I have a question I've bought a cheap ultrasonic cleaner from amazon and when it arrived the circuit board broke free from the plastic standoffs it was mounted to. So I was forced to have a peek inside and couldn't help but notice that there was a free spot for what I assume to be a resistor between the coil input and the output to the transducer the way it's set up right now, the coil is in series to the transducer. can I increase the power by adding a resistor? It's advertised as a 120W unit but only delivers 80 Watts, so I suspect something just went wrong during assembly. there's the text "5.1R" written in the free spot, I suppose this is a resistor with 5.1 ohm, right?
So I used this circuit for the frequency ( www.google.com/search?q=ne555+40khz&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjwrMrmuenjAhUPOs0KHXU1DZYQ_AUIEigC&biw=1920&bih=969#imgrc=B4sAW7R46mZYzM: ) and connected the output to a MOSFET driver to 2x 400V MOSFETs with a supply of 60V and the output to the transducer/inductor in parallel and that to ground. Sorry for not drawing it out.
Did you wind that coil yourself or did you pull it out of a supply?
I have a question
I've bought a cheap ultrasonic cleaner from amazon and when it arrived the circuit board broke free from the plastic standoffs it was mounted to.
So I was forced to have a peek inside and couldn't help but notice that there was a free spot for what I assume to be a resistor between the coil input and the output to the transducer
the way it's set up right now, the coil is in series to the transducer.
can I increase the power by adding a resistor?
It's advertised as a 120W unit but only delivers 80 Watts, so I suspect something just went wrong during assembly.
there's the text "5.1R" written in the free spot, I suppose this is a resistor with 5.1 ohm, right?
Will make the circuit scheme available?
So I used this circuit for the frequency
( www.google.com/search?q=ne555+40khz&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjwrMrmuenjAhUPOs0KHXU1DZYQ_AUIEigC&biw=1920&bih=969#imgrc=B4sAW7R46mZYzM: ) and connected the output to a MOSFET driver to 2x 400V MOSFETs with a supply of 60V and the output to the transducer/inductor in parallel and that to ground. Sorry for not drawing it out.
Your approach and scheme is not working.
Can U tell me Is 40 khz ultrasound harmful for body?
If harmful what the harmful side!
Please clearly say!
I think it is not. Because some spa uses this to break fat cells.
Plz send me circuit diagram