Continuity tester

I need to learn Continuity teter , how can I build an app without using Ardino

what's this?

1 Like

Continuity teter just reads if comm port (mike and Ground ) , wires are connected to eah other.
if wires ae connected app should read Pasd else It should read Fail. or so.
This tester is used to test eletronic circuits like a
volt meter or multi meter.

Or in a simple way if a headphone jack is inserted in mobile it should notify a "Pass" else " fail"