Is anyone around here working on DIY EEG stuff? I’m trying to figure out the least expensive free/open gear that will (at a minimum) allow me to measure the frequency in Hertz of Gamma waves in my brain. Something <= $100 would be ideal. I’d be willing to do proprietary hardware in a pinch but would prefer open hardware. I absolutely need free software so I can hack on it. While not required for my purposes, it would be awesome if the setup could also display the freq in Hz of all six major EEG bands and provide realtime visual graphing of the waveforms.
Anyone doing something like that currently or have suggestions?
I would suggest you stop by the Purple Classroom tonight at 8:30 for the NEIWG meeting… they’re pretty much doing all of that
You might try Instructables.com and do a search there. I’ve seen some gadgets like your talking about. Here’s a couple:
open-brain-wave-interface-hardware
Brain wave monitor
Thanks for the info, I stopped by the NEIWG meeting and chatted a bit. Got a little info but nobody’s doing exactly what I want to do so I’ll do a little research and see what I can come up with. Most of the hardware I can find reports the amplitude of gamma waves within a frequency range rather than the specific frequency in Hertz of the majority of gamma activity. Might be something I can do in software if I can get the right raw data to play with.
Over the holidays, I picked up a Necomimi neurowear cat ears toy. This thing was super cheap but has the same EEG sensor and EEG DSP chip as the more expensive NeuroSky MindWave EEG headsets. (the idea behind the toy is that it displays your mental state by moving motorized cat ears). I need to hack it to disable the ear motors and break out the raw EEG signal to an external computer, probably a Raspberry Pi or something similar. If there’s any interest, I could drop by the next NEIWG meeting for show-and-tell (when is the next meeting?). It has a 512Hz sample rate and 3-100Hz range, it can read delta, theta, low/high alpha, low/high beta, and gamma as well as eye blink rate. Communicates via a simple serial UART.
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Awesome! Do you have a link? NEIWG meets every Wednesday at 8:30 pm and the location occasionally jumps around but for the most part it’s in the Purple Classroom.
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Sure, here’s a link to the one I bought on Amazon. I paid $39. The product is discontinued and it looks like Amazon is out of stock now but they list some other sellers and there are probably still plenty floating around eBay. I’ve got a photo shoot this Wednesday evening but I’ll try to make it out the follow Wed, Jan 25.
https://www.amazon.com/gp/product/B007YNBOJM/
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