wjcroft
wjcroft
William J. Croft, Lightfield Systems, Mount Shasta, CA, USA. My website on neurofeedback, biofeedback: http://lightfield.com/nf.htm
LinkedIn profile: http://www.linkedin.com/in/wjcroft/
About
- Username
- wjcroft
- Location
- Mount Shasta, CA
- Joined
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- Member, Administrator, Moderator
- Website
- https://lightfield.com/nf.htm
- @wjcroft
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- wjcroft
Comments
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Hi KingBob, Have you tried running your session on a different computer? In the past, if the computer has graphics drivers issues, such as old drivers, then the GUI cannot start properly. To search for new drivers, go to your manufacturer's websi…
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Hi Jean, Have you already emailed to customer support? That way a ticket will be assigned and multiple engineering staff will look at your issue. Send to (contact at openbci.com). Include a link in your email to this Forum thread. I know that …
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No problem. In the IEEE paper, I believe they mention LSL timestamps. These are less accurate and more finicky than the simple Cyton External Trigger mechanism I mentioned. As long as your subjects are in the same room, the Cyton External Trigger…
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https://www.google.com/search?q=EEG+hyperscanning+(brain+synchronization)+using+openbci
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This research paper seems highly relevant to your case: https://ieeexplore.ieee.org/document/11134703 Real-Time Mobile EEG Hyperscanning: A Precise and Accessible Platform for Social Brain–Computer Interfaces Abstract: This paper pres…
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@Drashti said: ... Hi Drashti, I'll leave some quick suggestions here, but please also email (sales at openbci.com) to get connected to customer service. 1. Hyperscanning support Does the All-in-One Biosensing Kit support EEG hyp…
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Also another obvious cause I forgot to mention, is muscle tension in the jaw, head muscles, etc. Might explain why it localized to just a few sites. When tense, these generate 'EMG' like waveforms. https://nhimassageblog.com/2015/10/15/the-masset…
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Hi Zenton, I would check your environment for local EMF noise sources, that are sometimes intermittent. There are EMF meters available on Amazon and other sites, some below $50. You can also find EMF meter apps on Android and iPhone stores, if yo…
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Juan, hi. If you have not already, please reach out to Customer Service via email (contact at openbci.com) to open a ticket. How 'hard' is your tap water there in Chile? In other words (if this is well water) are there dissolved minerals in th…
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Unfortunately the JST-PH plug wiring (which pins are positive vs negative), is NOT standardized across the entire industry. Your Amazon seller probably uses the reversed polarity than Adafruit. Adafruit polarity matches what OpenBCI uses. You can al…
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Hi Udit, Your screenshots now look much better than the original ones you posted that had huge noise spikes. As you say the noise floor is a bit higher when you are near the simulator. But that is probably to be expected, given the proximity to t…
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OK, right. The GUI Time Series widget is showing the flat lines for 9-16, so the signals are not reaching the Daisy board. But... for ALL the signals to be affected at once, this seems to point to some mechanical (possibly intermittent) failure i…
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Hmm, so another possible failure point is with the LSL LabStreamingLayer setup or the GUI's implementation of the out-streaming of LSL packets. Do you absolutely need the LSL? Can you try a Windows test without LSL? https://docs.openbci.com/Softw…
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To clarify, your recording is not using the sdcard, correct? It is only the text file CSV recording produced by the GUI. The size difference may be explained if the sample values are all 0.0 instead of the longer values that have many more digits. …
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Hendrik, hi. I'm reaching out to Michael Knierim, the cEEGrid developer, to see if he might have any comments. Hopefully he will post on a followup comment here. When you say "the second half of the channels (channels 9–16) stop streaming and …
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Hi Cat, First, I hope you have emailed sales at openbci.com and have some individual counseling on your requirements. If you are utilizing Kernel fNIRS, that is certainly a very high end project. For staff reference, here are your impressive webs…
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I would try just one previous, 5.2.2 https://github.com/OpenBCI/OpenBCI_GUI/releases
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Hi Wave, Did you get any response from Customer Support? Have you tried earlier versions of the GUI? Tried on other laptops? If you are using the dongle, have you tried using OS native BLE support, selected in the GUI initial dialog? Mentionin…
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Hi Brogo, The other place I would recommend posting, is on the NeuroTechX Slack, which is free. Signup from their website: https://neurotechx.com/ https://docs.google.com/forms/d/e/1FAIpQLSfZyzhVdOLU8_oQ4NylHL8EFoKLIVmryGXA4u7HDsZpkTryvg/view…
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@uditkumar007 said: Thanks for the reply. I understand the point. We are testing the setup in a different location to verify this. Great. By Good Signal vs Noise metrics- I meant, is there any objective measure (like impedance) to …
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Your screenshots show CLEAR evidence of massive environmental noise in your room / building / area. The only solution is to address this noise. The phone apps are not as good as the stand-alone EMF meters. The idea with any EMF meter is to locate th…
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The GUI / Cyton 'impedance widget' WILL NOT work with Thinkpulse, because that widget depends on the ADS1299 chip acting as current source on the passive (non active) electrode having direct skin contact.
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As you can see from the FFT in your first snapshot, ALL the channels have the same noise spectrum pattern. This is almost certainly a sign of environmental noise from electrical devices in your immediate area. Have you tried moving to an 'quieter…
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How much noise are you talking about? A few microvolts of noise is the norm with any EEG, active or passive. Have you tried tests with just the passive electrodes as a point of comparison? Please email customer support soon for responses from …
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Hi, I suggest you email (contact at openbci.com), which is customer support. The Thinkpulse developer, Julien, previously answered Thinkpulse questions in that 'Q&A' Forum thread. Your best bet currently is customer support. To clarify on the…
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Hi Udit, re: impedance. See this comment at link below by Julien, the Thinkpulse developer. https://openbci.com/forum/index.php?p=/discussion/comment/20737/#Comment_20737 re: Cyton settings. See the docs section: https://docs.openbci.co…
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Have you read the 'Troubleshooting' section? https://docs.openbci.com/ThirdParty/ThinkPulse/ThinkPulse/#troubleshooting-the-thinkpulse-sensors-with-openbci-cyton-board * For every channel, set the GAIN to '8' or less.
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Also one oddity is that the OS is reporting as 'macOS Catalina', but the number shows '26.0'. Catalina is actually very old at this point and its number is 10.15.x. Latest macOS is called Tahoe and is 26.2. Have you tried this Ganglion board on a…
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Have you emailed to (contact at openbci.com), which is Customer Support? Since this is a new board, that is the first thing to try.
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Hi Winter, What electrodes / cap are you using? Is this an OpenBCI cap, cup electrodes or some other? @winterrrr said: During impedance testing, the impedance values of certain leads remain around 3 or 4kΩ. I looked at your scree…