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This is piece of lab equipment that allows for even mixing of low viscosity fluids for chemistry and other lab test. this unit has the same functionality as a $325 machine but only costs $30.Education
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look on Wikipedia and You Tube for more uses of this device.
Materials and methods
-12v Dc electric motor like this. http://www.amazon.com/gp/product/B00NN6EXV0/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1
-single pole triple throw switch
-LM317 with heat sink
-47uF cap at 20V or greater
-12 to 20 volt power supply 16v at .5A is ideal.
-Soldering iron and soldier
-m5 x 10 bolt and nut
-MR105ZZ Ball Bearing
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