DIY Ultrasonic acoustic levitation

ultrasonic

[Mike] saw a few videos of ultrasonic acoustic levitation rigs put together by student researchers. Figuring it couldn’t be that hard to replicate, he set out and built his own using surplus parts and whatever was sitting around his parts drawer.

The build began with a huge ultrasonic transducer from an old ultrasonic cleaning tank [Mike] picked up on eBay for $20 £20. He didn’t pick up the standard driver board, as those don’t have a very clean output – something desperately needed if you’re setting up a standing wave. He did manage to put a simple supply together with a 555 timer, a MOSFET and a 12 V transformer connected backwards, though.

The test rig is pretty simple – just the transducer sitting on a table with an aluminum plate sitting above it on threaded rods. By adjusting the distance between the transducer to the aluminum plate, [Mike] managed to set up some standing waves he was able to suspend small Styrofoam balls in. It’s not quite precise enough to levitate small chunks of sodium and water, but it makes for an excellent science fair-type project.

Comments

  1. Mr. Troglodytarum says:

    wait…is this 1630? since when did sound waves become a ‘chemistry hack’? 80)

    • Mike Szczys says:

      Ha! Nice one. But I’m fairly certain that ultrasonic levitation is sometimes used as a tool in chemistry experiments. Not being a chemist or chemical engineer myself I’m counting on some knowledgeable readers to back me up on this one.

      • Chris C. says:

        The writeup itself provides the example you’re looking for – observing the reaction of acoustically levitated sodium and water. An example of this reaction:

        Though the build isn’t (yet) capable of this, filing it under chemistry hacks isn’t too much of a stretch.

      • Alex says:

        Hello, I would like to know what’s the precise reference of the transformer you are using in the driver.
        Thank you.

  2. _ says:

    first

  3. pigpenguin says:

    In your article you say $20 but in the video he says £20 which is ~$32

  4. physical 3d voxels says:

    Ummm… perhaps the follow-up would be a set of these controlled by software to make a static styrofoam pixel display?

  5. gamerpadddy says:

    where to get such transducers? i cant find one on ebay under 50€

  6. IROS99 says:

    Wow great!! Is it okay to stimulate the transducer without a liquid? I heard it is easy to break the transducer if being stimulated iwithtout liquid.

  7. Lucy says:

    can you post all the supplies needed in writing?

  8. Marjorie says:

    Hello !
    You are a group of french students interested in your acoustic levitation experiment. We are looking forward to recreating this experiment in the context of our scientific studies. Would it be possible to have more informatinos about the way you carried it out ?
    Thank you very much !

  9. Karib says:

    Hello, my 12 y.o. daughter, too, is very interested in trying to recreate this project for her school’s science fair. She is fascinated with acoustic levitation learning about it on the History channel this weekend. Thank you for any tips you may be able to provide, namely specific supplies you used. Thank you!!!

  10. Robb says:

    I wonder if a transducer of this type would work. Very cheap and comes with 2.
    http://www.steminc.com/PZT/en/ultrasonic-air-transducer-45-khz?gclid=COWUy8C02b0CFW5eOgodYFgA7Q

  11. Jesse Vetsch says:

    Could you possibly send or post a slightly more detailed explanation of the circuit, with amperage and other details so we might recreate it more easily? Would greatly appreciate it.

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