I want to use a hall effect sensor to detect when a door is close or not; the sensor would be in the door frame, and a little permanent magnet would be on the door. However, I learned that the sensor I got is latching: at first it outputs
0, when I bring the magnet in the right direction it turns
1, and when I remove the magnet it stays
For my project, I want the sensor to turn
HIGH only when the magnet is close to the sensor. To solve this, I could probably get a different non-latching hall effect sensor, but I wanted to know if there was a way to do this with the current sensor I have.
I thought about using a 2nd magnet that would by default make the sensor output
0, but would not be powerful enough to compensate the field generated by the magnet on the door.
Better ideas? Is it worth it?