MEMS, in general, is a marvel in its own right. The idea of reusing the planar process that's used to make normal ICs, but to measure physical movement is quite an engineering hack.
Can you look at the cheap ali icm20948 breakouts? their mag compass does not work without 1.8v level shifting and i'm wondering if it just low quality pcb planning and if the imu chip on it is real/fake/recycled/salvaged
