Here is the image of Ethernet shield near RJ45 socket:
These small boxes are probably SMD capacitors which may mean, that internal board is glavanically disconnected from the UTP line.
Is this true?
If this is true, then what will happen, if I pass
DC current just into my UTP? Won't I be able to wire appropriate conductors just into Arduino power input? Won't I be able to power Arduino this way?
The question is about not using premade PoE splitter. I have an injector, which injects
5V into line.
I found my injector put power to lines 4,5 and GND to 7,8. Can I take this power on Arduino side?