Customers can pre-order menu item, and when they are within a zone timed to food and beverage preparation, a 'proximity tag' is triggered alerting the restaurant to start prepping. October 9, 2014 ...

Inductive sensors are non-contact proximity sensors that detect ferrous targets, ideally ones made of mild steel thicker than one millimeter. They consist of four major components: a ferrite core with ...

Two tiny ICs and a few passive components can yield a capacitive proximity sensor with excellent sensitivity and extremely fast response time. The circuit’s operation leverages the pulse-front-edge ...