DIY: USB-Solar Rechargeable Light & Mobile Charger

Introduction: DIY: USB-Solar Rechargeable Light & Mobile Charger

Note: A link of PDF Map and pictures of this project would be
available soon here for free download and use.

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January 15th-2011

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    10 years ago on Introduction

    do you have the detailed procedure on how to connect the wires ?? i don't know how to connect it ..


    10 years ago on Introduction

    Where I get Solar Panels? Solar Panels are not available in Pakistan :(


    10 years ago on Introduction

    I dunno about that "3 volt regulator" business...
    if it actually puts out between 3.5 and 4 volt when hooked to usb or solar, then great. but a li-po like your cell phone batteries are basically considered "dead" at 3 volt.

    Minor note : With three of those cell batteries in parallel (presuming parallel, since series wiring would require over around 12 volt to charge) USB should be safe enough (5volt@450mA max), as would those dreadfully underpowered solar cells(combined 3V unknown current rating, but probably under 200mA). Even USB3 shouldn't be an issue, with 900mA still being close enough to a 1C charge rate, even for smaller cell phone batteries.

    However, avoid using AC-USB charging adapters for charging, as some of their current delivery can exceed a safe 1C charge rate, even in parallel battery configuration.


    Reply 10 years ago on Introduction

    thanks for the notes,

    the solars are able to charge those cellphone batteries, using that voltage regulator,
    the batteries are 3.7volts each, but they can be charged even with 2 AA size regular batteries using the 3v voltage regulator as i showed on the video.

    the project works great enough, charging with usb is faster than solar.