First off, I only have really basic knowledge of circuitry. I want to know if there is a way to split an audio signal so part of the signal can go through a separate circuit while the other part goes directly to the speaker. Right now, as I would assume, the signal just bypasses the circuit and goes straight to the speaker.
So currently what happens is the circuit takes in the audio signal, amplifies it, and outputs it to the LED. This does what I intend it to do, which is to pulse with the audio signal. However this leaves nothing for the actual speaker to output, which is why i'm trying to split the signal so that part goes to the speaker as well.
In his previous thread he was told to eliminate the 1k resistor and I posted an LM386 circuit that has the proper supply bypass capacitor and has the negative input biased to turn off the LED without signal. It even has a peak detector circuit so that the peaks of the music are clearly seen.
The positive and negative audio inputs are new to this thread and need an explanation as follows:
"Splitting"? If the positive input is from a speaker then the gain of the LM386 is too high and should have an input volume control as was shown twice in the other thread. The input to the volume control to the LM386 draws such a small current that splitting is not required. Just connect the input to the volume control to positive wire of the speaker.
The negative wire of the speaker is ground if it is a home stereo and connects to the ground of the LM386. If it is in a car then the negative wire of the speaker is also driven from the output of an amplifier then the ground of the LM386 circuit should be connected to the ground of the amplifier.