hands :D

[@enesilvian4640]

kael'thas sunstrider The terminator can't be burned by a candle

[@tfr]

Hi

[@bhu1334]

When I measured the driver frequency of a cheap mist maker from China I realized that they were still using 140khz signal from a mystery ic. Ive never seen they disks running at 1.7mhz

[@4DRC_]

An important thing to remember about these disks is that the impedance will be different in air vs water. In air they're basically a short at 1.7MHz, less than 1 ohm real resistance. In water the impedance goes up to about 25 ohms (both have negligible reactance). Put one on a VNA at 1.7MHz and see for yourself. Usually the advertised resistance is the in-air resistance, but if you're designing for a piezo in water design for a higher output impedance. Class E amplifier is great for this.

[@felixboian-togyik3346]

I would say that this was a cool start to a new chapter, DIY or Buy. I enjoyed the new content!

[@adminwintrec2768]

Your presentation is awesome. I use it to inspire the kids into science & technology !

[@USSBARBEL]

I don't get it... the 'Dislikes'. This is amazing, not too complicated and a very honest presentation of 'success' and failures backing up the decision. What is there to dislike?!

[@ryancl03]

there is a circuit that does in fact work out there. it uses a unique transistor that you can sub with a tip31 i believe. took a while to find it, but it does work. voltage was approx 20-30vdc to power it. if i remember correctly, it was like a russian part.

[@aantonis]

Scott writing numbers and drawing schematics on paper should be on those "most satisfying videos"

[@NoLandMandi]

that two last circuits you built, look more spooky/scary than the actual pumpkin!!!

[@eraclecogito4293]

ULTRASONIC WASHING MACHINE, just to stay in this topic, very popular , expensive to buy, but maybe cheap to DIY, from china a ultrasonic transducer is not very exprensive. Thumbs up for Scott to read!

[@devrim-oguz]

I think the project size is too big.

[@Ra-thesunking]

WHOAAAAAA!!!! 🤯we love how smart u are!!!! Thank you for showing us how the vibration creates steam.

[@EnriqueLUrcia]

yes I havea "diy or buy" video idea. A ballistic chronograph. I do archery... and I have been planning one for some time. Is one of the reasons I got interest for electronics. I can say I understand much more your videos by now. thanks for the good work.

[@larrycarter9650]

The 140 kHz mode is the planer mode of resonance (diameter of the disc). The 1.7 MHz mode is in the thickness of the disc.

[@jodymarty3179]

Not only are you very smart but you didn't make people do the SOMETIMES dumb diy stuff that is so hip these days. I see this all the time with aquarium filters. They have this great diy idea that ends up costing more then store bought and taking away more of your time. Great video.

[@keroy4588]

Idk anything about Mhz, H bridge, circuits etc. But the mist is awesome!

[@professionalandsilen]

It does not work on semen :( should i change the frequency?

[@dozog]

Make sure the connection between the balls and the piezo is tight enough.

[@shigeyuki9]

😂

[@jebu181]

Hi Scott, thank you for the awesome informative videos. I just discovered your Chanel, after watching a few videos I learned so much, I’m a beginner to electronics and don’t know much. Since you offered for some ideas, I was thinking of a necklace, or earrings, or a bracelet that would vibrate when you bring your hands close to your face. Once it goes off it would send a signal to your phone and activate an alert, or to keep a log of how many times a day you manage to activate the necklace. From this data you can see if you are changing the habit of touching your face throughout the day. This accessories are to remind people not to touch your face unless you wash your hands, this is in regards to COVID-19. I had this idea months ago, but NASA beat me to it this week, they came out with a necklace, but after watching your videos I’m sure you can take it to the next level. Thank you Scott.

[@Unboxr]

He's left handed... 🙃🙃

[@j67160]

A single transistor with 10mH inductor in parallel to the piezo (provides the negative current) would have been cheap and easy.

[@CekalaStudios]

Meanwhile... I get this in my recommended a week before Christmas... YOU'RE TEARING ME APART ALGORITHM!!

[@toysareforboys1]

I put 500 watt lightbulbs in my pumpkins. I cut the bottom out, and put them over a ceramic base. They let out "mist" automatically! Plus, the pumpkins last pretty much forever after halloween because they are completely dried out :)

[@tha-intersect4874]

Haha. That mid-air soldering is something else!!!

[@julimeryecla9552]

BUY doesn't WIN... it's just, your DIY is an EPIC FAIL😂😂😂😂

[@ladedk]

More DIY or buy, it's a brilliant concept!!

[@analiensaturn]

By experiment we learn, at your expense. Thank you.

