I dont have a lot of smarts on circuitry design, so this is more of a can i do it, and what should i look at using or is there is a current solution.
basically we have some wireless PIR's with our security system that run off 9v batteries.
The batteries go dead usually at night time around 3am, and im trying to see if i can power the PIR with a power adapter (wall wart or similar, hopefully wired to a central location up to 20 metres away. (some are closer, around 2-5 metres)
I was hoping basically to have the PIR wired to a cat5 cable, (just because we have lots) and then run that in the wall or in conduit to a cabinet where the adapters would be, or even have one PCB or device that powers all the PIR's... as in 1 x 240v unit that isolates and distributes the 9v to each PIR individually.
any ideas or can anyone steer me in the right direction.
Update i was talking to an electronics guy and he said that i have to be careful about the wire becoming a radio antenna, and affecting the transmission to the control unit with power fluctuations. he mentioned about checking if the PIR has power filtering built in, otherwise it could be another reason for using batteries in the PIR's... i.e. batteries are in there, so they dont add the filtering...
So i have to look into that with the manufacturer.