Sensors & control - other
author: Thomas Scarborough
visits: 1300
author: smartkit
visits: 876
author: RED Free Circuit Designs
visits: 671
author: Paul Stilo
visits: 520
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: 478
author: RED Free Circuit Designs
visits: 454
author: Jonathan Filippi
visits: 447
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