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: 47483
author: Thomas Scarborough
visits: 34302
author: smartkit
visits: 33605
author: RED Free Circuit Designs
visits: 32966
author: Motorola
visits: 31228
author: smartkit
visits: 28378
author: RED Free Circuit Designs
visits: 26995
|
Audio
