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: 48340
author: Thomas Scarborough
visits: 35623
author: smartkit
visits: 34896
author: RED Free Circuit Designs
visits: 34157
author: Motorola
visits: 32836
author: smartkit
visits: 28880
author: RED Free Circuit Designs
visits: 27915
author: (C) G. Forrest Cook 1999
visits: 24300
|