I need to measure (and record changes over a short time) the angle of a lever at a sub-degree resolution (The fulcrum can be the sensor) using an Arduino.
I've looked at rotary encoders, but even those with no detents have about 24 pulses per rotation. I need to measure only across a 90 degree arc. 24 pulses per rotation is 15 degrees per pulse. Which I guess results in a measurable resolution of 7.5 degrees!
I could add gears to increase the turns on the encoder, but that would increase the force required to move the lever.
Is there an option I'm not thinking of?