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news from the lab…
Network cable tester
Categories: gnusb



I’m currently finishing (hopefully) our new twisted-pair-(Cat5, ethernet cable)-based intercom/tally system for our tv projects:¬†communication, data and video all over one network cable (more on this soon) – and I stumbled over several CAT5 cables in our bin that were either damaged or wired the wrong way or simply crossover cables that messed up the testing of the system.

So I quickly hacked together this little device to see if the cables are wired ok. Like almost all of my stuff, it’s based on the gnusb (the atmega644 is a little bit overkill for this project, but that’s what I have lying around).

Just plug in a cable and if all 8 leds light up it’s good. If not, you can press the button and see which end of the 8 wires is connected to which other..




It’s dead simple.source code and schematics:¬†rj45Tester

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