Non EE here (but a frustrated wannabe). In general, if you want to have a 'destination' voltage of 5 volts and the circuit has a drop of 1 volt, could you not supply 6 volts and solve the issue? Of course this assumes you have the flexibility to power the wire with the voltage of your choice. I'm thinking of how I can power Nest cameras in the outside corners of my house where there is no 120v outlet, but there is CAT6 wiring for cameras. TIA for your thouhts.