This could come in handy for my USB industrial smelting oven
Useless, you can’t charge from USB-a!
(Seriously, it would be a fun project to stuff a USB powersupply in the 400v plug and a add a USB-c cable to mess with people at work… I’d do it but we only have 230v 3-phase outlets and that plug is probably too small.)
Fun fact: usb uart to audio jack is actually a thing: https://ae01.alicdn.com/kf/HTB1G43QaOnrK1RjSsziq6xptpXaN/win8-10-android-mac-pl2303hxd-usb-uart-ttl-to-2-5mm-audio-jack-serial-adatper-cable.jpg
Some older android phones used the audio jack double duty as a serial debug console, the nexus 5 for example.
You can turn literally any signal into another it’s great.
Yes, it’s awesome!
You could use it if you had another one with a female headphone jack. You could play your music to a speaker in another room if you have Ethernet in both rooms. Copper is copper.
While, as you said, both wires will conduct electricity just fine, they will have different AC impedance.
I would guess this wouldn’t make much of a difference if you go Audio->Ethernet->Audio, since sound is at fairly low frequencies. But Ethernet->Audio->Ethernet might have problems with really high data rates, like GiB/s.
what it do
could be used to use lan cables as aux extentions
