Fog Machine

[gtr_stitch]

Alright, so just want to suppliment my knowledge on a small project I wish to undertake...

I know that a piezo could be used to make a fog machine (I think somewhere in the Mhz range). My thoughts are since a 555 and 741 can't generate that high a frequency, what little device would/should be ideal?

Also, not sure about this, but could I use a 386 to amplify the signal and maybe get more bang for my buck? Or would that not be a good idea?

Any feedback would be cool!

 

[gtr_stitch]

Could I use logic gates to generate Mhz freq?

 

[BrownOut]

Could I use logic gates to generate Mhz freq?

Sure, 54/74HCXX works well into the MHz range. Here is a good reference. https://www.fairchildsemi.com/an/AN/AN-118.pdf

 

[ronv]

I think I would try a CMOS 555 and a FET to drive it (2.7 Mhz.). Then you could tune it.

 

[gtr_stitch]

Brownout- awesome! Thanks for the PDF it's helped a lot!
Ronv- how would you wire that?

 

[ronv]

Do you have any specs on the transducer?

Here is one you can buy.

**broken link removed**

 

[gtr_stitch]

Dang...you know, the one I have I got from radio shack. It doesn't have ratings on it (other than max voltage), so I checked on their website, and the highest ratings for any of their piezos is anywhere between 1.5mhz to 3mhz (or something like that)...guess I'm goin shopping first!

 

[SABorn]

Just wondering how these foggers go in fish ponds with a constant frequency.
Would it drive the fish mad or have some effect on them.

I dont know any fish to ask.

Pete.

 

[ronv]

I think all the ones from radio shack are for audio. You need a fogger type. One from a humidifier would work.

PS. I think they just make the fish very clean.

 

[gtr_stitch]

Lol some mad clean fish