Microphone 48v improved

@misaki_david

8 years ago

https://everycircuit.com/circuit/6243766892756992

From left to right : 110v 60hz noise with 200k insulation Ground Shelled switch 100pf cap as microphone OP Amp 1 Main amplitude adjustment VR 1 OP Amp 2 with amp config VR 2 Speaker Amp 16 Ohm Speaker