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  • Sensor Sense: Passive Infrared-Motion Sensors
    Passive infrared (PIR) sensors detect infrared energy radiating from objects within their field of vision. Unlike infrared optical sensors that use an LED transmitter and IR receiver, the PIR emits nothing. As its "passive " name suggests, it responds only to infrared energy radiated by the object
  • Introduction
    resulting from current flow in a fuel cell. The text concludes with Chapter 13 on passive electrical circuits. QuickField includes a CAD-based electrical circuit simulator that simulates circuits with AC or transient time dependence. Applications include filter circuits and equivalent circuit models

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