I would like to make usb-charging sockets from two sides of the bed, and I don't like the idea of power supply working 24/7 so I decided the following scheme to have power ON while me or my wife are charging:
But the power on my side socket will be ON, when my switch is OFF, if my wife's switch is ON (being continuously charged is not good for battery). So I have the idea to use DPST switch to also switch usb socket off:
Is it OK to use DPST switch between 220vAC and 5vDC circuits? Does it depends on it's characteristics, how to select right on? Would be there some kind of cross talk between circuits?