author
3Instructables250,427Views228CommentsBristol, UKJoined August 29th, 2016
Build your own cutting-edge devices coming directly from the research lab. Ultrasonics, electromagnetism and more. Researcher at Bristol University interested in Ultrasound and in general any effect that waves can produce.

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Arduino Contest 2016
Contest Winner First Prize in the Arduino Contest 2016
Make It Fly! Contest 2017
Contest Winner First Prize in the Make It Fly! Contest 2017
First Time Authors Contest 2016
Contest Winner Second Prize in the First Time Authors Contest 2016
Sci-Fi Contest 2016
Contest Winner First Prize in the Sci-Fi Contest 2016
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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator18 hours ago
    Acoustic Levitator

    That is really good work Max. If you enjoyed the project, soon we will publish similar Instructables. Next one will be a directional speaker or also called audio spotlight.

    If you are using an Arduino clone (totally recommendable since they are only 3$) you will need to install the drivers that are mentioned in the Instructables. When you plugin the arduino you also need to select nano (or the one you are using) and the correct COM.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator4 days ago
    Acoustic Levitator

    I wish I could find more efficient transducers but it seems easier to increase the voltage of the excitation signal.The best option would be to find a tiny transformer with a ratio of 1:2 or 1:4. Otherwise just use a l293d combined with a boost converter to get more voltage: XL6009 are quite small and cheap in Amazon.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator8 days ago
    Acoustic Levitator

    That is great. Do you mind if I add the link in the Instructables?

    I run those things at 10V for some time and usually it is fine but when you want to put 20V (with the BigLev) I usually have a dual driver or attach a big metal heatsink to the original. But your replacement is much neater.

    For styrofoam you can probable use just 6V, it still gets hot with that?In any case, it is amazing to know that it can run for 1 week.

    The driver amplifies the signals from the arduino (which are only 5V). You can move the objects up/down by changing the phase of the bottom relative to the top, that displaces the nodes. Best.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array8 days ago
    Ultrasonic Array

    Hi Ryan, do you need to move the droplet in 3D?If up/down is enough for you, this project is cheaper, stronger an simpler: https://www.instructables.com/id/Acoustic-Levitator/

    TinyLev only needs 2 signals because the focusing is achieved by the position, and the orientation.In the Ultrasonic Array, you control the phase of each transducer, this permits to focus dynamically.In Figure 3 http://aip.scitation.org/doi/full/10.1063/1.4989995 they are compared.Also this video may be useful to understand the differences between electronic phase control and distance phase control: https://www.youtube.com/watch?v=ixXaCD5bf0I

    Hi Tommy,The pin number is like this: https://drive.google.com/file/d/0B3wpLYs5lc3xc3BqZmFReEFZejQ/view?usp=sharingBear in mind that some numbers are missing since some ports from the Arduino are not fully used. Basically, the idea is to use the tinyDevice to do the channel assignment semi-automatically.I agree that is quite messy when you just want a flat array. I had schematics and code for a 16x16 integrated flat array: https://www.dropbox.com/sh/mru3ekz2vsq9q2q/AABGDmF6O7i5g2pUHDM1kP4Oa?dl=0I am happy to share them if you email amarzo at hotmail.com but they are still quite tricky to make, I am refining the design. I promise I will publish an instructables when they are ready.Best,Asier.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam8 days ago
    Acoustic Tractor Beam

    Always transmitters. But most of the times receivers and transmitters are very similar so it is fine.Do not forget our other projects on levitation www.acousticlevitator.com

    Yeah, those to enable pair of channels. Most of the times they come already placed but in some cases you need to place them. Good catch.

    Dear Sarah,This tractor beam is too weak for urine but a standing wave can do the job levitator: https://www.instructables.com/id/Acoustic-Levitator/The problem could be how fast the droplets are falling or how big are they, but the standing wave levitator is a good starting point to test.Best,Asier.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator20 days ago
    Acoustic Levitator

    Good work.I remember they work fine for 2 days but I have not done long tests to check them. In any case, I have never seen them breaking if you do not exceed the maximum voltage (10V).

