component tester

Hello guys! I'm trying to build a small circuit that can detect a faulty microphone or an intermittent microphone. It is meant to be used with lavalier microphone. So I asked chat GPT for ideas (yes aha) and it came up with this. Does it make any sense? I tried to put it quickly on a breadboard...

While measuring a mains capacitor in haste, I forgot to discharge it first and ended up damaging my component tester! Before anyone says it, yes I know I should have discharged the capacitor first! Anyway, I have replaced the ATMega328P microcontroller but I can't seem to find a firmware...