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: 48996
author: Thomas Scarborough
visits: 36539
author: smartkit
visits: 35405
author: RED Free Circuit Designs
visits: 34903
author: Motorola
visits: 34136
author: smartkit
visits: 29499
author: RED Free Circuit Designs
visits: 28459
author: (C) G. Forrest Cook 1999
visits: 25113
|
Audio
