Sensors & control - all subcategories
This circuit emits a beep and/or illuminates a LED when someone touches the door-handle from outside. The alarm will sound until the circuit will be switched-off.
author: RED Free Circuit Designs
visits: 47823
author: Thomas Scarborough
visits: 35350
author: smartkit
visits: 34034
author: RED Free Circuit Designs
visits: 33783
author: Motorola
visits: 31763
author: smartkit
visits: 28615
author: RED Free Circuit Designs
visits: 27363
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