If you want to read more about this topic, here are some links: www.mdpi.com/1424-8220/22/17/6378 shorturl.at/jpGP6 www.ncbi.nlm.nih.gov/pmc/articles/PMC6468117/ www.digikey.com/en/resources/conversion-calculators/conversion-calculator-555-timer
I feel the video was to short. I would like to see how to fine the practical resident frequency. The explanation of the theory was great, but how do I find the resident frequency of piezoelement? What test equipment or procedures do I use? Thanks for your video.
Hi, thanks for the comment ) It is actually funny, cause i had this part in the video but eventually decided to cut it out cause i found it a little bit boring. I did not have the equipment to show it on practice 😅 To find piezo resonant frequency you have to connect it to the signal generator and look at the current consumption while changing frequency. At one resonant frequency current consumption will be highest (low admittance) and at another one - consumption will be lowest (high admittance). That is the way i know ☺
Dang, i already know how it works after i read piezoelectric.... but i never would have expected humidifiers using them xDDD That's amazing honestly, something I would never think of on my own :D I guess its oscillating above 20khz so its not audible! Basically a speaker that blasts a mist of water instead of air. I wonder if Dog's can hear it though?
@@Linguae_Music Actually it is audible. A little bit. You still can hear high frequency noise. I believe it is because the form of the signal formed by the control system is not ideal and has distortions. So if you make a Fourier transform there will be components with a lower frequencies with some amplitude which create some noise. Why do you need dogs to hear it? 😅
What I don’t understand is how the water film appears on the top side of the piezo element when the wick pushed against the bottom. How does that work?
Hmmm, very good question. I believe its because of capillary action through the gaps between rubber ring and piezoelement bottom part. So far I have no better explanation 🧐
I looked into it a bit more and it seems like this element isn’t the disk type, but a piezo ring that has a super fine grained mesh in the middle. The piezo ring slaps it onto the water surface and this causes water to shoot up through the holes, creating the droplets. The disk type on the other hand is used in submerged foggers that are used in ponds etc. I’m not sure if any of this is definitely true by the way, if the element is indeed a mesh it must have microscopic holes because it sure looks like a solid disk to the naked eye. On the other hand, I don’t know how a film could develop on the other side is solid, so surely there is some way for the water to pass through?
If you want to read more about this topic, here are some links:
www.mdpi.com/1424-8220/22/17/6378
shorturl.at/jpGP6
www.ncbi.nlm.nih.gov/pmc/articles/PMC6468117/
www.digikey.com/en/resources/conversion-calculators/conversion-calculator-555-timer
I feel the video was to short. I would like to see how to fine the practical resident frequency. The explanation of the theory was great, but how do I find the resident frequency of piezoelement? What test equipment or procedures do I use?
Thanks for your video.
Hi, thanks for the comment )
It is actually funny, cause i had this part in the video but eventually decided to cut it out cause i found it a little bit boring. I did not have the equipment to show it on practice 😅
To find piezo resonant frequency you have to connect it to the signal generator and look at the current consumption while changing frequency. At one resonant frequency current consumption will be highest (low admittance) and at another one - consumption will be lowest (high admittance). That is the way i know ☺
Dang, i already know how it works after i read piezoelectric.... but i never would have expected humidifiers using them xDDD
That's amazing honestly, something I would never think of on my own :D
I guess its oscillating above 20khz so its not audible!
Basically a speaker that blasts a mist of water instead of air.
I wonder if Dog's can hear it though?
Well... Dogs can't hear 5mhz, so that's a no!
@@Linguae_Music Actually it is audible. A little bit. You still can hear high frequency noise. I believe it is because the form of the signal formed by the control system is not ideal and has distortions. So if you make a Fourier transform there will be components with a lower frequencies with some amplitude which create some noise.
Why do you need dogs to hear it? 😅
What I don’t understand is how the water film appears on the top side of the piezo element when the wick pushed against the bottom. How does that work?
Hmmm, very good question. I believe its because of capillary action through the gaps between rubber ring and piezoelement bottom part. So far I have no better explanation 🧐
I looked into it a bit more and it seems like this element isn’t the disk type, but a piezo ring that has a super fine grained mesh in the middle. The piezo ring slaps it onto the water surface and this causes water to shoot up through the holes, creating the droplets. The disk type on the other hand is used in submerged foggers that are used in ponds etc.
I’m not sure if any of this is definitely true by the way, if the element is indeed a mesh it must have microscopic holes because it sure looks like a solid disk to the naked eye. On the other hand, I don’t know how a film could develop on the other side is solid, so surely there is some way for the water to pass through?
My friend, why does a device like mine fail? They only worked for 10 or 20 minutes
Hello. Hard to say. It can fail due to many reasons. First of all, check power supply
@@NickElectronicsThank you