I have this circuit from the image below that I am designing myself. part of this circuit is cut so 2 78xx is present. This circuit is being designed and tested in parts. This part of the circuit has to work basically by amplifying the signal from the electret microphone, as it will also work by sounding a siren sound generated by the 555 when the button is pressed. The part of lm386 is ok, without noise. the problem is when I connect output 3 of the 555 to one end of the button and the other to input 3 of the op amp; the siren sounds very low in the background when I do this. already tried to solve even with transistor and nothing solved. does anyone have any tips on how can i solve this ?.
Thanks in advance