Editing Hall effect sensor (section)

=== Two-wire interface ===
Hall sensors normally require at least three [[Lead (electronics)|pins]] (for power, ground, and output). However, two-wire ICs only use a power and ground pin, and instead communicate data using different current levels. Multiple two-wire ICs may operate from a single supply line, to further reduce wiring.<ref>{{Cite web |last=Burdette |first=Eric |date=2021-07-08 |title=AN296233: TWO-WIRE AND THREE-WIRE SENSOR INTERFACES |url=https://www.allegromicro.com/-/media/files/application-notes/an296233-two-and-three-wire-sensor-interfaces.pdf |website=[[Allegro MicroSystems]]}}</ref>