sthomas229:
Hi there – would like some help in finding some linear hall effect sensors, seem to be going round getting the same\similar ones with a different numbers. I need a hall effect sensor which when the magnet is neutral position the reading would be 2.5v, when the magnet moves up, the reading goes, and when the magnet is down the reading is down.
I believe that is a Ratiometric Linear Hall Effect Sensor but I can not get the right ones, have got a big bag of the same ones !
I bet the ACS711/ACS712 sensors would work for this quite well, as they are hall-effect current sensors,
and are available in mid-rail zero versions. I think they are ratiometric too, but check the datasheets.
They internally have a hall sensor and a copper bar that's used to turn the current into magnetic field,
but I'm fairly sure they pick up stray magnetism too.