just use a voltage divider, or a current divider. voltage dividers are better cause they dont waste electricity, but current dividers do.
or... just use a resistor...
or... just use a resistor...
But it will heat up. Even if only a few milli-Celsius -> power dissipation -> wasteIf you pick the right resistance it wont heat up as much
When you short the resistor then there is no voltage divider and there is no load.