Forums

pc motherboard grounds

Started by John Larkin August 25, 2012
On 25 Aug., 21:47, SoothSayer <SaySo...@TheMonastery.org> wrote:
> On Sat, 25 Aug 2012 15:13:40 -0400, John Ferrell <W8...@arrl.net> wrote: > >On Sat, 25 Aug 2012 09:34:54 -0700, John Larkin > ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: > > >>The mounting holes on PC motherboards: are they usually connected to > >>the PCB ground plane? > >Usually, but not always! > >John Ferrell W8CCW > > =A0 Of course they ALL are, idiot. =A0It is called a standard, and you ai=
n't
> bright enough to know that the makers had to follow one? > >
can't just say that without showing where in the spec it say that mounting holes have to be ground -Lasse
On Sat, 25 Aug 2012 16:08:25 -0700 (PDT), "langwadt@fonz.dk"
<langwadt@fonz.dk> wrote:

>On 25 Aug., 21:47, SoothSayer <SaySo...@TheMonastery.org> wrote: >> On Sat, 25 Aug 2012 15:13:40 -0400, John Ferrell <W8...@arrl.net> wrote: >> >On Sat, 25 Aug 2012 09:34:54 -0700, John Larkin >> ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: >> >> >>The mounting holes on PC motherboards: are they usually connected to >> >>the PCB ground plane? >> >Usually, but not always! >> >John Ferrell W8CCW >> >> &#2013266080; Of course they ALL are, idiot. &#2013266080;It is called a standard, and you ain't >> bright enough to know that the makers had to follow one? >> >> > >can't just say that without showing where in the spec it say that >mounting >holes have to be ground > >-Lasse
Just did, fuckhead.
On 26 Aug., 01:16, SoothSayer <SaySo...@TheMonastery.org> wrote:
> On Sat, 25 Aug 2012 16:08:25 -0700 (PDT), "langw...@fonz.dk" > > > > > > > > > > <langw...@fonz.dk> wrote: > >On 25 Aug., 21:47, SoothSayer <SaySo...@TheMonastery.org> wrote: > >> On Sat, 25 Aug 2012 15:13:40 -0400, John Ferrell <W8...@arrl.net> wrot=
e:
> >> >On Sat, 25 Aug 2012 09:34:54 -0700, John Larkin > >> ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: > > >> >>The mounting holes on PC motherboards: are they usually connected to > >> >>the PCB ground plane? > >> >Usually, but not always! > >> >John Ferrell W8CCW > > >> Of course they ALL are, idiot. It is called a standard, and you ain't > >> bright enough to know that the makers had to follow one? > > >can't just say that without showing where in the spec it say that > >mounting > >holes have to be ground > > >-Lasse > > =A0 Just did, fuckhead.
where?
On Sat, 25 Aug 2012 16:25:20 -0700 (PDT), "langwadt@fonz.dk"
<langwadt@fonz.dk> wrote:

>On 26 Aug., 01:16, SoothSayer <SaySo...@TheMonastery.org> wrote: >> On Sat, 25 Aug 2012 16:08:25 -0700 (PDT), "langw...@fonz.dk" >> >> >> >> >> >> >> >> >> >> <langw...@fonz.dk> wrote: >> >On 25 Aug., 21:47, SoothSayer <SaySo...@TheMonastery.org> wrote: >> >> On Sat, 25 Aug 2012 15:13:40 -0400, John Ferrell <W8...@arrl.net> wrote: >> >> >On Sat, 25 Aug 2012 09:34:54 -0700, John Larkin >> >> ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: >> >> >> >>The mounting holes on PC motherboards: are they usually connected to >> >> >>the PCB ground plane? >> >> >Usually, but not always! >> >> >John Ferrell W8CCW >> >> >> Of course they ALL are, idiot. It is called a standard, and you ain't >> >> bright enough to know that the makers had to follow one? >> >> >can't just say that without showing where in the spec it say that >> >mounting >> >holes have to be ground >> >> >-Lasse >> >> &#2013266080; Just did, fuckhead. > >where?
No, you fucking retard! I 'just did' what you said I can't do. Live with it, asswipe.
On Sat, 25 Aug 2012 15:39:45 -0700, SoothSayer <SaySooth@TheMonastery.org>
wrote:

>On Sat, 25 Aug 2012 15:59:56 -0400, "krw@att.bizzzzzzzzzzzz" ><krw@att.bizzzzzzzzzzzz> wrote: > >>On Sat, 25 Aug 2012 12:42:27 -0700, SoothSayer <SaySooth@TheMonastery.org> >>wrote: >> >>>On Sat, 25 Aug 2012 10:17:25 -0700, Joerg <invalid@invalid.invalid> >>>wrote: >>> >>>> >>>>I have seen both, >>> >>> Bullshit. You could not name even a single MOBO that has isolated >>>mount holes. It world fail to comply with the spec, and no maker ever >>>took that chance. >>> >>> You are a liar. You have NOT "seen both". >> >>AlwaysWrong is *always* wrong. Some come with plastic mounting posts, >>DimBulb. > > And there will ALWAYS BE a metallic screw or stud/standoff included, >you fucking zero memory retard!
Good grief, you're stupid, DimBulb. Read the question before you get your neuron twitching.
On Sat, 25 Aug 2012 15:47:58 -0700, SoothSayer <SaySooth@TheMonastery.org>
wrote:

