I am working on a project for university measuring the extension of a cars suspension.
I have a potentiometer available to me, but have a few questions regarding how to use it. I understand that it acts as a simple variable resistor, however, how is the changing resistance used to measure extension?
I was told a voltage reading was used in some way to give an extension (unsure of this) but if V=IR, will V not be constant due to battery, and will I not decrease as R increases as it resists the current?
I need a way to collect this data and then transmit it 50m and display it. I'm unsure of how to collect the data (and what data I'm collecting, resistance/extension) and transmit it. But I'm thinking of using an Arduino to receive the data and display it on a monitor.