Rockbox mail archiveSubject: AW: AW: AW: AW: Bug: Battery Charging with low voltage
AW: AW: AW: AW: Bug: Battery Charging with low voltage
From: Matthias Klumpp <Matthias.Klumpp_at_gmx.de>
Date: Fri, 4 Feb 2005 19:58:52 +0100
1st (as usual) the test results of today:
- your SW NOT flashed
- started 8:33
- got stuck 14:00
- this time I didn't need to disconnect/re-connect the charger
- it was sufficient to start playing again
- at 16:23 batteries were low (no boot anymore)
So (unfortunately) for my situation, it seems that the done fix is not
changing the situation.
Following some comments acc. to you last mail.
# -----Ursprungliche Nachricht-----
# Von: rockbox-bounces_at_cool.haxx.se
# [mailto:rockbox-bounces_at_cool.haxx.se]Im Auftrag von Linus Nielsen
# Gesendet: Donnerstag, 3. Februar 2005 20:42
# An: Rockbox development
# Betreff: Re: AW: AW: AW: Bug: Battery Charging with low voltage
# This is because of the voltage "dips" when the battery is
# low, combined with a bad grounding. The button driver thinks that OFF is
# because the port pin for the OFF key shows a 0.
I guess I finally understood the "GND problem" ;-))
You were not talking about a permanent ground problem, but only about some
Ok, that might be.
That also means, possibly any "shock" on the table (where the JB is) could
have been caused such a dip.
Isn't there any input filter to filter out such "peaks & dips" ;-)) ?
# > The (flashed) FW was then possibly stopping and returned
# > to the browse screen.
# Yeah, the OFF key problem again.
Ok, it is getting clearer :-O)
# If you only get 4h play time from your 2000mAh batteries,
# even with the Archos charging, something must be wrong, either with your
# batteries or your jukebox hardware.
You are frighting me ;-o?
# I believe that the Archos algorithm isn't very sophisticated, so it
# doesn't properly determine that the batteries are really full.
Maybe, but at least it is the same starting condition for every test I do.
# > Wouldn't it be a possible way (or better workaround) to
# implement something
# > like a "aggressive charging mode", user configurable in
# the settings:
# > - start charging immediately after the charger is detected
# > - we already have the bat. capacity in the settings
# > - there could be a 2nd parameter where the user specifies
# the charging
# > voltage (don't know if RB can get it from ADC)
# I have some ideas about finding out the charging voltage,
# but the best might be to have a setting for it.
Will you follow to find a SW fix for that ?
THX a lot
Received on 2005-02-04