A black oily magnetic liquid forms strange spikes when a magnet is applied. Ferrofluid is a bizarre fluid that is magnetic made of nano sized magnetite particles contained in micelles in a mineral oil base.
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A motor driven hexagonal mirror spreads a green laser beam in the horizontal direction onto my hand.
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Laser galvanometer scribbles from discarded pen recorder from dumpster diving at the Physics Dept. Yes, it looks two dimensional as I moved the camera in a circle during the exposure. “Continue reading” for more galvanometer information. Continue reading
I arranged two mirror galvanometers to give two dimensional control of a 10mW HeNe laser beam. “Continue reading” for further information and another 9 photos. Continue reading
I made this as I thought I may need something to make joins for use in a vacuum that may get red hot. Epoxy and plain or silver soldering would not do. It uses a 6 V 90 A transformer and is able to spot weld a variety of mostly thin metal sheets.
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This homopolar motor has 4 components and takes seconds to make. Running here at 5800 RPM. It ran for 2:35 minutes once the power is off because the bearing is only a point with much of the weight taken off by gravity.
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A microwave oven transformer can be used for a powerful low voltage supply.
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For a morning diversion from my other projects, I made a Marinov motor. This is a motor that is simply two ball races and an axle.
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This electrolytic capacitor bank 1.5 kJ has SCR (silicon controlled rectifier) switching to control peak currents of thousands of amps. Mostly to make big bangs but also to drive projectile devices such as a rail gun and coil gun.
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I have used my big capacitor bank to drive the coilgun 3kJ at higher levels.
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