Solar power circuit

 Solar energy is an inexhaustible source of energy. Solar radios do not use dry batteries as a power source, but use solar energy as an energy source.
The components that convert light energy into electrical energy are several thin solar cells. The schematic diagram of
    the solar power supply is shown in the figure. Before introducing the circuit principle, let's briefly talk about the characteristics of silicon photovoltaic cells (ie, solar cells)
. Silicon photovoltaic cell is a physical battery that can directly convert light energy
into electrical energy. It has
the characteristics of small size, light weight, easy to use and store, and small reaction to temperature changes.
And its service life is almost permanent, usually at least
ten or twenty years. Its size comes in a variety of specifications, and the commonly
used ones are 10mm×20mm, 20mmx20mm,
etc. Its blue-black side is called the light-receiving surface. Only when light shines on
the light-receiving surface, the silicon photovoltaic cell will generate voltage.
There are several silver grid lines on the light-receiving hoop , and the two
wires drawn from the grid lines are the electrodes (upper electrodes) of the light-receiving surface. The opposite side that receives light - the backlit side is silvery white.