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picbits said:Stick some 10nf, 100nf, 1uF and 10uf capacitors in parallel with the fan and see if that helps.
The 7805 regulator needs to have a 7.5V minimum input voltage or it drops out. When you turn up the volume then the LM386 amp uses more supply current. Your supply cannot keep its voltage up above 7.5V when it supplies this much current.moody07747 said:if I turn the volume knob anywhere past 2 o clock the fan starts to slow down a little and I get some noise out of the speaker.