Solar-powered mobile phone charger
Source: InternetPublisher:CdiK4D0Em Keywords: Solar power mobile phone charger Updated: 2025/12/23
The simple circuit below regulates the voltage of a 6V solar panel to a fixed +5V. This voltage can then be fed to any mobile phone or USB-connected portable device to charge its battery. The circuit uses a Texas Instruments Reg113-5 voltage regulator. This small device can handle charging currents up to 400mA. I recommend using a solar panel with a rated power of less than 2 watts and containing 12 solar cells. One such panel is shown below.
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