hey all, im kinda new in a word of electronics, so im learning now how amplifier works. now i found this circuit that shows a sample of it. but then i saw a very weird method of using electrolyte capacitors. as far as i know, capacitors can charge voltage into them selfs to stebalize the voltage and i know that its NOT conducting any voltage between the pins. now check out that circuit that i found and tell me whats wrong what that..
hey all, im kinda new in a word of electronics, so im learning now how amplifier works. now i found this circuit that shows a sample of it. but then i saw a very weird method of using electrolyte capacitors. as far as i know, capacitors can charge voltage into them selfs to stebalize the voltage and i know that its NOT conducting any voltage between the pins. now check out that circuit that i found and tell me whats wrong what that..
The circuit you posted is a very common LM386 amplifier circuit with a gain of about 20, the fixed gain of the LM386. The capacitor C5 is the audio output coupling capacitor and does what Nigel says it does.
Coupling capacitors are used to block D.C. (D.C. = bad Ju-ju) , and pass A.C. (A.C. = the music signal).
The circuit you posted has two things wrong with its capacitors:
1) C1 is usually a 0.1uF to o.33uF metalized plastic film capacitor that has no polarity because it has no DC voltage from the LM386 amplifier, not a polarized electrolytic type.
2) C3 is usually a polarized 10uF electrolytic type because pin 7 has a positive DC voltage.