author
3Instructables230,599Views203CommentsBristol, 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 Ultrasonic Array1 day 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 Levitator3 days 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 Levitator4 days 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.

    View Instructable »
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator6 days 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.

    View Instructable »
  • Asier Marzo followed DanielN2531 week ago
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam1 week 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 Levitator1 week 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 Levitator1 week 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 Levitator1 week 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 Beam1 week 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 Levitator1 week 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 Beam2 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 Levitator2 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.

    View Instructable »
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator2 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 followed MichielD992 weeks ago
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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator2 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.

    View Instructable »
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator2 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 Levitator3 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 Array3 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 Array3 weeks 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 Levitator3 weeks 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 Array4 weeks 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 entered Ultrasonic Array in the Arduino Contest 2017 contest 4 weeks ago
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator1 month 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 Levitator1 month 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.

    View Instructable »
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator1 month ago
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam1 month 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.

    View Instructable »
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam1 month 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 Beam1 month 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 Levitator1 month 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 Levitator2 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 Levitator2 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 Levitator2 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 Beam2 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 Levitator2 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 Levitator2 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 Levitator2 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 followed How-ToDo and darbinorvar2 months ago
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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam2 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 Levitator2 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 Levitator2 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.

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

    Hi,Glad that you like it.Building UltraTongs should be easy and cheap. You need 2x7 10mm diameter transducer for each.I would recommend the driver board from the Instructables "Acoustic Levitator" it is simple and uses push-pull (double the voltage on the transducers) otherwise you can just use the tractor beam circuit with 24V on the DC converter.Using the Acoustic tractor beam driver. Connect one channel (OUT1 for instance) to the positive legs and GROUND to the negative legs of the transducers of the 6 outer transdsucers, The inner transducer should be connected with reverse polarity (GND to the possitive and OUT1 to the negative). You can use different OUTs for each 7-transducer array to balance the load.Using the Acoustic Levitator driver, connect OUT1 to the positive leg...

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    Hi,Glad that you like it.Building UltraTongs should be easy and cheap. You need 2x7 10mm diameter transducer for each.I would recommend the driver board from the Instructables "Acoustic Levitator" it is simple and uses push-pull (double the voltage on the transducers) otherwise you can just use the tractor beam circuit with 24V on the DC converter.Using the Acoustic tractor beam driver. Connect one channel (OUT1 for instance) to the positive legs and GROUND to the negative legs of the transducers of the 6 outer transdsucers, The inner transducer should be connected with reverse polarity (GND to the possitive and OUT1 to the negative). You can use different OUTs for each 7-transducer array to balance the load.Using the Acoustic Levitator driver, connect OUT1 to the positive legs and OUT2 to the negative legs (please reverse the polarity of the central transducer). If you use OUT1&OUT2 for the bottom array and OUT3&OUT4 for the top array, you will be able to move particles up and down.Best,Asier.

    Half a volt is not very significant. Perhaps the driver is broken?

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

    That sounds great. Good luck with it.

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

    Hi Ain,You can use the code provided in the instructables. What short of modification you would like to make to it?Best,Asier.

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

    Before putting the transducer on the sockets, apply a blob of hot-glue using a hot-glue gun. Once that you socket the transducer press the top with the fingers to fit it as well as possible. The transducers should be fixed by the hot-glue not by the soldering. I have added links to the exposed wire for UK or USA in the Instructables.It does not matter if the transducers are not perfectly orientated.

    Could you connect D10 to D11?

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

    I know they say they are 40khz and 10mm. But if you check the specs they are 16mm and 38kHz.I totally recommend Manorshi or Ningbo (the ones that I give links for) if you ask them they can send you 75.

    I used the approach described in this paper: http://aip.scitation.org/doi/full/10.1063/1.4989995If you put just 2 transducers opposite to each other it will work as long as they are not separated more than 5cm or so.

