diode

You either need a real data diode or must physically modify Ethernet/Fiber cables and/or cards to do one-way transmission.

You could make a USB charger for a tiny lithium ion battery out of a cable, a diode, and a resistor.

The reason he used our data diode recommendation was you can use arbitrary hardware for the send, receive, and network nodes.

To simplify, imagine a diode on one side and a photodetector cell on the other.

Connect a small wire to the right kind of rock (or rusty old razor blade) just right and you get a diode.

I managed to make an acceptable diode that lasted about 2 minutes at a mere 200uA of current.

Poke two pins connected to your circuit until you find a bit that works like a diode (can take a few minutes).

The diode observes the extremely high optical frequency as DC signal, onto which you are modulating another signal at a lower frequency.

Tie each switch through a diode, toggle one column to high, read the rows.

Another electronics mnemonic I came up with, which is the Cathode and which is the Anode of a diode.

Even a dirty razor blade and a pencil will work as a diode!

There's a current limiting resistor and a back-emf protection diode across the relay coil, that's nothing fancy but it ought to be enough.

This doesn't use time of flight, it's simple "lighthouse was at this angle when diode triggered".

I was at a security trade show earlier this year and some companies were marketing "FTP diode": one way FTP transfert.

But I also used to pronounce LED (light-emitting diode) as "lead" until I heard an optical engineer (with PhD) say "l-e-d" and felt stupid.

Seeing "Researchers first to create a single-molecule diode", "Engineer develops real-time listeria biosensor prototype", "Physicists develop efficient method of signal transmission from nanocomponents" et al.