programmatix
programmatix
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- programmatix
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- UK
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Thanks @wjcroft! That answers my first question - so the sub-0.1 'noise' is down to the DC offset. And I found in further experiments that I need to filter out below 0.5Hz, to remove the low delta noise caused by movements, which answers my second…
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Yes I don't think there's anyway of using the dongle directly from an iPhone. I have the dongle in a mini-pc, and then stream from there to an app on my phone using a websocket interface.
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I have an unrelated (I think) question about low-frequency noise, which I'll post separately.
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I forgot to update here: I found that the electric blanket only chucks out loads of EMF radiation when it's in a mid setting. At off or full on, it's fine (no frequency spikes). So I have it on full blast to warm up, and then off overnight. @wj…
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Hi @wjcroft. I filter at this low level in line with the AASM recommendations for sleep scoring, and also because YASA is going to do the same anyway. (And also now I've seen how bad the data is when the dongle is plugged directly into the lapto…
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... and as standard, manage to figure it out a few minutes after posting asking for help. (But I'll leave it up, in case it helps someone else) I realised what changed: it's got cold in the UK, and we've started using a heated electric blanket o…
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For anyone else in the UK looking for a battery solution for the Cyton: I've found these https://thepihut.com/products/3x-aa-battery-holder-with-on-off-switch-and-2-pin-jst with some rechargeable AAs to be... ok. The black wire breaks off internall…
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As another data point, I'm hitting various intermittent issues with SD cards also (https://openbci.com/forum/index.php?p=/discussion/3916/uneven-results-with-sd-card-files#latest), and have hit this same "^@" issue more than once (along with other p…
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In OBCI_0E.TXT I found the file terminates unexpectedly just a few minutes into what should be a 12 hour recording, on line 142995: %SamplingFreq: 000FA %Total time mS: <<0 byte here>>003C5C96 %min Write time uS: 00000146 %max Write t…
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Oh I should mention also, that while I only need second accuracy for the current PSG focus, I would like the option to do ERPey things eventually, and will need millisecond accuracy then.
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So my impression is that you have the dongle in the bedroom along with the computer. And if you leave the sleep environment the signal is unreliable. Isn't this ok, since you already know that you are in a non-sleep period? That's correct, t…
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Hi @wjcroft, thank you for the tips. The dropouts are unavoidable (at least when streaming to the dongle), as they happen when I physically leave the room where the dongle needs to be - this is part of a home PSG setup. When the Cyton is in the …
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Thank you @wjcroft, that's reassuring. I was already planning on discarding the charger as I suspect (from the smell and the smoke) that it is irretrievably fried. I don't feel confident on adjusting the battery leads so I will just use that for a…