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DIY Ultrasonic mist maker


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#1 Alpoehi

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Posted 06 February 2020 - 08:32 AM

Recently I watched a video on YT where someone had the idea to put together an ultrasonic mist maker.

 

It's here:

https://youtu.be/OOZi3QnnDCo

 

Circuit schematic is here:

https://youtu.be/OOZi3QnnDCo?t=517

 

There ia also an instructables to it:

https://www.instruct...nic-Mist-Maker/

 

The funny thing is this guy took one of the cheap mist makers sold in china, analyzed it, then reverse-engineered it.

 

That's normally what the chinese do with western products, lol.

 

But more, he implemented a 555 timer into the circuit and a IRLZ44N mosfet. An inductance coil with 220 uH is used.

The circuit is so simple, I decided to order the piezos from china and give it a go.

 

The membrane of the menbrane is very sensitive. Avoiding minerals sticking to it I use distilled water.

But as you see in the picture, it is an open system, other than most of the cheaper ones made in China.

 

Most of them are encapsulated in a steel encasement. It's a perfect ground for bacteria to grow and it will be rusty after a while.

In most cases the membrane cannot be replaced.

I studied the comments on amazon and lots of people are complaining about the devices not lasting too long.

 

Once you have figured it out, you can make 3 to 5 of them and set them up for mushroom cultivation or growing cacti and exotic plants.

 

The disks can be integrated into a wall-side water container. Only the disk has to be inside of the tub, that's the benefit I see.

I will definitely try on that and post an update one day.

 

 

Here's the result:

Attached Thumbnails

  • mistmaker.JPG

Edited by Alpoehi, 06 February 2020 - 11:37 AM.

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#2 Alpoehi

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Posted 06 February 2020 - 01:54 PM

Here's my first test run. I'm aware I'm putting my mexican grow at risk here.

But I want to see how the mushrooms react to increased humidity.

The fine mist is moving inside the jar, it's not too much just enough for the grow to soak in a while.

A few hours and it comes back into the fruiting chamber.

Attached Thumbnails

  • misting.JPG

Edited by Alpoehi, 06 February 2020 - 01:56 PM.

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#3 YoshiTrainer

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Posted 06 February 2020 - 02:53 PM

Nice job Alpoehi, looKS like it is working well for you! Are you going to test it in your fruiting chamber next?

#4 Alpoehi

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Posted 06 February 2020 - 03:10 PM

I plan on building a large fruiting chamber with a number of ultrasonic discs in it.

The idea is to dunk once, then have continuous grow of mushrooms when the substrate and the mushrooms get enough humidity from the flow of mist inside.

The mist doesn't build waterdrops on the mushrooms, it is condensing at the walls then flowing downside into a water container.

So the substrate is elevated a bit from the bottom and the condensing water is running down alongside the walls into the water, but not into the substrate.

 


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#5 YoshiTrainer

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Posted 06 February 2020 - 05:16 PM

Very nice, would you have to eventually drain the tub of condensate?
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#6 ElPirana

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Posted 06 February 2020 - 06:22 PM

Very nice, would you have to eventually drain the tub of condensate?

If I understand correctly, Alpoehi’s idea is than any condensation on the walls of the chamber will flow down to the bottom where it will collect and be turned back into mist again.

Is it more of a fogger than a mister?
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#7 Alpoehi

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Posted 07 February 2020 - 02:08 AM

Still I have to calibrate, it's a resonant circuit, needs some tinkering.
In the glass dome, the mist is moving around, like warm air would do.

Foggy would mean it stands still, I guess that would be when used in a large tub.

The cake soaked in wet, the shrooms have grown. I can pick the first one today.
There are a lot for the small cake, I support it from being dried out to quickly.

Nice toy, I must say. Payed 6 to 8 bucks for all parts.
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#8 YoshiTrainer

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Posted 07 February 2020 - 10:20 AM

Thanks for the clarification ElPirana!

Nice Alpoehi and a great price too, cheapest I could find "quality" ultrasonic was a Swiss made one for $25.
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#9 Boebs

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Posted 07 February 2020 - 10:25 AM

I used one for a while, i loved the ease of these.
I just placed the whole thing in a cup of water in the corner of my fish tank i used as a fc.

That and a little computer fan and it was perfect.
The little element does go out after a while.
Using distilled water will prolong the life.

Good post and great luck on the project!
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#10 Alpoehi

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Posted 07 February 2020 - 10:55 AM

I used one for a while, i loved the ease of these.
I just placed the whole thing in a cup of water in the corner of my fish tank i used as a fc.

That and a little computer fan and it was perfect.
The little element does go out after a while.
Using distilled water will prolong the life.

Good post and great luck on the project!

 

Thank you Boebs, I'd love to use that on exotic plants. Any suggestions?

A replacement of the disc is 2 bucks, lol.


Edited by Alpoehi, 07 February 2020 - 12:31 PM.


#11 TVCasualty

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Posted 07 February 2020 - 02:17 PM

This is great, thanks!


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