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Took me 3 months to figure out EEG signal drift on my homemade headset
I built a DIY EEG from an OpenBCI board and kept getting weird baseline shifts after 10 minutes of recording. I thought it was a grounding issue or bad solder joints. Finally traced it to temperature changes in my room when the AC kicked on. The cheap electrode gel I was using changed conductivity with temp. Switched to a medical grade gel and the drift dropped by 90%. Has anyone else dealt with environmental factors messing with their BCI readings?
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henrygrant3d ago
Hold on, isn't the electrode gel a consumable issue, not really an environmental one? Temperature changes in the room would affect any gel, right? I'd say that's more about finding a gel that's stable, not really a gotcha for environmental interference. I think your real point about temp stable gel is solid though, just feels like you're blaming the AC when the gel was the weak link.
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