View Single Post
Old 04-15-2012, 01:21 AM   #38
ProDigit
Karmaniac
ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.ProDigit ought to be getting tired of karma fortunes by now.
 
ProDigit's Avatar
 
Posts: 2,157
Karma: 9023682
Join Date: Oct 2008
Location: Miami FL
Device: PRS-505, Jetbook, Jetbook Mini, Jetbook Color, Astak Ez Reader Pro
USB ports are more flexible than you think. Just measure the voltage on a USB AC wall charger and you'll know it's seldom exactly 5V.

Connecting the solar panel to the battery might indeed be a better idea, as the battery will work like a capacitor.
The only thing I'd be worrying about is when the sun isn't shining, doesn't the panel consume some battery instead of providing power?

One thing I've thought of,is having a 6V panel, pasted on the back of the reader.
As long as the sun isn't shining fully on the panel, it'll never reach 6V.
Another thing is, that every device has a power LED, as well as this has an LED screen.
Both will dampen over-voltage (with over-voltage they perform better, and prevent the voltage from reaching too high). Before the power led would become unusually bright, or decolored, you'd be running at least 25-33% higher voltage. Also most of the internal CPU and stuff can handle a bit more than 10% overvoltage, especially with such low heat devices.
ProDigit is offline   Reply With Quote