hiking
hiking
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@wjcroft said: Richard @retiutut, there are several new posts asking for the format of the CSV file. Can you respond? Thank you very much for your reply. I have understood all the meanings of the csv file header. The D17 pin is in Other4
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@wjcroft said: JC, hi. The last three columns in the SD card hex file, are the "Aux channels". By default these carry the Accelerometer x,y,z values. But they can instead be configured (using "board mode" SDK commands), to record the Dxx p…
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@wjcroft said: Frankly however, I think you would be BETTER OFF, reading out your external triggers in Analog mode than digital. Then your code can confirm that the trigger on/off voltage levels are what you expect. And can detect if something go…
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@Alejandro said: Hi guys! I've just shifted to the GUI v5 after been working a lot with the v4. I'm quite confused about the new file format, and I couldn't find any documentation on the headers. I normally use the board in different configur…
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@jake said: Thanks for everyone's help! Things make more sense now that I understand that: 1. The board can record only Accel, Digital, or Analog at a time, and 2. The names were wrong in the output files. I went and looked in the CSV …
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@hiking said: @wjcroft said: Before starting the session, you must place the Cyton 'Aux' channels into 'digital' or 'analog' read mode. Using the corresponding Widget in the GUI. If you do not do this, then the Aux channels will sho…
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@wjcroft said: Before starting the session, you must place the Cyton 'Aux' channels into 'digital' or 'analog' read mode. Using the corresponding Widget in the GUI. If you do not do this, then the Aux channels will show only the Accelerometer val…
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@Rafia said: @Yamada, Hi. Are the pins d17 and d18 recorded somewhere? Yes. You can see at the recorded txt file . There will be 4 digital columns. The last 2 are D17 and D18. Where can I see event numbers, wait times, types, urevent …
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@wjcroft said: Bandpass filters are not that sharp, and depend on the 'filter order' of the filter. Your images show strong mains effects. Sadly, I used a notch filter for both the .csv data and the .bdf data, the order of the bandpass fi…
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@wjcroft said: "I'm not using a notch filter because my bandpass filter is 0.3-45." But is not your mains at 50 Hz?? You STILL need the notch. That is, do a notch filter even though my bandpass filter range doesn't include 50hz? I'…
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@wjcroft said: Your second image shows TONS of mains noise. Did you apply the notch filter, as the GUI does? The CSV file has NO filters. So you need to apply BOTH a bandpass and a notch. Typically .5 to 45 Hz and whatever your local mains freque…
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@wjcroft said: The CSV text file and BDF file are ALREADY in microvolts. No need for any further conversion. DSP signal processing filters differ slightly in their implementations. So the filtering applied by the GUI display screens (done …
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Hello, so now according to the information I found, the .bdf and .txt files are the raw data collected, if I want to convert it into the GUI shown above, what I need to do is to filter the data appropriately, but the filter After that I found out th…
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re: differences between raw CSV data and BDF format data ? Hello, I am currently encountering a problem similar to the example, https://openbci.com/forum/index.php?p=/discussion/201/large-millivolt-data-values-fbeeg-full-band-eeg but since …