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator21 days ago
    Acoustic Levitator

    When using the Arduino clones (the same thing but cheaper) you need to install the drivers for the ch340. There is a link in the instructables, otherwise just search for arduino driver ch340

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator24 days ago
    Acoustic Levitator

    Sorry I just used 3D studio and the code from here (bowl generation) to design it: https://github.com/asiermarzo/Ultraino/tree/master/AcousticField3D

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator25 days ago
    Acoustic Levitator

    It is quite hard to get better Pascal for money than with the parking sensors but anything that outputs loud enough ultrasound can do the job.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator4 weeks ago
    Acoustic Levitator

    It looks great.

    You are totally right man, other guy said the same. I have added it into the text and made it clear in the schematics. Thanks!!!

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator4 weeks ago
    Acoustic Levitator

    Glad that you like it.It is hard to give a definitive number since it depends on how well you can source the transducers. In any case, I put a link to a place that sells all the components in a kit for 70$. But if you are going to build more than one and get big quantities of transducers, each kit should cost around 40$.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator4 weeks ago
    Acoustic Levitator

    That is great to know. From some measurements on the transducers they should also work well at 56.6kHz.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array5 weeks ago
    Ultrasonic Array

    It is hard to make a flat single-sided levitator with 16mm diameter transducers. It is much easier to use them in a bowl configuration https://www.instructables.com/id/Acoustic-Tractor-Beam/

    The bowl is single-sided and simple to assemble. The Ultrasonic Array is a little bit hard, I recommend some experience with electronics before starting it. In any case, good luck.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator5 weeks ago
    Acoustic Levitator

    Horizontal forces are around 8 times weaker in standing waves

    You should cover the other end with something reflective (plastic) to get the wave reflected or put another speaker.Also, it will not get enough power, you can try with the tube in horizontal. This is a good basic resource https://science.howstuffworks.com/acoustic-levitation1.htmFor more technical stuff our papers are free:https://www.nature.com/articles/ncomms9661http://aip.scitation.org/doi/full/10.1063/1.4972407http://aip.scitation.org/doi/full/10.1063/1.4989995http://ieeexplore.ieee.org/document/8094247/

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator5 weeks ago
    Acoustic Levitator

    Hi. With 40kHZ if you do not put your head inside it is fine. I have been working more than 3 years with this things and I have never felt any negative effect or hearing damage.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator5 weeks ago
    Acoustic Levitator

    Hi zkus, it is here: https://www.instructables.com/id/Acoustic-Tractor-Beam/It looks cool but it is weaker than the double-sided, it can only levitate styrofoam. Best.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam6 weeks ago
    Acoustic Tractor Beam

    That is amazing man. would you mind if I put in the main text? of course crediting you.

    glad that you like it.- More power could be used for heavier objects. For larger objects you need lower frequency. In this instructables we make a levitator that can levitate liquids and plastics: https://www.instructables.com/id/Acoustic-Levitator/- I think that levitating an object across the room would be great but sounds attenuates very quickly. Some things that we are testing are surface waves (the object is resting on a surface), electrostatic and magnetic forces.- In all the designs I try to keep the price as low as possible but the laser is quite a cool idea. Best.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator6 weeks ago
    Acoustic Levitator

    At lower frequencies you get less power (the gradient of amplitude is less sharp) and it also becomes audible. You need a lot of power to create acoustic levitation so it is better to work above the audible range. It is also hard to find powerful speakers, the 40kHz ones are the best power for money that you can find. There are also some good 25Khz ones (from Manorshi) that I have used to levitate larger objects but they are not as powerful and people usually get annoyed by the subharmonics.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator6 weeks ago
    Acoustic Levitator

    Yeah, sourcing cheap and good transducers is the hardest part. There is a link to a kit that includes the necessary material, it is a little bit more expensive than buying each of them individually but it is quite convenient. I think even when they say minimum order 1k they may take orders of 75 or 100.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator6 weeks ago
    Acoustic Levitator

    Do not put more than 12V in the input (the transducers get double of that because it is a push-pull configuration). Even with 8 or 9 should be enough to levitate water. Maximum density is around 2.6 g/cm3 http://aip.scitation.org/doi/full/10.1063/1.4989995 Figure 4

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam6 weeks ago
    Acoustic Tractor Beam

    Glad that you like it. Here we use ultrasound (40kHz) it is different from air jets since they compress and expand the air, there is no medium flow or movement. You can levitate things through fabric and also upside down. Check https://www.instructables.com/id/Acoustic-Levitator/ for liquids levitation.

