Needed: an aluminium can, a thin copper plate, two spacers of rubber, a motor of 2-3 volts "cd rom motor". 1 liter of water with 2-3 tablespoons of salt. The duration of the time of rotation of the motor is over 7 minutes. When the battery runs out
by José Lourenço via Facebook at March 23, 2015 at 09:17AM
http://ift.tt/1IjfFPR
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