DIY #10 - Can you build an ultrasonic cleaner from ordinary speakers?

After uploading this I realized that I never explained why I didn't use the tweeter if that one was more suited for higher frequencies. The answer is that I simply didn't think it'd move enough water.

Thank you for sharing this video. I think you provided an excellent overview and learning about what didn’t work is as important when trying to figure out what will.

Don’t know till we try! Thanks for the video!

Thank you for posting this it's got a lot of comments and people here as well as your own video. Most of the ultrasonic cleaners that I see roasted are more about vibrations through mechanical means and a motor.

Look up "how to make a transducer from a speaker". Then try again. You need to take the cone off, then attach something which will be in contact with the top of the coil, and the button of the plate. That will make the vibrations go straight into the surface above. With the cone attached, it will produce sound within the cavity, and it will escape. Making it into a transducer will cause the plate itself to be the producer of the sound, so it will carry the sound through the water.

It's partial success. May be DIY coil and plate on top of it works. Thank you for the hard work and time.

Try with "piezzo" speakers .. they are way more suitable for ultrasonic applications than classic magnet and cone drivers. (take care as they are very inefficient at lower frequencies and easy to "fry" .. but for 10kHz - up they should be fine.)

It is normally writen on speakers the frequency range they can produce. But hey, without a try how to know ? Thanks for this. Might be useful to have an ultrasound detector, and check different speakers, different sizes, and out of water. Water pressure might also affect the capability of the speaker to produce those waves. Could use a metal plate on top of them

As the frequency of vibration goes high the dimensions of the vibrating source object becomes smaller, that is nature. So, a tweeter (high frequency speaker) will produce just about 20 kHz. The frequency at which it sounds loud in the audio range is its resonant freq. However to move the mass (water or any surface) even minutely needs pushing power which cannot come from the diaphragm of a speaker. Anyway it is a true good demo and it will help many to understand and try different options.

I think you were on the right track - did the speakers really need to come into contact with the water? I think maybe a metal container rather than plastic and the speakers attached to outside >>> apparently the waves move through hard objects metal/glass better. I am no sound expert but the objective of moving the total volume of water with speaker in direct contact to water would inhibit the performance of the speaker and probably not allow it to make the high frequency mechanical movements. In the worst case attached to the outside you would have the container vibrating at the same frequency as the speaker and have a vibrating cleaner like some other youtubers do with a vibrating sander attached to container/jar.

I was working last weak trying generate 40khz I achieved with an arduino uno and the command tone (11,40000) ; - that output 40khz in the pin 11 and then I sent it to an dedicated amplifier of 50w

Hello do you think is possibile to build it with tranducers, a function generator from pc program and an ordinary amplifier? Thanx

I have one of those ultrasonic mist makers. Can those be used / converted into an ultrasonic cleaner?

The speakers didn't need to contact the water!

Most people have no clue about what ultrasonic is..or what a transducer is..

The BBC (British Broadcasting Corporation) sounds department is interested in your gadget for Sound effects on their low budget remake of Dr Who

youtu.be/PEYN85csjnU?t=161 Martin: Right now there is no signal Ultra sonic sensor : Hang on I am in the bathroom

what about LOW frecuency?

What specifically Chinese chips are taking about Please

That hertz my ears