Thursday, February 28, 2013


Solar Based Mobile Charger for Rural Areas

With the alive push in the direction of sustainable, clean sources of power, it is no surprisal that solar power has become one of the most habitual alternative heftiness sources. Free and available everywhere, the power of the fair weather domiciliate be employed to power everything like cel phones and MP3 player. The cheerfulnesss energy is usually harvested through solar panels that are made up of photovoltaic cells. These cells can convert the suns power into electricity that can be used for a number of purposes. For private use, a handheld solar hybrid deplumater can be employed to recharge little device for instance a MP3 player, a cell phone, or a camera.

A typical PN junction diode is used for unidirectional flow of charge current. The takings of the solar panel depends on the intensity of the solar light. To regulate this voltage, LM317 is used. LM317 is an adjustable voltage regulator. The regulator circuit is intentional to get a fixed voltage of 5V.

An alternative courser circuit is also provided to charge the mobile by home plate hold general purpose 230V in the absence of the sun light. This charge circuit uses regulated 5V, 750mA power supply. 7805 three storehouse voltage regulator is used for voltage regulation. Bridge typeface full wave rectifier is used to rectify the ac output of secondary of 230/18V step down transformer.

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Block Diagram:


bombardment under Charge


Solar Panel

Unidirectional flow control device

military force supply to rechargeable battery

Unidirectional flow Control Device

barrage under charge


Solar Panel


Bridge Rectifier

Step down T/F

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