![]() ![]() The modifications aren’t easily reversible, and they may interfere with the toy’s original ball-levitating functionality. If you make a mistake you could damage the unit beyond repair. (My thanks to Viadd for pointing out this risk in the comments.) Also, performing the modifications outlined below means that you’ll void your warranty. The risks are small, but to be on the safe side you should only plug the Arduino + Mind Flex combo into a laptop running on batteries alone. Use extreme caution when working with any kind of voltage around your brain, particularly when wall power is involved. Of course, the Mind Flex is supposed to be a black-box toy, not an officially supported development platform - so in order to access the actual sensor data for use in other contexts, we’ll need to make some hardware modifications and write some software to help things along. The hack and accompanying software presented below works fine for the Force Trainer as well, but you’ll end up with less data since the EEG power values are disabled in the Force Trainer’s firmware from the factory. It gives you almost all of the data the Mind Set for less than half the cost. Given all of this, I think the Mind Flex represents a sweet spot on the price / performance curve. However, since we’d probably end up running an FFT on the wave anyway (and that’s essentially what the EEG power bands represent), we didn’t particularly miss this data in our work with the Mind Flex. The MindSet, unlike the toys, also gives you access to raw wave data. The Force Trainer, for example, doesn’t output EEG power band values - the Mind Flex does. The silicon may be the same between the three, but our tests show that each runs slightly different firmware which accounts for some variations in data output. Since NeuroSky supplies the EEG chip and hardware for the Force Trainer and Mind Flex toys, these options represent a cheaper (if less convenient) way to get the same data. The NeuroSky MindSet is a reasonable deal as well - it’s wireless, supported, and plays nicely with the company’s free developer tools.įor our purposes, though, it was still a bit spendy. It’s a great project, but the trouble is that the hardware costs add up quickly, and there isn’t a plug-and-play implementation comparable to the EEG toys. Open EEG offers a wealth of hardware schematics, notes, and free software for building your own EEG system. Plans and software for building an EEG from scratch After looking at the options, we decided that hacking a toy EEG would be the cheapest / fastest way to get the data we wanted.Ī non-exhaustive list of the consumer-level options for building a brain-computer interface: How to Hack Toy EEGs | Frontier Nerds Frontier Nerds: An ITP BlogĪrturo Vidich, Sofy Yuditskaya, and I needed a way to read brains for our Mental Block project last fall. ![]()
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