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: 47249
author: Thomas Scarborough
visits: 34037
author: smartkit
visits: 33409
author: RED Free Circuit Designs
visits: 32741
author: Motorola
visits: 30978
author: smartkit
visits: 28177
author: RED Free Circuit Designs
visits: 26759
|
Audio