>On Sat, 25 Aug 2012 13:51:57 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Sat, 25 Aug 2012 12:42:27 -0700, SoothSayer >><SaySooth@TheMonastery.org> wrote: >> >>>On Sat, 25 Aug 2012 10:17:25 -0700, Joerg <invalid@invalid.invalid> >>>wrote: >>> >>>> >>>>I have seen both, >>> >>> Bullshit. You could not name even a single MOBO that has isolated >>>mount holes. It world fail to comply with the spec, and no maker ever >>>took that chance. >> >>What spec? > > The AT design sped. Covers Power supplies, cases, FCC Rule 15 >compliance, emissions standards... things like that.
The AT design sped, AlwaysWrong? What's that? No, the ATX design spec does *not* cover these things. The FCC has their own ideas and even they don't care what you do with the screws.
> But YOU should already be familiar with many of the standards, and >especially the one which would require tying the motherboard ground plane >to the chassis.
Cite.
>YOU should already know all about why and the post >should never have been made.
YOU should have already read his question, AlwaysWrong.
> Then, there is basic common sense to follow as well. You seem to lack >any modicum of that as well.
Now, AlwaysWrong, don't get your neuron in a tizzy.
On Sat, 25 Aug 2012 16:08:25 -0700 (PDT), "langwadt@fonz.dk"
<langwadt@fonz.dk> wrote:

>On 25 Aug., 21:47, SoothSayer <SaySo...@TheMonastery.org> wrote: >> On Sat, 25 Aug 2012 15:13:40 -0400, John Ferrell <W8...@arrl.net> wrote: >> >On Sat, 25 Aug 2012 09:34:54 -0700, John Larkin >> ><jjlar...@highNOTlandTHIStechnologyPART.com> wrote: >> >> >>The mounting holes on PC motherboards: are they usually connected to >> >>the PCB ground plane? >> >Usually, but not always! >> >John Ferrell W8CCW >> >> &#2013266080; Of course they ALL are, idiot. &#2013266080;It is called a standard, and you ain't >> bright enough to know that the makers had to follow one? >> >> > >can't just say that without showing where in the spec it say that >mounting >holes have to be ground
It doesn't, but AlwaysWrong is, well, *always* wrong.
On Sat, 25 Aug 2012 15:09:16 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

>On Sat, 25 Aug 2012 10:31:03 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Sat, 25 Aug 2012 10:14:48 -0700, Jim Thompson >><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >> >>>On Sat, 25 Aug 2012 10:03:49 -0700, John Larkin >>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>> >>>>On Sat, 25 Aug 2012 09:40:54 -0700, Jim Thompson >>>><To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote: >>>> >>>>>On Sat, 25 Aug 2012 09:34:54 -0700, John Larkin >>>>><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >>>>> >>>>>> >>>>>> >>>>>>The mounting holes on PC motherboards: are they usually connected to >>>>>>the PCB ground plane? >>>>> >>>>>depends. Are you wearing them like you should ?:-) >>>>> >>>>> ...Jim Thompson >>>> >>>>You never actually say anything with content any more. You don't even >>>>discuss circuits in any intelligent way. You've become a useless old >>>>hen. >>> >>>And your WORKING circuits are WHERE ?:-) >>> >>> ...Jim Thompson >> >>A few are here: >> >>http://www.highlandtechnology.com/index.shtml >> >> >>Any your fast current source is where? You can't do it! >> >>I rather liked the mosfet-bipolar cascode with Ib correction, but you >>didn't. What did you find wrong with it? I mean, aside from the fact >>that I invented it. Are you claiming that this *won't* work? >> >>https://dl.dropbox.com/u/53724080/Circuits/Isrc_Ib_2.JPG >> >> >>But I have a couple of better, cuter circuits by now. Show us your >>approach, and then I'll post a couple more of mine. >> >>You never say anything substantive about electronics lately. You can't >>invent circuits any more. Go back to sci.electronics.basics where >>amateurs belong. > >Show some LTspice .ASC files that can be checked. Then people will >believe your claims. >
That's silly. If you can't look at a circuit and understand it, and decide how well it will work, and you need a simulator to do your thinking for you, then you are an amateur. I wouldn't Spice anything this simple. Good grief, you *don't* understand my circuit! -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
On Sat, 25 Aug 2012 15:47:58 -0700, SoothSayer
<SaySooth@TheMonastery.org> wrote:

>On Sat, 25 Aug 2012 13:51:57 -0700, John Larkin ><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: > >>On Sat, 25 Aug 2012 12:42:27 -0700, SoothSayer >><SaySooth@TheMonastery.org> wrote: >> >>>On Sat, 25 Aug 2012 10:17:25 -0700, Joerg <invalid@invalid.invalid> >>>wrote: >>> >>>> >>>>I have seen both, >>> >>> Bullshit. You could not name even a single MOBO that has isolated >>>mount holes. It world fail to comply with the spec, and no maker ever >>>took that chance. >> >>What spec? > > The AT design sped. Covers Power supplies, cases, FCC Rule 15 >compliance, emissions standards... things like that.
Post a link. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators
On Saturday, August 25, 2012 9:34:54 AM UTC-7, John Larkin wrote:

> The mounting holes on PC motherboards: are they usually=20 > connected to the PCB ground plane?=20
I haven't seen a mounting hole that was plated-through, but any copper ring= s surrounding a hole was always (?) connected to ground. OTOH other copper= foil running right next to the hole isn't always ground, and I've measured= 5V and 3.3V on some; in one case the copper on the left side of the hole w= as connected to the 5V supply and the copper on the right went the 3.3V (FI= C brand PA-2007 or VA-503+ motherboard)