Make a “Dreamachine”

Make your own “Dreamachine” – a machine that’s meant to used with your eyes closed, not sure if it will actually do anything, but it’ll be fun to have your friends, er, test subjects tell you about their alpha waves – “The Dreamachine simply consist in a cylinder with holes cut into his sides, placed on a turntable set at the speed of 78RPM. A lightbulb is suspended on the center of the spinning cylinder, and the rotation allows the light to come out from the holes at a constant frequency, situated between 8 and 13 pulses per second.” – Link.