Question:
What is wrong with my solar usb charger?
2009-05-24 19:28:24 UTC
Im trying to do a solar usb charger from garden lights (idea from video link below). I got solar panels hooked up to give me ~5v DC already tested with a multimeter. I cut a male usb and turned it into a female usb port to hook up my phone, media player, ect. Then I hooked up the negative and positive cables to the red and black cables from the usb But its not charging any device.

1. Which color cables from the usb cable should i hook up to my negative and my positive from my solar array and do i need the white and green cables for anything?

2. If I need anything can you give me a link to how it looks like? I have a lot of electronic stuff but im new with hardware tinkering so i might have it laying around but might not recognize it

http://www.metacafe.com/watch/800000/solar_powered_usb_charger_cheap_and_easy_to_make
Four answers:
classicsat
2009-05-25 13:17:35 UTC
There isn't enough current really.



While the cell may be 5V, that is open. Put load on it and it will drop.
?
2017-01-31 08:27:53 UTC
1
que p
2009-05-24 20:03:13 UTC
black should be negative, red should be positive, that's all you need.



conncect black to black and red to red



solar cells do not work with fluorescent lamps, they only work with sunlight or incandescent bulbs. If you use those energy saving lamps it will not work.



Notice on the video that he used an incandescent bulb and not a CFL or fluorescent lamp.
?
2016-12-24 19:06:31 UTC
a million: you're throwing away maximum of your ability in the 7805. in case you absoutely ought to, use a change mode regulator, and ideally a 6v battery precise off the panel (with opposite safety diode). 2: you probable choose a opposite safety diode on the regulator output.


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