I’ve a 4-40 KHz square signal into the piezo device, but I can’t found resonant.
I’m only a oscilloscope and a multi-meter to found impedance.
But when I used multi meter to measure current. Couldn’t found the maximum current.
If frequency increase and current will be increase.
In my knowledge the minimum impedance means current will be maximum.
Seem like I’m mistake......
So if only oscilloscope and multi meter could found resonant frequency?
Thanks for your help....
I’m only a oscilloscope and a multi-meter to found impedance.
But when I used multi meter to measure current. Couldn’t found the maximum current.
If frequency increase and current will be increase.
In my knowledge the minimum impedance means current will be maximum.
Seem like I’m mistake......
So if only oscilloscope and multi meter could found resonant frequency?
Thanks for your help....