Sunday, 2 December 2018

Building a passive ethernet hub with anti-parallel diodes


I've found several guides online on how to build a passive ethernet hub, the design is always the same:


passive Ethernet hub by Miroslav Adzic


I'm wondering what each of the 2 anti-parallel diodes do? For both positive and negative current there's always one diode conducting, so what's the difference to just bridging the wires directly?




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