    Thx https://licensing.jamendo.com/es/track/680970/some-body-to-dance-bonus-track

    Thx man, I will try to keep improving and posting some of our research projects. Next one is a directional speaker.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator6 weeks ago
    Acoustic Levitator

    Nope, the mini-lev uses directly the voltage from the Arduino. Best.

    For the flashlight competition I was going to levitate a neon lightbulb and excite it with a tiny tesla coil form a distance. But you cannot hold light per se with acoustic waves, you can deflect it a very slightly in the best case scenario, i.e. acousto-optic modulators

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam6 weeks ago
    Acoustic Tractor Beam

    No worries man, this was the first one. The new ones all have narration.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator7 weeks ago
    Acoustic Levitator

    There are some cheap oscilloscopes for 20$ or less (I think I included the links). It is also possible to use an Arduino as an oscilloscope, there are some tutorials around.

    Sometimes the emitters produce audible sound if there are materials like cardboard or foam around. There are also sub-harmonics being produced.

    It is not possible to levitate liquids with minilev.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator7 weeks ago
    Acoustic Levitator

    Yeah, but MEGA has different pinouts than UNO/NanoMega and sometimes different clock speed.This sketch is for the nano that has the A0-A7 at PortChttps://www.dropbox.com/s/tfuhrxvr9mbezsl/Signal40Khz.ino?dl=0The Mega has the A0-A7 in PortF so change all the appearances ofDDRC to DDRF andPORTC to PORTF

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator7 weeks ago
    Acoustic Levitator

    Yeah, Uno and Nano are the same so it should work fine.

    What error?If you are using an arduino clone you may need to install the drivers for it first.

    What is the error? Have you selected the correct port and the Nano board. Also you may need to install the drivers linked in this instructables.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator7 weeks ago
    Acoustic Levitator

    That is great work. I will try to make more obvious the connection between D10 and D11.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator8 weeks ago
    Acoustic Levitator

    Sure. The lateral forces are 5 times weaker than the transversal force (https://youtu.be/h0Mh0bIv9Fk?t=7m59s ), however, styrofoam is so light that you can levitate it in any direction even while shaking the levitator.

    Yeah, it is safe we have built it with kids at schools.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array8 weeks ago
    Ultrasonic Array

    This new setup has less strength than the others, it is designed to move the particles in 3D rather than levitating heavy objects. It is mainly for research purposes.If TinyLev is well-made it can reach 2.6g/cm^3 with quite a lot of voltage, it is easy to achieve 1.6g/cm^3 without forcing the setup too much. Check http://aip.scitation.org/doi/full/10.1063/1.4989995 Figure 4. Bear in mind that the excitation signal is double of the input voltage.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array2 months ago
    Ultrasonic Array

    Can be found at https://github.com/asiermarzo/Ultraino AcousticField3D in the paper there are more insights about how it works: http://ieeexplore.ieee.org/document/8094247/Best.

    Hard to say. The driver is around 30£, the arudino MEGA clone is 14£. The acrylic and glue for the standing wave is nothing (3£ aprox) but 60 transducers are going to cost anything from 30£ to 60£.If you want a simpler standing-wave levitator you can check the other instructables https://www.instructables.com/id/Acoustic-Levitator/ , a guy put a kit with all the components for 70$.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator2 months ago
    Acoustic Levitator

    1) If you do not put your ear inside the levitator it should be fine. Ultrasound is very powerful but very directive. It is hard to find exact max db but take into account that uBeam uses way much more power and is directly beamed at people.2) They are all emitters.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array2 months ago
    Ultrasonic Array

    not at all. I have never managed to use those for levitation.

    Hard to say man. In all the brands that I have tried emitters and receivers are the same. In this instructables https://www.instructables.com/id/Acoustic-Levitator/ you have a list of potential providers. At least to manorshi and ningbo you can ask for all transmitters. Best.