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

    The components can be purchased for around 70$ but it is quite tricky to get the the transducers for a good price. I recommend contacting the two companies that I mention (Manorshi, Ningbo) since they will provide 75 transducers for a reasonable price.Best,Asier.

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

    Send it through msg.

    I used 3D studio to design it. If you want I can send the max file, what is your e-mail?Best,Asier.

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

    Glad that you like it. There is a research paper that studies the effects of acoustic levitation on different creatures: http://aip.scitation.org/doi/abs/10.1063/1.2396893?journalCode=aplFor the moment the biggest thing that I have seen levitating is an apple.

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  • Asier Marzo's entry Acoustic Levitator is a winner in the Make It Fly! Contest 2017 contest 3 months ago
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months ago
    Acoustic Levitator

    thanks klettervirus, I will try to add a tiny section for using the Arduino Nano as a tiny oscilloscope. It does the job decently.

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  • Asier Marzo's entry Acoustic Levitator is a finalist in the Make It Fly! Contest 2017 contest 3 months ago
  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam3 months ago
    Acoustic Tractor Beam

    Hi, glad that you like it.to move the focal point we change the phases. Each period is divided into 24 steps of 0s and 1s by shifting the patterns we change the phase:000000000000111111111111 -> phase 0000000111111111111000000 -> phase pi/2the phases are precalculated for the different points and hardcoded in the code (that is why there are a lot of hex constants).Best,Asier.

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

    The voltages seem perfect. Only think I can think is not having enough amps from the DC adaptor. Could you try to provide 6 or 7V? That should be enough to levitate styrofoam particles and will consume certainly less than 1Amp.

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

    They would only cancel each other if they were propagating in the same direction but since they are counter-propagating they always create the standing wave pattern. With liquids it is more tricky to move them up/down.

    Yep, I usually use a regulated supply. Depending on the voltage you will change the shape of the droplet.

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

    If what you are levitating is not very heavy (i.e. styrofoam) you can rotate the levitator 360deg and the particles will still be trapped.

    Mmmm water certainly not and ethanol will pop. Liquids will not levitate sidewise.

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

    Any transducer will do the job. I will provide designs for both 16mm and 10mm transducers.

    I do not think so. If you do not have a scope there are several instructables for making one just with an Arduino nano.

    I can confirm that. If you find a good provider in alibaba and do not mind purchases in big packs, then it is amazing.

    How many volts are you providing to the device and how many amps is it consuming? If you had a scope you could test if the arduino is generating 5V signals and if the driver is amplifying them. There are some simple tutorials for creating a scope with an arduino.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam4 months ago
    Acoustic Tractor Beam

    With the scope you should be able to check if the Arduino is generating logic signals and if the Driver is amplifiying them. I recommend running the device at 20V (no more than 25V) I think it should consume more amps at that voltage.

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

    Thanks for the pictures. Is D10 connected to D11?Are the red lights of the Arduino and the Driver on?

    Is there a jumper between D10 and D11? In other words, D10 and D11 need to be connected. If you see no signal in A0 when those pins are connected then something must be going on with the arduino. Best.

    Do not be disappointed with the tractor beam, it can levitate things upside-down but it is much weaker than this standing wave levitator. It can only levitate Styrofoam. Kindly, let me know if you get any results with the schilieren, we had it working in water but no luck for acoustic waves in air. Although this videos shows that it is possible https://www.youtube.com/watch?v=XpNbyfxxkWE

    congrats, looks very well done. Hopefully I will be able to release a directional speaker soon, I imagine people getting tired of levitation : )

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam4 months ago
    Acoustic Tractor Beam

    How low the voltage went? the ideal value would be 20V int the DCDC converter. It will not be able to produce less than the input voltage.Do you have a scope to test if the Arduino is generating the signal and if the driver is amplifiying it?

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

    Very good job, congrats. In a couple of months I will try to publish the instructions for a directional speaker. The hardware is pretty much the same so I bet you could build it easily.

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