make Your own EEG electrodes (and save a buck or two):
1/ Go to the shop and get lead-free solder. It is a mixture of tin and silver.
2/ Make a drop and let it fall on a flat surface.
3/ solder a wire to the new formed disc.
4/put in saltwater with white vinegar with a sacrificial cathode made from your mom's sterling silverware.
5/ The positive is the little disc you just made. (yep You need a battery)
6/ Let it run until it's black.
now you have a professional ag/agcl electrode.
7/ Use hot glue to fashion the disc holder.
8/ Check cost with prices of official manufacturers
9/ Sing , shout, enjoy and be very happy !
I must admit that then when I read the Hitachi news release I had some big train (even shinkansen or at least TGV) in mind when it said "move the train by the power of Your brain" but as the japanese tend to miniaturization I should have been prepared to what the video really shows.
But then again size does not matter and the principle is sound. NIRS: Near Infrared Spectroscopy (cfr former blog entries) is here to stay especially in BCI applications: (no hassle with gelled electrodes and artifact by popping electrodes or changing impedances).
Keep singing and and the train will be on the move and keep perfectly silent when it enters the station in order to make it stop. I said silent ... that means no calculations !! stop thinking please...stop... please....aaaaaaiaiiii
