author
3Instructables288,905Views301CommentsBristol, 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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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam21 hours ago
    Acoustic Tractor Beam

    I would put them in sync with the 5. Best.

    Paste the obj text in the box and click import from OBJ. There should be only one polygon per transducer.

    View Instructable »
  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array21 hours ago
    Ultrasonic Array

    Hi,- 3 ways because the pitch is 2.53mm, the separation between the legs of the transducers is 5mm, so the middle hole is not used. It is the cheapest and most reliable way I have found to connect transducers to wires in a reusable manner. If you want you can just solder directly the wires.- You can see how they connect in Figure 10 https://ieeexplore.ieee.org/document/8094247/- The PCB has 2 layer, I do not know about the dimensions but it should appear in the manufacturer.

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

    You can populate them for more power but you will lose a little bit the ability to move the particles up/down.

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

    There are some links to 40kHz transducers. 4kHz will not work and also they are really loud. Best.

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

    I am powering the logic part of the L298N which works at 5V. It is not the most optimum way of doing it but it was the safest for the regulator. In any case, I have put more than 19V in the regulator of the L298N without any problem, if you check the wiring for the single-axis levitator it is much simpler: https://www.instructables.com/id/Acoustic-Levitator/

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

    the cover is great!!!

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

    It does not matter at all, as long as the metal wires make good contact with the legs..

    Really good work.

    In a regulated power supply. In any case, this step is just for testing that everything is going ok.

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

    You need to export only the faces of the transducers as an obj, copy this obj and then use the import from obj feature.

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

    If you check the my other instructables, there are simplified versions that use only an arduino and an L298N as a driver. The tractor beam is considered to be single-sided. If you want a pure flat surface then you need individual phase control, you can also check the tractor beam for the 3D printed tubes device.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator10 days ago
    Acoustic Levitator

    When using styrofoam particles of around 2mm size it should be enough with even 6V and it should be very easy, especially if you use a piece of fabric or metallic grid.

    You need to upload the code for that step in the Arduino. Then on the Serial Plotter be sure that the Correct port and speed have been selected. You can also use a regular oscilloscope if you have one around.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator13 days ago
    Acoustic Levitator

    Really good work.

    If they are from different bowls it does not matter. Give it a try anyway, it may have enough strength for your applications.If they are from the same bowl and they are in reversed polarity it will be decrease the levitation strenght. You can cut the wires behind and in front of that transducer and put new wires in zig-zag.

    Yeah, there is an alternative method using the Arduino nano. It is described in step 4

    You can change the frequency of the transducers either when you add them or when they are selected in the Fr: textboxYou can also add manually the speed of sound and density for using different materials. However, when you do levitation in air the particle material does not matter at all, everything is solid compared to air.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam15 days ago
    Acoustic Tractor Beam

    Sure, if you check this instructables https://www.instructables.com/id/Ultrasonic-Array/, there is a video and links to the software.

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

    Since the arduino can only run one thread it is hard to combine logic with accurate emissions of phases. I totally recommend getting a another nano that process the joystick and activates the D2,D3,D4 pins.Best.

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

    The Uno is similar to the Nano so it should be fine.Why would you like more transducers? For more power there is a step with Big Lev. If you want more control on the particle with individual channels then it gets a little bit more tricky https://www.instructables.com/id/Ultrasonic-Array/

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

    Check Step 2340 kHz transducers only operate at 40kHz. You need to buy 25khz transducers (from Manorshi for instance). To operate at 25kHZ use OCR1A = 320;

    40 kHz transducers only operate at 40kHz. You need to buy 25khz transducers (from Manorshi for instance). To operate at 25kHZ use OCR1A = 320;For pressure changes and more complicated stuff you can check my other instructables in Ultrasonic phased array.You can move the particles faster, if you check the code you can easily reduce one of the constants.

    It looks great, you can also try with spheres of styrofoam painted with different colours.

