If you ever need an EKG like right *now*.pic.twitter.com/tAwtLufcF4
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@marcan42 You need 2 at the very least. You can put them on a headband. The problem with these hacks is they're dangerous (no isolation).
@doragasu Well you always need 2 (hand is - for the EKG). TBH I think consumer safety stds should be enough to touch a mic in to your head!
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@marcan42 I know, but EEG requires differential measurements, so you need 2 electrodes per channel, plus the reference. -
@doragasu why? if you're just measuring the potential difference between two points, you shouldn't need a separate reference. - Show replies
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