Circuit Diagram Experts Needed. Thanks. Answered
(I posted an image)
I found this circuit in an book of mine because I wanted to build a VU meter. I only want to simplify this circuit. I don't need sound coming out of the VU meter; so I could have just remove the speaker and be done with it. But... is there anything else in the diagram that is only related to the speaker in which I could remove? All I need from this circuit is the led reacting to the audio input like a VU meter. Eliminating unnecessary parts will help me make it smaller. Thanks!
Helpful things to know about diagram:
Ignore R1, C5, U2.... those are just references to another diagram.
324 is an Operation Amplifier IC (there is only 1)
546 is an Audio Power Amplifier IC (there is only 1)
the Si is a silicon diode
the VR is a 50k ohm control volume (potentiometer?)
6 volts going in
Ignore the funny looking earphone, thats the audio input instead.
I posted one General Image and 4 close up Images.
Any other question about the diagram feel free to ask.
Once Again Thank you for helping a newbie.