3D printer accessories would use machinery Endstop, but the mechanical precision was not so precise as we imagined, so we released the Hall Endstop, which is very accurate and easy to use . Hall Endstop is a stopper sensor based on the magnetic field, when faced with the magnetic field, the digital port will output low level, and the LED will be on.

Operating voltage: 3 ~ 5VDC

Developed by blddk, this version of the hall endstop sensor is a magnetic-field based endstop sensor for RepRap. The Cheap-O is among the most accurate, cost-efficient solution for endstops. No longer must you worry about long-term bending on mechanical endstops or their questionable repeatability. It's easy to assemble, compact, and reliable.