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: 47474
author: Thomas Scarborough
visits: 34291
author: smartkit
visits: 33602
author: RED Free Circuit Designs
visits: 32954
author: Motorola
visits: 31224
author: smartkit
visits: 28371
author: RED Free Circuit Designs
visits: 26988
|
Audio
