Question: Do "current+old" generation desktop pc's have any built-in means of registering a signal that is modulated on a (220v) AC power output?
Application/context: Suppose your energy company modulates a signal on your 220v/230v AC house/building power supply, is there any way to guarantee the desktop uses that powersource in stead of another powersource without using additional hardware?
I thought it might be possible, if power supply units (PSU)'s have an input voltage sensor which is somehow fed into the motherboard somewhere, before they cancel out all the fluctuations to provide the CPU with a constant DC voltage. But I am not aware of any such sensors and thought perhaps my view/solution space is too limited.
Initially I thought perhaps another approach could be be to set up an extra (USB) measuring device that measures the 220v signal, but that still has 2 problems:
- There would still be the loophole of the usb device measuring the signal but the desktop actually consuming a different power source.
- It requires additional hardware which is beyond the scope of the question.
As a response to the questions in the comments, I would like to clarify what I mean with:
Suppose your energy company modulates a signal on your 220v/230v AC house/building powersupply,
I mean that an additional signal is added to the normal/conventional electricity net, by changing the hypothetical pattern* that the normal/conventional electricity network uses, with the function of/by adding another signal. I am not claiming they can but I'm assuming the hypothetical case that they do. A bit like the powerline adapters, except the adapter connected to the router would be placed somewhere before/outside the house by the energy company.
*For the purpose of this question I assume the normal/conventional electricity network follows a pre-determined pattern/signal.
desktop uses that powersource in stead of another powersource
I mean that, suppose if the neighbors have a different additional signal/no signal in their house than you, that it is not possible for the your pc, to register your signal from your households 220V AC electricity network*, while it is actually connected via a long cable to the wall socket of your neighbors building.
*Of course an external device could be made to register a different signal coming from whatever, but that is not intended here. The question is about a sensor already present in the pc, that without physical modification/non-intended-hacking would indicate the PSU uses/consumes/is connected to the electricity network with the registered signal.