    Have you uploaded the code in to the Arduino?Have you selected the correct port for the Serial plotter?Best.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array4 weeks ago
    Ultrasonic Array

    There was a mistake in the part number:I have corrected it to 506-7014

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

    Hi kate,How big are the particles that you are trying to levitate?Can you try putting them in the middle of the levitator?How much voltage are you providing? Are all the lights on?Best,Asier.

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

    Are you sure about that? that would imply that the Piezo crystal is always placed with the same orientation. In any case, I will try it. If it works, it is a very nice and simple method. Thanks for the info.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array6 weeks ago
    Ultrasonic Array

    Yes, the mosfets are powered directly by up to 12V (or up to 15V) you can replace the TC4427a by the MIC4127 for being able to put more voltage.If you want to experiment with the tactile sensations I would recommend starting with bowl from the https://www.instructables.com/id/Acoustic-Tractor-... and the driver from https://www.instructables.com/id/Acoustic-Levitato... just by modulating the 40kHz on/off at 200Hz you will feel the focal point. The point is fixed at a spot but it will give you an idea of how it feels, which in my opinion is a little bit disappointing.In any case, I am working on releasing a 16x16 integrated array that may be more suited for those tasks.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array6 weeks ago
    Ultrasonic Array

    I have just added the pin number at the end of Step 3. But luckily the assignment with the nano removes the need to check that.

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

    Great, I have added a link to your code if you do not mind. Best.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam7 weeks ago
    Acoustic Tractor Beam

    Glad that you like it. I will try to publish it soon, I just want to be sure that it sounds as good as possible.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array7 weeks ago
    Ultrasonic Array

    Corrected. Thanks!!!

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array7 weeks ago
    Ultrasonic Array

    Have you added the lines of code in HardwareSerial.h, the instructions are at the end of this https://github.com/asiermarzo/Ultraino/tree/master/Arduino%20MEGA%2064%20driver%20board%20code and in the header of the files. Also be sure, to have only one .ino file in the directory. Best.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam7 weeks ago
    Acoustic Tractor Beam

    Normal sound is ok with it but if it is very loud it will make the bead wobble. Ultrasound will not go through wood, it only goes through metallic grids and most fabrics.

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

    Something must be wrong. You are using the nano or the scope? Can you reverse the transducer connection and see if the signal looks the same.

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  • Asier Marzo commented on Asier Marzo's instructable Ultrasonic Array7 weeks ago
    Ultrasonic Array

    Have you selected the MEGA as the target device?I do not have the uncompiled schematics for this one but a brief schematic for the channel can be found in the paper http://ieeexplore.ieee.org/document/8094247/Best

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Tractor Beam7 weeks ago
    Acoustic Tractor Beam

    Hi,this levitator uses a twin-trap ( https://www.nature.com/articles/ncomms9661 Figure 3). vortices can only trap stably very small objects because it makes them spin like crazy. Single-sided levitator are cool but not very powerful. If you need to levitate dense objects I recommend the standing wave lev https://www.instructables.com/id/Acoustic-Levitator/ . I also added the instructions for smal 8x8 phased-array that can generate any beam but it is a little bit tricky to make https://www.instructables.com/id/Ultrasonic-Array/ Best

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

    generate 40kHz signals that will be later amplified by the L297N driver and then fed into the transducers.

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

    good work, if you need more info about levitating other materials you can check this open paper https://aip.scitation.org/doi/full/10.1063/1.4989995

    They are just buttons to move the particle up/down, you can ignore them if you do not need to move the particle

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

    https://www.instructables.com/id/Ultrasonic-Array/ there will be a video on how to use the software and links to github. In github there is the source code and some simulation files, there is one for TinyLev.

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

    Hi,High-pitches noises may be due to some particles or glue inside the transducers.Putting water requires some practice with the syringe, kindly check the video at the end.D2,D3,D4 are left unconnected and pulled to ground to move the particle up, down or reset respectively.Best.

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

    They are button to control the movement of the levitated particles.

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    Likewise, keep on with the good work : ) and send my regards to Jess McIntosh.

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  • Asier Marzo commented on Jakub_Nagy's instructable Acoustic Levitator Case2 months ago
    Acoustic Levitator Case

    It look great. Thanks for sharing.

