Power over Ethernet (PoE) Lab and Experiment

Let's learn about PoE!
How does a PoE switch know when to provide power to a device that needs it?
Learn the magic of the 25k ohm resistor.
And what's the difference between passive and active PoE? Or Midspan, Endspan, Type A, Type B?
The answers are here.

[@kofidonkor151]

Thank Yoooooooooou for this video.

[@drallersouldust3054]

Do you know a Gigabit adapter injector? I can't find one that is cheap also looking for a solution with the cable line end if I choose to use poe switch then the other side needs a stepdown to 12v but the problem is I hate to use injector splitter because the power maybe unreliable cause the wifi or the accesspoint to messed with the signal and IP addresses . that's why I'm also looking for a stepdown that I can attach before the balun connector