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: 47658
author: Thomas Scarborough
visits: 35080
author: smartkit
visits: 33902
author: RED Free Circuit Designs
visits: 33564
author: Motorola
visits: 31524
author: smartkit
visits: 28434
author: RED Free Circuit Designs
visits: 27181
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