[@DaveFer]

Hey, thanks for doing all that work and going down all those dead-end paths so my son and I don't have to. ;)

[@ethanlapenti]

First time on your channel. Loved the theory as well as the self-sarcasm.

[@ricksummerfield7260]

add a 2nd 555 as sequence switching, the 2nd 555 is 180 degrees out of phase

[@mujtabahaider5798]

you are the excellent guy I ever see in my life

[@dzsemx]

whem you made the single MOSFET version, you could do it with a simple coil in paralel with the piezo, with a few turns, tuned together with the piezo to 1.7 MHz

[@Barceque]

I would love to see you making a ultrasonic cutter from ultrasonic cleaner transducer. It cost at least 300$ ! The challenge is to tune it correctly to make it work. Old Tony failed to make one.

[@pb223]

I like this format, buy or diy. Its very interesting for me. Greetz from Germany :)

[@geenes4120]

I would like to see more DIY or BUY series

[@TMicael]

Thanks, you saved me some money. And I'm looking forward to more DIY or buy videos.

[@travispetrovich7642]

This is so cool. This channel makes me curious about so much

[@4dirt2racer0]

i kno thiss random but iv noticed theirs practically always a bunch of dislikes on these videos, theyre not really opinion related or political or anything like that... did over 200 people really go out of their way to dislike this video..Y??? pretty f*c**n ignorant if thats the case this guy has a great channel..

[@peterpiso7384]

I love watching your videos and diy projects. One question i seen you taking to bits .. Did you figure out how they ran the vape 💨 Circuit ???

[@johnholland5017]

Great, can you use ultrasonic pest deteraints?

[@eatonasher3398]

Fantastic video. THANK YOU for sharing. I love that you shared your failure. This is so valuable

[@Gooberslot]

DIY often isn't the best option from a financial point of view but it is the most fun.

[@CombsDeserts]

Learned a lot from this episode. Thanks for making it!

[@michaeldennis9863]

Why not drive a small transformer with the single MOSFET output? The transformer output would definitely be true AC. You could even do some impedance-matching (if necessary) while you're at it with careful selection of winding ratios. I enjoy your channel. Many thanks. (Edit: My apologies that some others have made similar suggestions that I did not notice until now)

[@TheUnknownCatWarrior]

I love your peace of art xD

[@FadiFadi00]

I’ve learned a lot in this video although it wasn’t a successful DIY , thanks a lot Scott , you’re really great (:

[@johnkahts7698]

Honesty is appreciated.

[@omsingharjit]

You should use bc547 type transistor

[@HabibullahNahid]

Just Wow! Share some basic about high frequency oscillator. I was trying build my own FM transmitters and failed several times. Want learn about how FM transmitters / HF Osc works.

[@tunahankaratay1523]

Try using a capacitor in series to the single mosfet circuit. This will remove the dc offset.

[@SiskinOnUTube]

I use a mobility scooter, which has an expensive controller on-board. I always fancied being able to put together a circuit that could replace the controller, should it ever fail. It's not just going back and forward, it's controlling braking, using the motor and an electromagnetic brake. You can get a little USB mist maker for a few pounds/euros.

[@rensbakker7710]

You always surprise me with your video's! Keep up the good work!

[@dannyg1195]

I can't believe you used the IR 2184 Mosfet driver?? What were you thinking?! Lol, just kidding. Most of this is over my head. Extremely fascinating though. Definitely will be checking out your other videos.

[@stephen898]

Really all your videos are great,superb and nice to play with ......nice work man super

[@1kreature]

The last schematic looks a bit class-e-ish. 555 with a Class r amplifier worked a treat for me. Doesn't track any resonance points but works well.

[@hyperkrychle]

So I bought one of these 15KV DIY electric arc kits from eBay. Now I wander if it is safe to work with. That would be an interesting video.

[@Zeddify]

using an H bridge sorta works. Changing the component values in the diagram won’t work. As it’s a crystal oscillator. An needs to be finely tuned

[@volvo09]

Excellent episode! I have been curious about those mist makers.

[@aaaaa2761]

nice video, but have a doubt. why not any LC oscillator??

[@robertosaback1426]

Dude you are awesome....and honest ! i love your piece of art =)

[@DaniMakes]

I might be thinking of something else, but can you not make a 555 use a positive and negative rail instead of just positive and ground, making an oscillator that has a 0 point crossing?

[@moritzlaszlo3115]

This was a really funny episode! I like your last try without the board, it looks like from a tecy mad max movie!

[@MCsCreations]

Really great job, man.