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

    It is an option step, just to check that everything is emitting what it should. Indeed, there are 2 transducers connected to each probe of the scope. Transducers can be used to emit but also to read signals.

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

    I think they have the same link for several of them, when you make the inquiry just tell that you want this model MSO-A1640H10 (only transmitter) and it will be fine.

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

    what you are doing seems fine. If you are in doubt poke the transducer with a thin wire and you will see a spike in the same way as you see in the oscilloscope method.

    filament should be fine but try first with 2mm (aprox) diameter styrofoam, they are the easiest to levitate so if they do not levitate something is wrong. The driver board should be producing a square wave with a peak to peak voltage that is double of what you put in. You cannot measure it with a multimeter, you need an oscilloscope.

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

    There is a link to a kit with all the stuff, you can also use something like 3dhub

    any gauge is fine but I recommend the specified gauges.

    Arduino Uno is perfect, it is the same hardware as nano.What are you trying to levitate? do styrofoam particles of 2mm work?

    there is a smaller version named microlev

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

    That is why marking them it is very important, otherwise it will not work very well. Up to date, I have not found a company that marks them correctly.

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

    I usually use 18V, which is more than enough to flip it upside down. Perhaps those transducers are not as powerful as manorshi's?If you want to use 25kHz (To levitate larger objects), I would recommend building BigLev (step 23) https://www.instructables.com/id/Acoustic-Levitator/ since 25kHz transducers are weaker than 40kHz and you will need a standing wave. In step 23 I have added a simplified code that cannot move the particles but it is easy to adapt for different frequencies.

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

    Nor the oscilloscope neither the arduino method work?In the video of this instructables the oscilloscope method is shown with more detail: https://www.instructables.com/id/Acoustic-Levitator/

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

    The peak to peak voltage on the transducers is double the input voltage because they work using push-pull.The L297N is actually used to drive 2 DC motors, you cannot double the voltage but you can invert the rotation direction.Best.

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

    Those transducers seem ok. Could you point the bowl into a water surface, that way you will be able to "see" the field. If it looks like a single dimple in the water then some of the OUT1,OUT2,OUT3,OUT4 wires should be swaped. If it looks like two dimples then it is correct () .https://www.nature.com/articles/ncomms9661 Figure 3.d If your oscilloscope have two channels you can also try to connect two transducers to the probes and check that the halves of the bowl are emitting out of phase.

    Mmm not safely I think, you can get some cheap usb chargers. In the components sections there are some links to it.

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

    It is explained in this paper http://ieeexplore.ieee.org/document/8094247/

    You will need to use 2 timers, one for each array. Remember that those transducers will only operate at 40khz+-1khz, they are quite narrowband. By using slightly different frequencies you can create travelling waves, but I do not think the Arduino has enough resolution for that.

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

    All the transducers are emitting, a standing is create between the two halves, particles get trapped in the nodes. For more information you can check the open access paper http://scitation.aip.org/content/aip/journal/rsi/88/8/10.1063/1.4989995 or the video by Physics Girl https://www.youtube.com/watch?v=ABjRnSYw-4k&t=2s Thanks

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

    They are quater wavelenght grid, to cancel reflections at 40kHz but I have never measured how effective they are.

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

    Right.I would recommend delayMicroseconds.Best.

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

    In this instructable we use 10mm transducers: https://www.instructables.com/id/Acoustic-Levitator/

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

    Looks like a proper scientific instrument now.

    That looks amazing. To cut it I use an ultrasonic knife, it works great on plastics. I will try to publish an instructables on it since the commercial ones are a little bit pricey. I also use a dremel with a filing tool to drill through the bases, I know it is not ideal but it does the job.

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  • Asier Marzo commented on Asier Marzo's instructable Acoustic Levitator3 months 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 Levitator3 months 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 Levitator3 months 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 Array3 months 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 Beam3 months 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 Levitator3 months 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 Levitator3 months 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 Levitator4 months 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 Levitator4 months 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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