คุณลักษณะ

• It is for observing the blinking phenomenon of light emitting diodes and discovering the principle of electric power generation by electromagnetic induction.
• You can clearly see that the red and blue light emitting diodes flash alternately when the bar magnet in your hand passes through the coil.
• If you unscrew the tube and change the direction of the bar magnet (N-S), the order of the diodes will be reversed, and you will see that they emit light when entering and exiting the coil.