    They are like 5cm diameter and do not output much power. I have tried them in the past and although they are quite wideband their output power is like 20 times less than the regular ultrasonic transducers.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator2 months ago
    Acoustic Levitator

    Hi Leon,Mmmm do you know if the transducers are emitting something? try to put big chunck of styrofoam and see if it makes noise or if at least pushes the tiny particles. I have seen people working with a Uno. But I imagine if it is the very old version (with different clock speed) it may not work. You can also try this sketch (which does not need D10 connected to D11), it cannot control the phases but it should always get 40kHz regardless of the micro https://www.dropbox.com/s/tfuhrxvr9mbezsl/Signal40Khz.ino?dl=0Best.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator2 months ago
    Acoustic Levitator

    Hi, you put anything between 5V and 12V into the board. The board works in push-pull so the transducers see double the voltage that you put in, i.e. for a 7V input you get 14Vpp into the transducers, which should be more than enough for levitating styrofoam. Check the video for the particle sizes and how to put them in. Best.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator2 months ago
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam2 months ago
    Acoustic Tractor Beam

    Spikes will be around +-500mV and the sampling rate is slow enough so that you see the sampling scan advancing on the scope. It is more clear in the video. Best, Asier.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam3 months ago
    Acoustic Tractor Beam

    Sure, soon I will put an instructables and video but for the moment this paper http://ieeexplore.ieee.org/document/8094247/ could be useful it has a link to the github code, and the videos are in https://youtu.be/h0Mh0bIv9Fk

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam3 months ago
    Acoustic Tractor Beam

    It is to synchronise each period. The external timer outputs 40kHz at D10 and we use D11 to control the main loop. more info in http://ieeexplore.ieee.org/document/8094247/

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    It is a 8x8 flat array, I will publish soon an Instructables about it (it needs a 64-channel board to be controlled). In a tractor beam, when you put several particles they stick to each other in a vertical formation. In the standing wave if you try to put several particles in the same node they will be in a horizontal formation.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    That is amazing work. One cool option could be to use UV paint (or just highligther) and use UV LEDs. Best, Asier.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    with 7V should be more than enough to levitate styrofoam. Take tiny particles and put in the center like at the end of the video.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    You do not need to keep connected GND to D2. It is only when you want to move the particles up. There should be a wire connecting D10 to D11.

    You have some constants 0x that are used to define the waves in terms of phase for each channel. It should be possible left and right but not the other directions. If you want full movement you will need a driver board with more channels. Soon I will put an instructables for it: http://ieeexplore.ieee.org/document/8094247/metrics although it is quite a complicated project.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam3 months ago
    Acoustic Tractor Beam

    At the end of the video it is shown how to place the particles in the levitator.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    I will test to drive 2 transducers directly from the Arduino (10Vpp max) and report the results.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    Looks really good man. 1Amp would be perfect.For portable stuff I recommend a 7.3 Lipo battery and a DCDCconverter like in this Instructables https://www.instructables.com/id/Acoustic-Tractor-Beam/

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    Are the transducers legs making good contact with the wires?What if you flip the transducer?I will give it a try. I only tested with 5 transducers and it seemed to work. I will try again with others.

    I have managed to mark 80 transducers. There are some key points: - do not touch any metallic part (either the transducer or the wire) while you are doing this or you will discharge.- Mark the A0 leg if the signal goes up or caps at 1023 (maximum value).- Mark the GND leg if the signal goes down or caps at 0 (minimum value).How is it working for you?

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam3 months ago
    Acoustic Tractor Beam

    I was testing right now if it is possible to do it with the same ArduinoNano. I will report ASAP.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    PLA, the nozzle was 0.4mm I used the fast settings in Cura in a ultimaker 2.0 extended +. It took around 4 hours.I also tried with a makerbot 2.0 using the fast settings and it worked fine.

    Do you have a power supply with at least 6v and 600ma? If you could provide 9v and 1a that would be perfect. most dc adaptors will do that.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    Are all the lights on (driver and Arduino)? When you put particles in the levitator do they at least move a little bit? What power supply are you using (volts and maximum current)? Do you access to an oscilloscope?

    Sounds good, using 7 in a flower pattern (the one in the center should reverse polarity) also gives quite good results https://youtu.be/vLCrm6gos4w?t=50s

    The outputs look perfect. Could you connect a transducers to the oscilloscope and use it as a microphone to detect if the transducers from the levitators are emitting? also, it is much easier if the particles are spherical and around 2mm diameter.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator4 months ago
    Acoustic Levitator

    Are the red lights on the arduino and the driver on?Can you connect one transducer to the scope and use it as a microphone to detect if the transducers are emitting waves at all?Can you check the signal at Gnd&A[0..3] to see if you can see half-square waves of 5Vpp?Can you check the signal at Gnd&OUT[1..4] to see if you can see half-square waves of 10Vpp?500ma could not be enough do you have an adaptor that can provide 1A?Best,Asier.

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