Simple Electronics Projects

By | February 28, 2016

Infrared Motion-Sensing Relay Switch

This circuit is designed for use with all kinds of medium-power automobile/domestic 12V DC loads. It is a simple solid-state relay (SSR) switch, controlled by a standard passive infrared (PIR) motion sensor module. A PIR sensor is an electronic device that can measure IR light radiating from objects in its field-of-view.
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1 Time Only Alarm –  This alarm is designed to sound its Siren only once. That is – when the alarm is activated – the Siren will sound for a preset length of time. Then it will switch off and remain off. The alarm will not re-activate.The basic circuit has a single zone with independently adjustable Exit and Entry delays… [Circuit designed Ron J.]

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