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 !
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 !
Are you buying them from a well know distributor? If so, return them and get the ones you ordered.
Paul
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.
seem to be going round getting the same\similar ones with a different numbers
Can you give some examples?
You need a "RATIOMETRIC" (or "LINEAR" ) sensor, Hall effect SWITCHES are more commonly used so maybe thats what you have been getting. Sometimes (as below) they are incorrectly described.
The SS49E or AH3503 are LINEAR sensors and will likely do what you want depending on the sensitivity you need.
I believe the AH3503 to be more sensitive but the data sheets arent directly comparable.
Also be VERY careful connecting them as some data sheets dont show the connections clearly.
Not all linear sensors are ratiometric, note. The place to find things like this is
using the parametric search tools at various major electronic suppliers websites.
yes its is the ss49e which I got a few of now the voltage will change one way, but now the other. I need it change 3 ways, high, neutral and low.
Thanks for your help.
Post a drawing showing how the magnet is moving in relation to the sensor.
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