Recent content by Shine

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

    Many thanks for all the answers, Steve! Wishing you all the best luck! :D Shine
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    How do I install a USB hub on a 5watt/9V solar panel?

    Hello Steve, THANK YOU for all your help thus far. I hope you won't mind if I ask you something off the topic. We import solar panels from Jiangsu, China. We sell quite a large quantity in our country. I asked my partner about building a mini-factory in my country. His EXCUSE is there...
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    How do I install a USB hub on a 5watt/9V solar panel?

    Okay, got it. Thanks!!!
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    How do I install a USB hub on a 5watt/9V solar panel?

    Here's an image I found. But It has a "charge input" to charge battery bank. I wonder if we can replace the "Charge input" with the "USB hub". Really hoping it works. What do you think, Steve?
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    How do I install a USB hub on a 5watt/9V solar panel?

    Okay, thanks again, Steve. Good luck! :):):)
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    How do I install a USB hub on a 5watt/9V solar panel?

    Many Thanks Thank you so much Steve, that was really very helpful. I will test it. :):):)
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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

    Thanks for useful links. This was actually a question from a friend of mine. Obviously, I am not going to build the charger myself. I found a charger in your link which can operate with solar panels up to 200 Volt open circuit, but it only charges batteries between 24V and 100V. Therefore, I...
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    Cheapest LED light

    Yes, Ni-Mh AA rechargeable batteries. Do you mean lead-acid batteries are better than AA Ni-Mh batteries? By the way, I've got one more questions. I've a solar LED bulb. It has a very small built-in battery. I attach the pic of the battery(I am not sure they are LiPo or not) but the bulb light...
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    Cheapest LED light

    Hi all I have a 150W solar panel which generates an output DC voltage of 200V and amperage of 18.5 ah. This panel is to charge my 12V, 90Ah battery. Please recommend me a suitable type of charging controller/battery charger I should use to match the battery and solar panel. Since the...
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    Cheapest LED light

    You gave me many things to consider. I'd better follow Donkey's advice that I can replicate the circuit from solar garden lights and other solar lighting products. I forgot to mention that I have about 200 pics of AA rechargeable which I purchased from China. They are no longer in good...
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    Cheapest LED light

    Attachments Here comes the pictures!
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    Cheapest LED light

    Thanks you, Harald and Donkey for your excellent comments and advices. Due to my lack of knowledge in electronics, I hesitate a little about what to do next. LEDs Should I connect the LEDs in series? So, please suggest how I can connect the resistors. I can't find the operating current for...
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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!!!???

    Many, many thanks for the answer!!! I already knew the project would not be easy for a starter but millions of poor households in our country still uses oil lamps and candles. What I would like to make is the low cost solar powered LED light(light output is fine) to introduce the rural poor. I...
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