faheemersh
faheemersh
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@wjcroft How can we determine what frequency (31.2 or 7.8 Hz) is used during the test? Also, is there any circuit diagram showing how the ADS1299 on the cyton performs the skin to electrode impedance measurement? I checked the manual and the page yo…
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@wjcroft Really appreciate the suggestions!
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@wjcroft Back then, I used the optoisolator setup from the external triggering page on the OpenBCI website. Using the setup shouldn't cause any issue if Vdd is connected, right? If connecting to Vdd is an issue, then this page may not be a good ref…
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As I mentioned, you can find this information on my github: https://github.com/faheemersh/Senior_Design_Dry_EEG_BCI/tree/Validation
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@wjcroft, Hi! I actually closed off that document since it was unorganized and incomplete. I tried to track down wherever I posted that link and instead placed a link to my github, which has all of that information and more: https://github.com/fahee…
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Hi @ElisabethSmithie! I don't believe you'll have to change that and from what it looks like, you're able to successfully get LSL streaming to work with python. If you're trying to receive the data in python (I haven't tried this myself) I think y…
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Hi everyone! I've been getting some requests to open up the google doc that I posted the link to on this thread, but I've closed that off as I've made something far more extensive and detailed. Please see my Github repository: https://github.com/fah…
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Hi @cerealkiller! I've tried doing this multiple times and checking the text files/comparing with MATLAB when I was working on my senior design project. It does seem that filtering occurs when sending through LSL. It would be great if other users c…
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@zhanglei What software are you using for the paradigm? And how does your paradigm work exactly? It seems like its just a variant of a P300 speller.
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Or see this image if the previous one does not show up.
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@zhanglei I'm not exactly sure of your question, but I'll try to answer. If you're asking how to see the marker in the data, I wrote something like this in my shared document: If you open the text file produced from the OpenBCI GUI recording, ther…
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@zhanglei: No problem! I'm happy to help! @pushtheworld: That'd be awesome! Can I write something up with my group and maybe it can be in the next newsletter? We'll officially be done with the project in early May, but will be demoing on April 27.
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I'm sorry, I completely misread the inequality when I said that. I looked a the second link, recalled that I knew the relationship, and then impulsively responded without checking the first link. I remember the relationship between nyquist frequency…
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Okay, right, thank you. I wasn't thinking when I posted. So our frequency range would be 0-500 Hz approximately, since we can't go higher than 250 Hz sampling rate.
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So I was a complete noob almost 2 months ago. Here's a guide to how I got external triggering to work: https://docs.google.com/document/d/1rdp4mJKKu5mBQRHH0cVUDW4-uLGTncGEp0tp2nXT6yE/edit#heading=h.a8ayp95sr5wc Feel free to make comments!
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Hi everyone! A while back, I said I was going to try to use external triggering with a P300 paradigm and cyton 8 channel, 32-bit board. My senior design group was able to do this, but we ended up using a VEP paradigm instead. Nonetheless, I have bee…
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At the moment, we've decided not to pursue adding fNIRS for the sake of time. Our deadline for the project is in about 2 months.
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Hi everyone - I'm actually trying to do this and I'm wondering...there are on and off buttons in the networking widget. Do these not work (in terms of sending filtered data) over LSL in the current version of the OpenBCI GUI (v3.2.0)? I'm trying to …
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Sure, here's the breadboard image: And here's the picture of the diagram: The only thing I'm worried about is that on that page (http://docs.openbci.com/Tutorials/06-External_Trigger_Cyton_Example) there are more instructions, but I'm guessing t…
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I apologize, I misread the diagram. For step 2, I should've said that I'll take another wire from pin 5 (along with the resistor of course) and plug that into VDD, not a wire from pin 6. We're doing this to try and observe the delay of the trigger…
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Hi @KCDTyler and @pushtheworld! I'm trying to setup an external trigger for a P300 and have also been confused about how to do this. I think I understand what to do now based on both of your posts. Please let me know if I've understood correctly. T…
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I have been able to get around all of the issues apart from the streaming directly from the serial port with some help from the LSL repo contributors/collaborators. Unfortunately, Frederic never replied. It also seems that I have exhausted wjcroft w…
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After a few days of trying, I was able to get LSL working through python and then stream data into MATLAB using the lsl examples (the link you sent me that I wasn't sure how to use), using MATLAB viewer, and BCILAB. I created a document of the exact…
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Also, I forgot to add on. Atom2626's script seems to work correctly only if the I have the Hub running and run the script once in Matlab. Still having the issue with having to close and open Matlab to run the script. No response from Frederic either…
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I've gotten the networking widget on my GUI. However, I'm not sure what the parameters should be in terms of IP, port, and address. Do you know what these should be or can you refer me to the right place? I think this is the reason why I'm having th…
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Also, it took 40 seconds to get 2000 samples from each channel, or 16000 samples overall. I've uploaded the time it took to run the script to the repository as well: https://github.com/faheemersh/Senior_Design_EEG_fNIRS_BCI/tree/Streaming-to-Matlab-…
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I think his running his script one time seems to occupy the port. I can't run it again, even with both the OpenBCI GUI and Hub closed. I have to restart Matlab to run the script everytime. Is there a way to somehow not occupy the port after running …
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I've found his email via Github. I hope he responds! I've been trying to combine the code from his script, replacing the parts that he updated later on in his posts. I've gotten various errors for undefined variables, which I assume I'm getting beca…
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Thanks for referring me to atom2626's post. I contacted him via a direct message. His links aren't working however. I want to try creating the script and functions in Matlab based on his code, but do I still have to setup the LSL in python first? …
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I found the OpenBCI Matlab repository on Github but I see that it's deprecated and it directs me to follow the OpenBCI LSL procedure using python. I'm still stuck on python hanging at!python openbci_lsl.py COM13 --stream After I get this to work…