[Carbonhell]

Messing with EEG headsets, like the ones by OpenBCI. Being able to perform some operations by just thinking about them sounds so incredibly cool - I've been thinking about this for several years, but it looks like quite an expensive hobby.

[plastic-enjoyer]

As an ex-EEG researcher I can say that acquiring an EEG device is probably the least difficult thing. EEG signals are messy, not reliable and hard to interpret. Without a solid foundation in cognitive psychophysiology you won't have a lot of fun with an EEG device. So, before investing a lot of money into an EEG device you should watch a beginner course on cognitive psychophysiology or get some literature to get the basics down.

On the other hand, you could probably hack a cheap ECG device to measure EEG signals.