Low cost Under 5$(USD).
Don't use green marked diode(i used it to show you the real sign of hexfet mosfet)
Use IRLZ44N as mosfet.
Use113KHz piezo disc as purple marked volt meter.
I made this circuit.This circuit is working fine.!!!!!
Please comment high five emoji if you made it real!!🖐
Here is the Circuit Diagram
https://photos.app.goo.gl/zE8A6fHugzMrRLLe9
Here is the link for 113KHz piezo disc http://s.click.aliexpress.com/e/cSCAXq3I.
