Subscriber John Schuch writes:
Threads on the MAKE forums often touch on hall effect sensors for measuring current, position, speed, etc. I just got this link in an email this morning and think it’s pretty cool. Gotta love free technical training.
This is a sponsored tutorial on Digikey, sponsored by Honeywell, and promoting Honeywell’s line of magnetic sensors, but there’s still good info here. And the narrator sounds vaguely like Fox Sports announcer Joe Buck, if Joe Buck were a deep geek.