John Watlington wrote: > On Apr 27, 2009, at 6:11 AM, Joel Stanley wrote: > >> Hello Wad, >> >> On Sun, Apr 26, 2009 at 12:35, John Watlington <w...@laptop.org> wrote: >>> On Apr 25, 2009, at 7:29 PM, p...@laptop.org wrote: >>>> - will we have (approximate) numbers at some point for how >>>> much power any given subsystem takes? (e.g., for the >>>> above case, how much would powering down the kbd/tpad >>>> save? this will inform decisions like "how much effort >>>> is it worth?") >>> I have estimates for the new sections, and we have numbers from >>> Tinderbox for the portions that aren't changing (keyboard, touchpad, >>> DCON, display). >> Out of interest, will the new PCB layout be tinderbox-friendly? Are >> you planning to wire a 1.5 up? > > Tinderbox friendly and production friendly are different goals. > A-phase will be tinderbox friendly, but the resistors will be > going away before C-phase.
I have a nice construction in a couple of pcbs: * Add a big (>= 0805) SMD resistor footprint in any lines you want to measure later on * add a trace from pad 1 to pad 2 * if you wnat to measure scratch away the trace (or add the trace to the next revision of the pcb) * soldere a shunt resistor on the footprint in the production phase just keep the shorted footprint.. i think that will add no cost to the pcb (and saves a small bit of time->money for the redesign) if anyone want to measure on a production unit they just cut the trace between the pads and adds a resitor (or the leads of an A meter) Reinder de Haan > > wad > > _______________________________________________ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel > _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel