Hello Everyone!
I have been thinking about this for a while, now I finally made it: My solar powered Kindle Touch!
Here is what I did:
The main component is a Maxim 1551 LiPo charge controller (
http://datasheets.maxim-ic.com/en/ds...51-MAX1555.pdf)
You can get a free engineerings sample directly from Maxim.
The other component is a PowerFilm® MPT6-75 flexible Solar cell (
http://www.ebay.de/itm/PowerFilm-MPT...item3f00057552)
The Maxim 1551 doesn't need much more, three 1uF Capacitors (I took two 0.47 uF in parallel as they are slightly thinner) and that's it.
For testing I added a control led, that indicates that there is power from the solar panel.
The solar panel is attached to the DC in, as it accepts higher voltages than the usb in.
With this Setup I was able to get a charge rate of 50 mA in direct sunlight, which should charge the battery completely in about 30 hrs in the sun.
I don't have long time experience with it so far, but that should be enough so I never will have to charge my kindle again with a wall adapter, but I will let you know...
So for about $20 you have a solar powered kindle!
AS ALWAYS: BE CAREFULL IF YOU TRY TO COPY THIS, I AM NOT RESPONSIBLE FOR ANY DAMAGE TO YOUR KINDLE OR ANYTHING ELSE!