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Re:Ask HN: What are the best brain-interface devices that a ... by thedevindevops on Monday May 20, 2019 @03:17AM (#19958168)
The open EEG project lists some open source EEG hardware and ahem 'Active Electrodes':

http://openeeg.sourceforge.net/doc/hw/

Re:Ask HN: What are the best brain-interface devices that a ... by tobylane on Friday May 17, 2019 @09:34AM (#19939426)
A keyboard. It's the best in terms of correctness. What meaning of best are you thinking of?
Re:Ask HN: What are the best brain-interface devices that a ... by AwesomeFaic on Sunday May 19, 2019 @05:27AM (#19952374)
I'm guessing they mean EEG monitors or similar hardware