This circuit was found in the June 1991 issue of Radio Electronics magazine. The circuit uses two Hall effect sensors of the time. It can be assembled using modern equivalents.
Circuits similar to this appear elsewhere in this section. The transistors can be BC549 (low...
Indicated to be used at the sensor input of a PC, this circuit was found in an English...
July 2017 - Mouser Electronics announced the availability of Littelfuse's GEN2 series Schottky...