need help with lm386 amp?
I use a AC to DC adapter (output DC 9V 200mA) as the power source, 8ohm speaker( the sharp 939 speaker).My stratocaster or mp3 player as the input.
I have some problem with it :
1.I want to add a volume control , but i don't know what volume control should i use (resistor value) and where to put it (before the cap 220uF or after the cap)?
2.I want to add a gain control(for distortion effect), but some people use capacitor, some people use resistor.What should i use ?
3.When i plug in my Guitar, the speaker starting to noise, but when i touch the guitar string,a metallic or the GND line, the noise disappear.How can i slove this problem ??
4.What the pin7(bypass) of the LM386 use for and how can i use it ??
Thank for advance!
Sorry for my bad English. :(