On Wed, Jan 27, 2016 at 6:17 PM, John Jason Jordan <[email protected]> wrote:
> On Wed, 27 Jan 2016 17:17:20 -0800 > Dick Steffens <[email protected]> dijo: > > >On 01/27/2016 05:08 PM, wes wrote: > >> the center pin is a "data" line, the computer uses it to identify > >> the power adapter powering it. the computer may refuse to do things > >> like run at full speed, or charge the battery, if it cannot verify > >> that the power adapter is capable of handling that load. > >> > >> I think it's some sort of fire prevention scheme? > > >Interesting. Overload protection sounds logical. > > The power brick for my System76 laptop has four contacts. I have been > told that the extra contacts are to communicate the charge level of the > battery to the brick, lest it overcharge the battery. I'm not sure I > buy that, but then, I'm not terribly clever with electrical circuits. well your power brick is more like a small nuclear reactor so who knows what sort of crazy magic tricks it can do? -wes _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
