nekrodezynfekator
nekrodezynfekator
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- nekrodezynfekator
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- Poznan, Poland
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Comments
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1. Hygienic stick and hot water. Hygienic stick and alcohol will be also ok.3. I used Cython in my research: http://openbci.com/community/stimuli-design-for-ssvep-based-brain-computer-interface/ http://openbci.com/community/project-and-evaluation…
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Brain signals are very low ~mV. Because of that it is necessary to use amplifier, like ADS1299. Arduino doesn't have that aplifier so it is impossible to measure such low signals. But you can build your own board using ATmega (from Arduino) and A…
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Show us your Matlab code
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So, has anyone tried to use DIY dry, active electrodes with OpenBCI??
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New GUI works only with new firmware? 8bit boards are not suported by new GUI?
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Check also:http://openbci.com/forum/index.php?p=/discussion/754/stimuli-design-for-ssvep-based-brain-computer-interface#latest
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check: http://openbci.com/forum/index.php?p=/discussion/619/my-ssvep-bci-16-led-matrix
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Could u give me the steps how to do such nice spectrograms?
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Which pin on my OpenBCI I should use for re-reference?
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I have the same problem. ICALAB is too old for my matlab. I didn't implement any BSS algorithm.
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What's your EEG montage (electrode locations, reference, ground, re-reference)? electrode locations: O1, O2, P3, P4, Pz reference: Oz ground: right earlobe re-reference: ?? could u explain? What's the bandwidth of the filter for picking…
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I use sine wave to control LEDs becouse: I think that it's easier to obtain accurate sine wave using arduino than square wave, I was inspired by: http://www.pnas.org/content/112/44/E6058.abstract .They also use sine wave to generate visual flickers…
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I checked that sin wave generates better SNR. I compared 3 waveforms: sine, square and sawtooth. Differences between sine and square was unsignificant. In my graph, top graph represents energy of fundamental harmonics, bottom represents energy of f…
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GitHub contains early version of my app. I think that I will rewrite it and then share it for OpenBCI community. It will provide a way to collect and display data. What kind of behaviors or outputs are you controlling with your SSVEP? I'm controll…
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U should check how to compute frequency. f=1/T T-period f-frequency T=time ON + time OFF. So, i your case: T = 100 ms + 100 ms = 200 ms = 0,2s f = 1/0,2s = 5 Hz what u see is correct
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I spent a lot of time with SSVEP and OpenBCI. I tried many configuration and I think that the best location for SRB electrode is Oz. I also couldn't achive SSVEP with SRB electrode mounted at ear lobe.
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I'm using following code but I'm not sure that is 100% correct: fs=250; [y,f,t,p] = spectrogram(data,2^nextpow2(fs),fs,2^nextpow2(fs),fs); surf(t,f(1:60,:),10*log10(abs(p(1:60,:))),'EdgeColor','none'); axis xy; axis tight; colormap(jet); vie…
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Here's the image of my spectrogram (made from first and last column of data):
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Error 404 Unable to resolve the request "4ut6p;"
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Could u upload your data here in txt file?
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Hi. Will "Ultracortex Mark 3" be available in your shop in the near future? I would like to use it in my PhD work and time is running out for me. thx, Marcin
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I will be the first buyer
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But why?
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Is it something wrong with the 8-bit version? Why did you let go of that idea?
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It is possible to use electrodes from electrodes starter kit?
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Image is broken ;(
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I want to print my own Ultracortex. Which file should I print? https://github.com/OpenBCI/ultracortex/blob/master/Mark_2/Models/STLs/M2/UltraCortex_M2_back left2.stl and https://github.com/OpenBCI/ultracortex/blob/master/Mark_2/Models/STLs/M2/…
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I observed sth strange. Every 2 seconds signal amplitude was increasing in all channels (it isn't blink):https://drive.google.com/file/d/0BwCCA0mNmuFJeGxBOG5HTktabkU/view?usp=sharing channels 1-4 opptical area channel 5 forehead channel 6 wris…
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What do you think about use powerbank like this? It is safe for OpenBCI? https://cdn4.pcadvisor.co.uk/cmsdata/reviews/3532885/Olixar_enCharge_Power_Bank.jpg
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It is possible to use OpenBCI with that accu? http://www.amazon.co.uk/Duracell-Rechargeable-Accu-2400-Batteries/dp/B0031OE6LG That accu have lower voltage than standard battery.