The audio EQ (part 1 LM386)

Hey, the first part is done. I made a audio amp with LM386 (it is kinda similar as the my previous circuit LM386 + MIC) it uses a 3.5mm audio input jack (tested it with a phone and PC) and as output a crappy speaker (planing to get a decent one for the finishing).

So far the schematic looks like this (PDF):

https://www.dropbox.com/s/fu7xfdqfm15psxo/Equalizer.PDF?dl=0

• The Resistor (R4) doesn't have a value because it depends on what kind of a speaker your hooking. The values are in the LM3915 datasheet (26 page).
  http://www.ti.com/lit/ds/symlink/lm3915.pdf
• My schematic has a bass booster (it is not necessary)
• The gain is 20, you can increase it by attaching a cap between 1 and 8 pins of LM386. The details are on LM386 datasheet http://www.ti.com/lit/ds/symlink/lm386.pdf

From now on I am using Altium designer for schematics or Multisim for simulations.

As usual here is the photo of the first part working.
I didn't have any 220uF caps with bigger that 10V, so I used 1000uF :D I'll get some later :D

And a video (I should start talking in the videos :D wouldn't look so creepy):

https://www.youtube.com/watch?v=Id92W70uvvI