On-board LM393 voltage comparator chip and hall sensing probe, support 5 V / 3.3 V voltage input.
On-board signal output, the output signal is effective instruction low level and at the same time, the output signal lights out can be directly and single-chip microcomputer IO connection.
Signal detection sensitivity can adjust.
Reserve all the way more circuits (P3 voltage drawn).
PCB board size: 30 (mm) x15 (mm)