ABSTRACT
With the existing push
in the direction of sustainable, clean sources of power, it is no surprise that
solar power has become one of the most popular alternative energy sources. Free
and available everywhere, the power of the sun can be employed to power
everything like cell phones and MP3 player. The sun's energy is usually
harvested through solar panels that are made up of photovoltaic cells. These
cells can convert the sun's power into electricity that can be used for a
number of purposes. For private use, a handheld solar hybrid charger can be
employed to recharge little device for instance a MP3 player, a cell phone, or
a camera.
A normal PN junction
diode is used for unidirectional flow of charge current. The output of the
solar panel depends on the intensity of the solar light. Use of embedded
technology makes this system efficient and reliable. Micro controller (ATMega8
/ 168 / 328) allows dynamic and faster control. Liquid crystal
display (LCD) makes the system user-friendly. ARDUINO is the heart of the
circuit as it controls all the functions.
In this project the usage of solar energy by using solar
panels are used .A voltage sampler is interfaced with the system to get the
voltage generated on a 16X2 LCD.
An alternative charger
circuit is also provided to charge the mobile by house hold general purpose
230V in the absence of the sun light. This charge circuit uses regulated 5V,
750mA power supply. 7805 three terminal voltage regulator is used for voltage
regulation. Bridge type full wave rectifier is used to rectify the ac output of
secondary of 230/18V step down transformer.
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