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1

Built new circuit but its failing when V1 is higher than 50V It should be be failing well below 50 V. Your circuit does not provide reverse polarity protection. Ground should be applied to the MOSFET Source terminals, so that V2 is directly connected between the Gate and Source of each FET. The circuit looks like this:- simulate this circuit – ...


1

This is more or less what I have in mind. When I use back-to-back FET's I almost always start by pulling the gates to the sources with a resistor. This is a foolproof way to make sure they will be off in normal operation. Then I go from there. In this case, D1 is needed to make sure that during reverse polarity connection no current flows through the body ...


4

If you mean live and neutral AC mains signals then live must be insulated. Neutral is supposed to be at ground potential and thus not a hazard, BUT there are numerous wiring errors and fault conditions that could make a neutral conductor dangerous. I cannot imagine a design of a product that would not insulate both. Relying on neutral being at ground ...


1

The live/phase/active wire. Except that in countries where you can connect the mains plug in any orientation to wall socket, either one of the wires could be the live or neutral, so both.


0

You can leave the unconnected caps floating, no problem. I'm surprised the design shows the cap's "+" lead facing the input.. The guitar input is biased around 0V... The base of the transistor is biased to about +1.2V... ...So I would think the caps should be facing the other way. 1.2V is a small enough voltage it's not going to hurt the caps even ...


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