When I first read this:

Using EEG, the researchers translated the greetings “hola” and “ciao” into binary, and then emailed the results from India to France. At this receiving location, a CBI transmitted the message to the receivers’ brains through noninvasive brain stimulation. This was experienced as phosphenes — flashes of light in their peripheral vision.
The First Successful Demonstration Of Brain-To-Brain Communication In Humans

I thought, wait a minute, magnets aimed at my brain can produce a feeling of lights in my peripheral vision?

Apparently there is an open source project so you can DIY. And if you want an EEG for the transmission end, there’s that too.