peabody124
peabody124
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Yeah once I work on electrode placement, focusing on the feature selection is definitely the next big step. I'm in that unfortunate regime where the dimensionality of the data isn't much different than the number of trials. Probably I should also ru…
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I got some tests done finally and could decode which limb I moved somewhat. Nothing too sophisticated, so I'm fairly happy as a first step. http://buildandcrash.blogspot.com/2014/03/eeg-and-decoding.html
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Cross posting from my other thread, that is exactly what I did and it runs onboard the STM32 without issue.implementation is here:https://github.c…Thanks for the electrode links. Just ordered a few sets. Should make an improvement on the washers . Those dry electrodes look pretty sweet. Those pogo pins those are something we used in my lab and IIRC they are crazy expensive. You'll end up prob…Haha, maybe not the most comfortable but hopefully reproducible. Once the Spider Claw 3000 is out I'll be looking at that ;-). For now hopefully if this hat works I can pad the inside with foam and make it reasonable and quick for on off. I just did…Oh yeah, I have like 13 quads last time I counted, some with cameras (I'm particular proud of this video since it was using a gimbal I programmed too). My goal is to control them with BCI Heh. Hopefully my mu waves can be modulated as suddenly.…I set the color range from -80 to -20 dB. I had to play with the spectrogram settings to get it to look clean like that.
spectrogram(dat(1000:end),512,[],[],250);I was fairly impressed with how abrupt the changes are. I expected …And got some signals from eye open/closed:I was drinking wine while posting that Also tested some new multirotor navigation code ( - sorry off topic) so it was a productive day. Plotting the difference amongst the leads produced a much cleaner signal:Got my heartbeat I guess it is time to jury rig up a headband.Thanks. If anyone wants to see the code it is here https://github.com/peabody124/TauLabs/tree/eeg (it's currently structured as a branch from Tau Labs but I'll work on that eventually). The next step is to get the impedance monitoring working an…I got the boards back and got one soldered You can see my notes here http://buildandcrash.blogspot.com/2014/01/eeg-stuffing-and-testing.html And a video of it talking via my phone hereSTM32 has a serial bootloader too (I tend to use the USB one though). I can't say I have tried it over bluetooth though, but you can change the baudrate so it should be doable. If you want to be able to do a meaningful amount of processing on boa…@Chip: nice. i just know in my own hobby field (UAVs) the power from a faster 32-bit core enables a lot that is prohibited by slower 8-bit cores. At the very least having more power can let you make better architected code instead of having to try a…@Chip: yeah I went back and forth on the isolation. It is a bit annoying to give up the ability to connect to a computer (except for test harnesses) but ultimately since I want this something I can carry on the go connected to phone this is probably…I mostly figured it out from a few comments in the EVM documentation. The real datasheet is pretty vague on how to use the references and bias terminals appropriately. Thanks for the comment, now it makes total sense what you did with negatives and …Thanks. I just posted an entry about the beginnings of an android app. I'm kind of out of interesting things to do on it though until I have a board now ... or at least things that will keep me motivated. You can also do dual sided boards in a ho…