I just finished the assembling of an amplifier with a LM386. All worked OK when I provided filtering to power supply. Key point was a .01 ceramic cap.
My questions:
A) What is the actual use of pin 7 (bypass)?
In most of the suggested circuits the baypass capacitor is shown as optional. When and how much to use?
A 10 uF cap is shown somewhere but in a circuit provided by Audioguru I recall there was a .1uF used instead. In my case I used 10 uF but without it, I found no difference.
B) What is the correct way to control volume at the speaker? By changing gain (R in series with cap between pins 1 & 8 or increasing/decreasing the input level? The last option seemed easier to me.
C) In what application the specific use of inverting and / or non inverting inputs would be relevant?
Datasheet here: https://www.ti.com/lit/ds/symlink/lm386.pdf
Thanks for any help.
My questions:
A) What is the actual use of pin 7 (bypass)?
In most of the suggested circuits the baypass capacitor is shown as optional. When and how much to use?
A 10 uF cap is shown somewhere but in a circuit provided by Audioguru I recall there was a .1uF used instead. In my case I used 10 uF but without it, I found no difference.
B) What is the correct way to control volume at the speaker? By changing gain (R in series with cap between pins 1 & 8 or increasing/decreasing the input level? The last option seemed easier to me.
C) In what application the specific use of inverting and / or non inverting inputs would be relevant?
Datasheet here: https://www.ti.com/lit/ds/symlink/lm386.pdf
Thanks for any help.