I think this circuit is what I need, but I need some help modifying it to suit me. What I am wanting to do is to connect a 40-50 step voltmeter to the subwoofer in my car, so that the bar would go up as the speaker output does. The PDF sheet the circuit was on said it could be expanded to 100 steps but I don't know to do that. The subwoofer is 300w RMS at 2 ohms, therefore 24.5 volts, but peak output is double, so 49 volts peak. Speaker output is AC so it will need to be rectified first. I've got basic electronics skills but not enough to design the circuit myself.
Thanks in advance,
Tim
Thanks in advance,
Tim