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  1. Hi There, Long time since I've been here so I might have missed something, sorry for that. I'm figuring out a way to evade the use of the CR123A batteries since they are quite expensive and have the flaws off being empty ;) And the use of batteries at all being not that environmentally friendly. The Idea I have is this: In my (new) home, I'm going to have a Fibaro Motionsensor in every room corner. In this corner, about 30 cm above the floor, I have a 220v socket. Im going to drill a extra hole next to it and place a empty flush mounted box there with a blind plate on it. In the box will come a AC-DC 220v to 3.3v Stepdown regulator (Mean Well IRM-02-3.3 AC/DC). Via a (in wall) Cat6a UTP cable I plan to transport the 3.3v to the upper corner of the room with the motionsensor. I know the CR123A is 3v but I'm guessing the cable might drop the .3v in transport. The maximum cable length shall be no more than 3m. Else I need to have a stepdown 3.3v to 3v in the motionsensor. In the place where normally the CR123A comes I plan to 3D print a 'fill- up' part to connect the wires to the motionsensor. So in case of a flaw I do not need to solder in a corner 2,6m high. ;) My questions here: - Anyone did something like this, power the motionsensor via wallpower of any kind? - Someone know the maximum length of a 3.3v cable - Any other ideas or segestions are welcome I plan to make a 'how to' here, so if you are interested come back later. :D
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