Vol.21

Otona no Kagaku (Science for Adults) Magazine vol.21

Modified A4/76 pages/On sale September 30, 2008
● Supplement: Electromagnetic Engine

※NOTE: All magazine contents are in Japanese. English versions are not available.
Supplement Magazine Supplementary explanations / Download
Motor building with a nostalgic feel
Since Faraday's discovery of electromagnetic induction in 1831, man has created many different types of motor to produce motive power from electrical energy. This edition's supplement kit is retro-styled motor reminiscent of the era in which this type of device was first developed.
* Prior to the 1860s, motors were commonly referred to as engines. Given that our supplement kit reflects a design from those early days, we remain faithful to that convention.
Electromagnetic Engine
Application of the principle from 'Sixth-Grade Science' (1978) Gakken's original reed-switch motor
This supplement's motor uses a special reed switch in place of a commutator and brushes. This particular approach was developed specifically for Gakken's educational materials.
Counter electromotive force is used to light up a LED.
Supplement Features: The reed switch can be moved up and down to control the direction and speed of the rotor.
 
Supplement Magazine Supplementary explanations / Download
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