Silly question of the day from the new boy 
The installation existing is an interior light and an exterior light wired in parallel via two way switching with both switch's inside the building, but in different rooms. Little old lady walks in from outside the building at present and switch's the lights on via a pull cord, the interior light goes on and she can see in the room she is in, and the exterior light goes on and everyone outside can see the room is occupied (actually that the door she entered the room by is open - same thing essentially).
The brief was to PIR both lights so that the lights turn on as she walked up the path to the building - easy peasy, I bought two Steinel sensors with the intention of leaving the lights switched on permanently but controlled via a PIR outside and one inside.
When I got to site the client changed the brief to include the PIR and a manual override switch to have the lights on via a switch or via the PIR's. My circuit head is broken and I cannot think it through correctly so that both conditions are satisfied, 1/ That the lights come on via the PIR if someone approaches the room from outside and that 2/ The lights go on if a switch is turned on
Doh!
Any ideas gratefully received - I am going to go back tomorrow and install what ever seems the best route to satisfy both scenarios, I know it can be done, I have even done it myself about three years ago, but I cannot work it out today........................... :_|
The installation existing is an interior light and an exterior light wired in parallel via two way switching with both switch's inside the building, but in different rooms. Little old lady walks in from outside the building at present and switch's the lights on via a pull cord, the interior light goes on and she can see in the room she is in, and the exterior light goes on and everyone outside can see the room is occupied (actually that the door she entered the room by is open - same thing essentially).
The brief was to PIR both lights so that the lights turn on as she walked up the path to the building - easy peasy, I bought two Steinel sensors with the intention of leaving the lights switched on permanently but controlled via a PIR outside and one inside.
When I got to site the client changed the brief to include the PIR and a manual override switch to have the lights on via a switch or via the PIR's. My circuit head is broken and I cannot think it through correctly so that both conditions are satisfied, 1/ That the lights come on via the PIR if someone approaches the room from outside and that 2/ The lights go on if a switch is turned on
Doh!
Any ideas gratefully received - I am going to go back tomorrow and install what ever seems the best route to satisfy both scenarios, I know it can be done, I have even done it myself about three years ago, but I cannot work it out today........................... :_|
