<xiangfu>
wpwrak: I have learned a lot hardware/manufacture when doing this mining machine.
<xiangfu>
what should I change on thresh in my boards? only PCB, no case?
<xiangfu>
I tried put some plastics on top of the touch bar. it is hard to find out the good one.
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<wpwrak>
(thresh) maybe start with 500 then increase in large steps
<wpwrak>
(board & case) the mentioning of board and case in the comments is just that - a comment. the information isn't used anywhere. so you can use whatever you like there. similar for the "name" field. you can also just not set a name.
<wpwrak>
(finding plastic) yeah, it'll be total guesswork :) but don't worry. tuning the slider is no exact science. just set a value, see how it responds, then adjust, and so on.
<wpwrak>
if the threshold is too low, then the position indicator appears before you have a proper touch. e.g., when the finger is just approaching the sensor or when you touch it very lightly. also, when pushing harder, the position marker will move a fair bit as pressure increases.
<wpwrak>
if the threshold is too high, no position marker appears at all or it flickers (rapidly appears and disappears)
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<arossdotme>
should usb hubs have cap's? got a one here that have places for 2caps but there missing
<arossdotme>
i forget the type name, you know the big blue non-smt type, the liquid sort
<wpwrak>
almost all electronics have caps :) large electrolytic caps would be a bit unusual in a hub, but not impossible
<wpwrak>
and if they're missing, perhaps it doesn't need them :) could be that the same pcb is used in different products / modes of operation
<wpwrak>
e.g., i would expect a self-powered hub to have some silo caps on the power supply side.
<roh>
hi there
<roh>
i got a idea to bounce off you guys: what about a robots.txt for 'projects' ?
<roh>
with all the project 'metadata' like contacts, project status, etc in machine readable, so distros/upstreams can import/source it
<wpwrak>
who would use this metadata ? first time i see this kind of use of robots.txt
<roh>
mainly for distros/downstream
<roh>
to speed up the maintaining/security support
<wpwrak>
so that would act as a sort of notification channel for urgent updates ?
<roh>
like its now, but with the feature that you can update the links centrally
<roh>
e.g. send updates via mailinglists, add an entry to the rss feed of your security incident site, and bump the version
<roh>
also a downstream user would have a defined place to find stuff like security contacts. i also imagine its easy to integrate into stuff like launchpad and ticketing systems
<wpwrak>
i guess all contacts really boil down to the qi-hw mailing list :)
<roh>
imagine you would need to find a specific security contact for a piece of code in your distro and you want to mail the maintainer, the security contact and the distros security contact.. thats 3 manual to search mailaddresses. or a lookup in 2 textfiles.
<wpwrak>
yeah, i'd expect the each distro to compile this sort of information in whatever format they use. well, that could of course come from a robots.txt, if anyone actually thinks of looking there
<wpwrak>
perhaps more importantly, how would it be populated ? i see some fields that would come from a commit hook, right ?
<wpwrak>
hmm, interesting. neighbours a few floors down are busy painting a visibly dirty terrace floor. first i thought they were just cleaning it, but then the inside of the water bucket wouldn't be all red ...
<pcercuei>
lol
<arossdotme>
robots.txt is a web thing. it's for search engines, in the file you say if you mind them indexing this or that.
<arossdotme>
wpwrak: thanks for the info.
<arossdotme>
this as not externel powerr
<arossdotme>
as=has
<arossdotme>
I've got other ones with no external power
<arossdotme>
and no caps
<arossdotme>
I plan to use one powered from a usb power bank battery to power a usb hub and devices, with my zipit pocket compute rand my gtao4
<arossdotme>
gta04
<wpwrak>
bus-powered hubs can't have a lot of caps because the usb standard limits the capacitive upstream load. i mean, you could have massive caps behind a big resistor, but why bother. and the few hundred uF you'll want in your design in total don't really need electrolytic caps. well, if you really *like* them, you can of course use such critters ...
<arossdotme>
ok
<arossdotme>
thx for the info
<arossdotme>
didn't know there was a limit in the usb stanard but me thinks it makes sense
<wpwrak>
"The maximum load (CRPB) that can be placed at the downstream end of a cable is 10 µF in parallel with 44 Ohm." :)
<wpwrak>
so the 44 Ohm would be the "big" resistor. behind it you can put as many caps as you like, but they'll charge slowly.
<wpwrak>
(the quote is from usb 2.0, page 177, "7.2.4.1 Inrush Current Limiting")