I don't quite see what it's doing
. Also, what exactly does "couple" (as a verb) mean? I've seen it used frequently- "capacitively coupled", "couple the pot to", etc. but can't quite figure it out.
I don't fully understand
. Feedback from the speaker? Filter like an RC circuit?
The speaker is an inductor. Inductors have a high impedance at high frequencies. The IC is designed to work with an 8 ohm load and goes crazy if the 10 ohm resistor is not its high frequency load. The 0.05uF cap couples the AC without passing the DC.
Erm, what?
There's that couple word again
. Does that mean the output from the amplifier is AC? Or..?
A capacitor couples an AC signal from one stage to another stage, or sometimes from the output of an amplifier to a speaker. Couple also means to pass.
One general question covering all of the caps is this- why those specific sizes? I suppose the 1uF makes sense, but what about some of the others? Is it about the time it takes to charge them?
A capacitor has impedance which depends on its value and on the frequency. The impedance of the 470uF output capacitor at 100Hz is 3.4 ohms so most of a 100Hz signal will go to an 8 ohm speaker, but at lower frequencies the cap will have a higher impedance and less lower frequencies will go to the speaker.
Thanks for your time, its really nice that you guys are helping!
Glad to help. We are just a bunch of
really nice guys!