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A voltage divider alone will never be able to step a lower voltage up to a higher one.If we combine that with a static resistance somewhere in the middle - say 5.6kΩ, we can get a wide range out of the voltage divider they create. Many of those sensors operate at a relatively low voltage, in order to conserve power.Unfortunately, it’s not uncommon that those low-voltage sensors are ultimately interfacing with a microcontroller operating at a higher system voltage.A potentiometer is a variable resistor which can be used to create an adjustable voltage divider.
Internal to the pot is a single resistor and a wiper, which cuts the resistor in two and moves to adjust the ratio between both halves.
Basically, don’t use a voltage divider as a voltage supply for anything that requires even a modest amount of power.