The mailing list seems to answer easy questions pretty well, but some of the more involved questions seem to go without answers a lot.
This is likely because the ones who really have the background to answer them seem to answer questions only infrequently. Understandable given the length of time the project has been running and the very limited bandwidth of the real experts.
I’d like to propose this page as a place where people with questions that have gone a while without an answer can place them, so that when the experts do get time to answer questions they don’t have to wade through all the chaff on the mailing list.
I would propose it work as follows:
The poster of the question who feels it has not been answered adds their question to this page.
Anyone who feels the list of hard questions hasn’t been looked at for a while may remind the mailing list and send a link.
When an answer to a question is made, send it to the list. Either the original poster, the answerer, or anyone who feels so inspired may move the question to a sister page of “answered hard questions” that can be created when the first one is done. (removing it from this page, and summarizing any intermediary discussion, of course)
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Questions:
1)
It was posted quite a while back on the mailing list the procedure to chloride some raw silver to create a silver/silver chloride electrode surface for better signals.
If someone could find this in the mailing list and post it here. Thanks.
2)
What do people think about putting ferrite filters around our electrode cables to suppress H.F. noise, like they do for DC power supplies? I think some of the professional companies are already doing this.
3)
Would it be beneficial to connect the electrode cable shielding to the DRL, instead of to VGRD? and would this improve DRL stability? it would be similar to the cable guarding concept except instead of driving the cables with with the eeg signals, you would be driving them with your body ground offset.
4)
Joe Street’s active electrodes use batteries, I very much like this idea but am wondering how many hours he gets out of the batteries before he has to change them? Also as the batteries get lower will the signals just start to get progressively distorted or will they just cut out? How will I know when to change them?