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Ty_Eeberfest wrote: Actually, I just noticed that on the schematic the voltage called "VIN" is after D1. So if you read from the anode of D1 to ground you will see the voltage your power supply is putting out. If you read from the cathode of D1 to ground you will see power supply voltage minus a diode drop, which is what is being called "VIN".
Ty_Eeberfest wrote: Okay now I see your point. I suppose the text could be changed to make it clear that the readings are to be taken relative to ground.
Speaking in general terms, it is considered to be understood that voltages are measured relative to ground unless specified otherwise. To me it's obvious but I have been doing electronics for many years. I can see how it wouldn't be obvious to someone who is new at this.
Ian is the maintainer of the manuals. Let's see what he has to say.