Sensors & control - all subcategories
author: RED Free Circuit Designs
visits: 2646
author: Jonathan Filippi
visits: 2399
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: 2176
author: Paul Stilo
visits: 2024
author: RED Free Circuit Designs
visits: 2023
author: Andy Collinson
visits: 2002
author: RED Free Circuit Designs
visits: 1983
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