Am Do 28. Februar 2008 schrieb Uncle Kridley: > Michael Shiloh wrote: > > There will be a charger for the Neo Freerunner, which has the secret > > resistor jOERG mentions below. > > Does this mean that it won't charge (or will only charge slowly) from a > generic USB connector/charger? Part of the point of USB charging is > that you don't need a proprietary charger for every device you own. If > the Freerunner won't charge off generic USB, I'll be sad.
Though i have no clue what's really going on with this, there are some facts that might help imagine: - USB-clients (like NEO in charge mode) may pull 100mA from a USB-host. With advertising (i guess, via some USB-data protocol), a device may increase allowable current to 500mA. However many clients break this spec, by either not advertising or drawing >500mA. - Everything over 500mA is considered illegal and may (also _should_ not) damage host USB adapters. (there are chances to kill a laptop USB port with external HD-drives! If both are sloppy designed) - For quick charge purposes, NEO might well take 1 - 2 A from USB adapter. However extreme care should be taken not to "smoke up" a poor designed host. So maybe: - charge from any host (incl simplistic chargers): 100mA (6-12h) - charge from "intelligent" host: 500mA (1-2h) - charge from quickcharger with magic R: 1500mA (<1h) Switching to fast and/or ultrafast charge mode possible also with prev. mentioned script. jOERG _______________________________________________ OpenMoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community