Product Principle:

A solar cell is a device that directly converts solar energy into electrical energy through the photovoltaic effect. It is a semiconductor photodiode – when sunlight shines on the photodiode, it converts the solar energy into electrical energy, generating a current.

Gameplay Points:

First, steadily rotate the generator crank to illuminate the four LED lights. The light shining on the solar panel converts solar energy into electrical energy, causing the small fan to rotate. Second, slowly rotate the generator crank to dim the four LED lights. Less light shining on the solar panel generates less electrical energy, causing the small fan to stop rotating.