I am interested in using a magnetometer to detect objects near my house. Like cars or even lol flying air planes. Can any one suggest a magnetometer that would be sensitive enough to do that?
Sounds logical. The RPi_Cam_Web_Interface github contains motion detection of objects out of the box.simonmsh wrote: ↑Wed Nov 20, 2019 6:21 pmI tried to do a bit of car-detection with the magnetometer on a Sense Hat. It seemed to be able to detect a stationary car (1 tonne, mostly steel) at 3 metres, but not moving cars at 8 metres. It also has a fairly sensitive accelerometer, but I wasn't able to detect the ground vibrations of passing cars at 8 metres with that either. I didn't put much effort into it, so take those results with a pinch of salt. Although the Sense Hat is great for learning about sensors in general, there might be better dedicated magnetometers available at a similar price. My next attempt will involve a camera and OpenCV.
It seems MEMS accelerometers could detect traffic if they were close enough, but maybe not suited to remote sensing over many metres.