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    How do I install a USB hub on a 5watt/9V solar panel?

    Hello Friends I am totally a beginner and I need your help!!! :p I can buy USB hubs which can be used with 18V solar panels here. But how do I install a USB hub on a 5watt/9V solar panel? My intention is to charge mobile phones directly from solar panel without using any battery bank. Does...
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    Cheapest LED light

    Hi friends, I am still new to electronics and have been trying to build a cheapest solar powered LED light using recycled plastic bottles using the following components; 1. 2 LEDs, Vf 3.0~3.2 2. Battery 4V, 4Ah 3. Resistor 3 ohm (Please suggest if it is suitable) 4. Blocking diode (dunno...
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    How to protect the battery from being over-used and overcharged!!!???

    Hi friends, I am a new member here and an environmentalist from Burma and a new starter in electronics. I am designing a solar powered LED circuit with a 4V, battery. How do I build a circuit that protects the battery from being overcharged and overused??? Please, help me with this. Any...
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