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Open LEV

Open Source Analog Acoustic Levitation PCB

john-loefflerJohn Loeffler
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Open lev is an open source acoustic levitating device. It operates by an analog oscillator that produces a square wave of 40khz. Which is then amplified by a full bridge rectifier.

Open lev is Similar to Arduino/Atmega based Acoustic Levitation Build with the exception that there is no programming required. Instead it can be tuned for maximum efficiency with a trimmer potentiometer. This allows for adjustment at different altitudes (sound travels faster or slower). Since the speakers are fixed the tuning allows for a standing wave to be optimize

The Circuit is completely analog and requires no programing

Open lev aims to provide an SMD an THRU kit hole versions for individuals that want to experience the standing wave Phenomenon Up close.

  • 1 × 100nF - 0805 Capacitor
  • 1 × 100pF - 0805 Capacitor
  • 1 × 22uH - 06030 Inductor - 06030, 22uH, 3A
  • 2 × 10uF - 0805 Capacitor
  • 1 × SS34 (SMA) Discrete Semiconductors / Diodes and Rectifiers

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Chris wrote 11/02/2020 at 03:27 • point

Nice project! Would you be able to upload a higher resolution schematic?

  Are you sure? yes | no

Maker-fabs-J wrote 08/07/2020 at 03:39 • point

so is it with the same principle with the Acoustic Levitator?  https://www.makerfabs.com/acoustic-levitator.html

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howfool wrote 08/05/2020 at 09:06 • point

Nice project, but the diagram is a bit unclear, is there a clearer version?

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Reginald Sourn wrote 06/25/2020 at 07:06 • point

Your Project is really cool!

  Are you sure? yes | no

S James Parsons Jr wrote 06/20/2020 at 06:36 • point

What a fantastic project.  I’m curious about using a levitating drop in a laser microscope.  [[https://adammunich.com/laser-microscope/]]  A laser microscope shines a laser through a drop of water and the shape of the drop acts as the lens to project and magnify the contents of the drop.  I wonder if the drop is smooth or is agitated by the sound waves.  If this works, it wouldn't be too much work to add a laser diode to the PCB.

  Are you sure? yes | no

John Loeffler wrote 06/30/2020 at 01:20 • point

That is actually an intriguing concept.  I think I will need either higher power or more speakers to achieve that.

  Are you sure? yes | no

S James Parsons Jr wrote 06/30/2020 at 01:48 • point

why would you need more speakers or higher power? 

  Are you sure? yes | no

Derrick wrote 06/19/2020 at 02:50 • point

Hi amazing work, is this powerful enough to assemble images with the liquid? Much like the acoustic tweezers in this video? https://www.youtube.com/watch?v=0Up5kr5Xgcg&t=7s

  Are you sure? yes | no

John Loeffler wrote 06/19/2020 at 11:58 • point

unfortunately not at the moment. That will require a larger array (maybe 10 speakers).   

I anticipate once I build a schlieren imaging apparatus I can fine tune the speakers and create an array that creates more powerful nodes to trap water.   

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M. Bindhammer wrote 06/19/2020 at 14:11 • point

I think you should write more about the operation of the device

  Are you sure? yes | no

bobricius wrote 06/18/2020 at 06:46 • point

Purpose of attiny85? you write "requires no programing" If I use 12V power supply can I remove half of schematic nad use only Ultrasonic driver?

  Are you sure? yes | no

John Loeffler wrote 06/18/2020 at 22:03 • point

It was a backup just in case the 4047 didn't work.   It works but I kept breaking it it turns out the DRV8833 has a voltage limit of 10.8V.  

I was using it to 12V, opps.

  Are you sure? yes | no

morgan wrote 06/15/2020 at 18:44 • point

You could add a slot & tab to make the board to board mounting more solid. Also adding vias will prevent the solder pads from pulling up too easily.

  Are you sure? yes | no

John Loeffler wrote 06/15/2020 at 19:21 • point

There is a slot.  Good idea on the vias.  That was a problem on one of the boards.  

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bobricius wrote 06/10/2020 at 18:37 • point

I have never seen a more beautiful PCB in my life and so effectively designed !!! Great job!

  Are you sure? yes | no

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