JLG
JLG
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Thank you for your quick reply. I had no clue about the galvanic battery effect. Thank you for the reference. This is not so much the picked up noise that is my issue but the channel-to-channel discrepancy. Noise does not discriminate, it should b…
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Additionnally, I have considered that human differ widely in terms of alpha waves generation but I have no problem seeing alpha waves when I use every channel from 2 to 8, the only one who causes troubles is the channel 1. I locate the electrode on …
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I wanted to limit the amount of pictures in one message but for the second test what I wanted to see was to further investigate some potential issues regarding electrodes and the way the board handles my electrodes. What I did is the following: I …
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Hi Philip and William, Thank you very much for the quick reply. I was using the OpenBCI GUI 5.1.0 on Windows 10. I would like to clarify my observations: I had three resistors 1MOhms, 680kOhms, 470kOhms. When looking at Chip's blog (https://…
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@wjcroft said: Regarding the raw data, this is unfiltered. The ADS1299 needs to have the DC offset removed, typically with a bandpass (.5 Hz to 45 Hz) or a highpass at .5 Hz. Without filtering this you will see this DC offset, frequently in the m…
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Hi both, I actually have the same issue. When I connect fixed resistors (by opposition to a potentiometer) with values around 1MOhms then I get correct results in the GUI (around 980 kOhms) but if I decrease the value of my resistors, the value set…
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Hi again, I contacted the support last friday and I am waiting for their answer but in the meantime, I wanted to know if you had any idea why this uploading issue happened. I tried with a new computer, it worked 3 times then same issue with the cor…
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Ok thank you, will try it on another setup. Kind regards
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No I checked this part, the port COM 4 was still there unchanged. The baud rate was 9600 which is the correct baud rate for the upload of the firmware, right?
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I thought about the same as the full error message was: \.\ COM 4 Cannot Open No target found So I thought about the port already being used or renamed so I rebooted the computer and nothing changed. I don't know yet how to OS scan my COM port bu…
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Dear WjCroft, thank you very much for your input. This solved the issue. I proceeded as discussed and found in the firmware the debugging mode that you described. I then used the example BoardNoAccelSDWifiDebug to play a bit around and the proceeded…
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Hi again, I now think that I have less vague questions: * Usually PIC32 has reprogrammable digital pins that can be used for UART serial communication. From the PIC32 datasheets, it appears that a lot of the pins can be reconfigured to be used …
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Thank you for the reminder and you are 100% right. We are still in development phase of the project and are still determining what can be achieved using the OpenBCI hardware in our specific application and how/if we can manage to do it. Will defini…
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Thank you for the quick reply and the useful links. Do you know if it is also possible to use the UART protocol to stream directly the data to a Raspberry without having to use the dongle? I imagine it would be using the digital output pins that I …