Frequencies on self oscillating circuit

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Pier Paolo Baldi

Joined Mar 15, 2017
4
Hi,
i`m not an expert in electronics, I think it`s important tell it immediatly!
I need to modify the frequency of an ultrasonic cleaner machine.
I don't know how can i do that, I looked for and red much online and I understood how it would be possible manage frequencies on an NE555, but this particular circuit hasn't a NE555 and I have no idea how to do it.

I need 33Khz, someone of you can help me?

Here is the schematic of a very similar cleaner machine that i found on Internet.

Using the following link the image is bigger
http://jumperone.com/files/2012/02/ultrasonic-cleaner-re/CD7810_Ultrasonic_Cleaner.pdf


CD7810_Ultrasonic_Cleaner.jpg
 

DickCappels

Joined Aug 21, 2008
10,152
Sorry, but this is on the list of restricted topics listed in the User Agreement..

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