That plastic headband thing looks right for the job...neat, simple, nothing like a Frankenstein contraption. Will read more about those methods Itsu !
Seems to me, that what we are seeing is the combination of several previously 'fringe' technologies, now shaping up to be a real medical breakthrough because MIT have allowed their name to be associated. Calls of scam and snake oil don't apply to that Uni ! Am also quite sure that what we could end up with, is a wearable device that features neural feedback. Wrist worn, like a watch, it would prevent losing the thing around the house. Probes could plug in via a 4 pole 3.5mm jack socket, same as seen on Raspberry Pi's. It could log data with real-time uploads to a cloud service such as Thingspeak. Trained medical personnel could then monitor the brainwaves, as part of the human trials effectiveness. An ESP8266 or ESP32 could take the readings and upload (ESP8266 are around $3 and offer WiFi, an 80MHz CPU and similar connectivity to Arduino's). In fact....am working on a wearable that could be converted for this use at the moment. I won't clog this thread up with such an aside, but will make a Bench post and shoot a demo vid. See what you guys think, if it could be a route. A future possible solution for home trials. It was going to be an Indiegogo campaign idea, but could suit this purpose.
A repeat of my YouTube comment re: Jim's video...just in case it's better here than there: That's a very cool build Jim ! For a timer, one way is to buy a DS1307 or similar battery backed clock module. They are only around $1 and give time functionality to the Arduino. You'd then set the time in software once, then leave it to run for however long the onboard CR2032 coin battery lasted...years perhaps. In such a way, you could set the times to start flashing and times to go off, but could turn the actual device on and off the same as you did here and not lose the time info.
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