5volt hall effect potentiometer, use on a 3.3 volt board

Other Hardware Sensors
1

I have some hall effect potentiometers to replace normal mechanical pots in a few projects that keep wearing out.

https://www.mouser.co.uk/ProductDetail/858-6127V1A360L.5FS

They need 4.5 - 5.5 volts to work (they do not do anything when given 3.3v) and output a varying voltage from 0.25 to 4.75v depending on the shafts position.

i'm playing with 3.3 volt boards a lot more lately (ESP32s3, STM32f blue pill etc) so i need a way to change the voltage output from the hall effect pots when they are given the 5 volts needed for them to work.

would a simple voltage divider using a pair of resistors be enough, or should i be looking at level shifters / converters, i've seen that most level shifters are intended for i2c things which i imagine are digital voltages, i.e. on and off pulses rather than a varying voltage.

The potentiometers are in controllers connected to the computer for a driving simulator, so some move pretty slowly and only get moved occasionally, others move all the time rapidly.

i want to get as much resolution from the potentiometers as i can, they already have a slightly limited output compared to a mechanical pot, i.e they never got to zero or full voltage at the ends of their travel (well these ones have no end stops, they can safely rotate constantly, they just flip from outputting 4.75v to 0.25v when you pass 360 degrees)

I mostly want to be sure i can never send more than 3.3 volts out to the boards that can not handle 5 volt inputs on their analog pins.

2

And then there is the loss of ratiometric behaviour when converting the 0.25volt-4.75volt output range to a 3.3volt range. The output values not only become dependent on pot position, but also on 5volt and 3.3volt MCU supply voltage variations.

3

Use a level shifter.

4

ordered some level shifters to have a play with.

ideally i'd use a 3.3 volt hall effect pot, but it's hard enough to find them with a D shaft and the usual pot mounting style of a thread around the shaft bushing (so it's easy to swap regular contact style pots for these)
So finding hall effect pots with the right input voltage i want is almost impossible, not to mention the price of these things.

5

The resistor divider will work very well. You have an offset to work with. You will need a - supply or op amp to null it out. But you can also simply treat it as an offset in your readings. If you get level shifters be sure they are analog, personally I know of none. Let us know what you find.