Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Micro switch on the door. Door open, light off, door closed light on. PIRs sense a change in temperature, so if you don't move thing forgets you are there. Pressure pad under floor? Infra red beam shooting right across the room?
When in room is no one, light also will turned on? And if I want to with this sensor turns on ventilation in the washroom, some time after the appearance of man, and on condition that he spent some time there.
You can of course turn the light on even button operation, but what if the door is accidentally opened and closed twice? Or the door has been left open...