Has anyone started a project to create an LED that blinks at 40Hz, based on the recent discovery that a 40Hz blinking LED can reduce beta amyloid plaques in the brain by 50%?
http://news.mit.edu/2016/visual-stimula ... eimer-1207
Ref: http://news.mit.edu/2016/visual-stimula ... eimer-1207Using LED lights flickering at a specific frequency, MIT researchers have shown that they can substantially reduce the beta amyloid plaques seen in Alzheimer’s disease, in the visual cortex of mice.
This treatment appears to work by inducing brain waves known as gamma oscillations, which the researchers discovered help the brain suppress beta amyloid production and invigorate cells responsible for destroying the plaques.
Further research will be needed to determine if a similar approach could help Alzheimer’s patients, .... “It’s a big ‘if,’ because so many things have been shown to work in mice, only to fail in humans,”
Generating 40Hz I would have thought should be easy enough using the Pi's PWM controller though I have never tried it. Then all you need is a transistor or FET of a suitable current rating to switch the current through the LEDs.
Don't even have to get that complicated. I used to build 1Hz oscillators out of 2 dual-input NAND gates, plus an RC timing circuit. Not necessarily terribly accurate, though, but I suspect there is a fair amount of tolerance in the OPs project. And if there isn't, he should probably start with a proper bench oscillator to get the exact frequency he wants.