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: 46727
author: Thomas Scarborough
visits: 33459
author: smartkit
visits: 33023
author: RED Free Circuit Designs
visits: 32261
author: Motorola
visits: 30353
author: smartkit
visits: 27652
author: RED Free Circuit Designs
visits: 26325
|
Audio
