When you are making something for yourself only, it is usually very tempting to make a one-time stuff that only you will know the details. ( so is it ok to use the tl072 or do I have to use a single opamp?) I keep using tl072 because I already have the chip if its a case where there will be a problem using it in the way I have it here then I would have to search for a tl071 as you said. You asked why do I think the amplifier has two output, it has 2 screw terminals just like any other amplifier I have ever seen in my life that you connect 2 speaker wires to, so that connector with 2 screw terminals is where I planned to connect the vu meter and also the 2 wires from the speaker. ( So what I did was the place them at the start of the peak detector circuit, and it seems that was wrong so how would I do it.) The first schematic on this topic I showed had a 10k resistor going to pin 5 of the Lm3915 and another 10k resistor from the same pin 5 going to GND and you said that was the attenuator so I assumed putting back those components in the circuit would be the attenuator if not then what is it that I should do to reduce the 56v. But instead I could have copied and pasted a pot from another schematic. I copied and pasted your pot into Paint then turned it 90 degrees so it is standing up awake instead of lying down sleeping. Your Eagle schematic is missing a dot where there is a connection in most places so it is confusing when a line crosses over or connects to another line. I don't use Eagle to do schematics, I use Microsoft Paint program instead where I can copy and paste parts from datasheets, from your PDF schematics or from any other parts library. Do you want the LED VU meter connected to the main 5k volume control then when it is turned down most LEDs will be turned off or do you want it connected to the input of the 5k volume control so it always shows the levels of the input signal? Or do you want to attenuate the speaker signal and connect it to the LED VU meter to show amplifier output power? The LM3915 has the LEDs 3dB apart so the 10th can show 400W, the 9th would show 200W, the 8th 100W, the 7th 50W etc.
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