Audio amplifier

by luigihs
Tags: amplifier, audio
luigihs is offline
Nov14-12, 07:17 AM
P: 86
Hello people Im doing an audio amplifier, but im really stuck in the circuit because the 1uF capacitor (C2 )doesnt work properly next the the potentiometer , but if I took off the Capacitor C2 I can hear music through my speakers, but with really bad quality. I dont know what you can recommend me guys thank you!

This is my circuit
Phys.Org News Partner Science news on
Better thermal-imaging lens from waste sulfur
Hackathon team's GoogolPlex gives Siri extra powers
Bright points in Sun's atmosphere mark patterns deep in its interior
CWatters is offline
Nov14-12, 08:54 AM
P: 2,861
If you have C2 = 10nF that might explain it. Correct value shown on the circuit is 10uF.
luigihs is offline
Nov14-12, 09:03 AM
P: 86
SOrry I got confused but I still doing right, the value of C2 that is 1 uF it doesnt work when is connected with the potentiometer only if I take off the C2 and connect the C2 next to pin 3 would be working , but with bad quality audio. I do this circuit so it should be errors nobody provide me an example.

aralbrec is offline
Nov14-12, 12:04 PM
P: 296

Audio amplifier

It's really hard to say what is going on without knowing what is inside that IC.

I don't see any external feedback so I don't know how you are selecting gain, unless that IC is a power amplifier at fixed gain. Without seeing any feedback, the input bias current on pin3 may be causing the output to saturate.
CWatters is offline
Nov15-12, 07:39 AM
P: 2,861
I can't make out the part number on the IC either. LM0??

I assume you have tried the obvious and set the potentiometer to the middle of it's range? They are frequently supplied set to one end.

In addition to the IC number it might help to know what the source is?

Register to reply

Related Discussions
audio amplifier design Engineering Systems & Design 5
audio amplifier circuit Electrical Engineering 8
Impedance of an emitted audio amplifier Engineering, Comp Sci, & Technology Homework 2
Why does a buffer is used in an audio amplifier? Electrical Engineering 13
Need help with a 12 watt Audio amplifier Electrical Engineering 13