View Single Post
Old 01-28-2016, 09:34 AM   #4
knc1
Going Viral
knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.knc1 ought to be getting tired of karma fortunes by now.
 
knc1's Avatar
 
Posts: 17,212
Karma: 18210809
Join Date: Feb 2012
Location: Central Texas
Device: No K1, PW2, KV, KOA
Quote:
Originally Posted by abarthch View Post
I forgot to mention that the first time I got a green light was after about 4 hours of continuous charging (or maybe not exactly continuous, when you consider that the charging was interrupted every minute for a few seconds). So the battery seems to be doing fine so far.
- - - -
Little details like that make a difference.

That's 12 volt, RS-232 serial (similar to a COM port - back in the days when computers had COM ports).

It is unlikely that the Kindle's nano-powered CMOS port can pull the signal line to zero (unable to sink enough current).

The Kindle's port evidently can tolerate 3v3 signal levels, other people have used that rather than 1v8 - it is just that I can't recommend it.
(The hardware reference manual is silent on the subject.)

Last edited by knc1; 01-28-2016 at 09:39 AM.
knc1 is offline   Reply With Quote