Here is a fast, cheap and generally safe project for beginners sparks with a minimum component count. It uses an ignition coil from a car.
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Beginners Sparks
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Tag Archives: aluminium
Lifters Construction
Lifters are devices that levitate using ion wind created from a DC high voltage external source. Here we examine lifters construction.
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Mystery Photos 116
This crack that separates the can in two was formed in 30 microseconds. How was it done?
ps Ninjas were not involved.
Mystery photos 116 in the series.
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Levitation by induction
Levitation by induction
To demonstrate levitation by induction, I have cut down a large transformer to allow an external field. It was 240 V to 110 V and rated at 2 kVA. I use the two windings in series. When run from DC it draws 15 A at 30 V or 450 W. This is enough to levitate a large NIB magnet about 17 cm away. This simple arrangement is not able to give stable levitation however but demonstrates the field strength.
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Magnetic viewing film
Magnetic viewing film
Magnetic viewing film allows one to visualise magnetic fields easily. Of interest is the segmented field from the top magnet which is not apparent by just looking at it. The old AlNiCo bar magnet on the left has a very distorted field.
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Levitation of a coil
Eddy current repulsion can provide enough force to give levitation of a coil. The coil was out of a defibrillator output circuit. Don’t know number of turns but the inductance is 10 mH (I think). It is drawing 6.5 A at 100 V AC to get the lift of about 1/2 inch off a 1/4 inch copper plate. It is tethered like a conventional lifter. The power is over 600 W so gets hot quickly.
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Nitrogen Laser 4
Another iteration of a Nitrogen laser and my best performer.”Continue reading” for more details of this laser. Continue reading
Toe Ring
This was a bit of silliness as a one off for a “sock hop’ dance to give my toe tapping some visual impact.
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Can Crusher 1
My earliest can crusher. Can crushing is a sudden constriction of a can using very high induced current.
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Can Crusher 3
Can Crusher 3 is now boosted to 3 kJ and mounted into a microwave oven case.
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