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TUTORIAL - Example 1, Using Femm to Calculate Component Values of Simple Microstrip to use in LTspice/PSpice

Started by RobertMacy May 5, 2015
On 06/05/15 06:20, John Larkin wrote:
> All my app has to do is write a file, and it's automagically > replicated on all my PCs. > > One cool thing is that if Dropbox dropped off the face of the planet, > all my files would still be there, on all my PCs.
And if any one of those computers appears to its local Dropbox install to have deleted one of those files, poooff, it's gone from all of them. I use a Git repository, and push and pull updates manually. Each repository contains the entire history. Robert: If you want to use Dropbox but don't want their drivers and software running on your computer, you can still use the web-only service. Clifford Heath.
On a sunny day (Tue, 05 May 2015 13:20:58 -0700) it happened John Larkin
<jlarkin@highlandtechnology.com> wrote in
<f89ikalc7n00mk947gbj2hdk5pd8gc4sii@4ax.com>:

>On Tue, 05 May 2015 17:52:38 GMT, Jan Panteltje ><pNaonStpealmtje@yahoo.com> wrote: > >>On a sunny day (Tue, 05 May 2015 09:17:38 -0700) it happened John Larkin >><jlarkin@highlandtechnology.com> wrote in >><6oqhkateiv4tepob4p8ttpr7qj0b3evpck@4ax.com>: >> >>>The automation of our cabin in the mountains (remote cam and heating >>>control) is also through shared files on Dropbox. >> >>As I just demonstrated again, running your own server is no problem at all, >>so you do not need dropping boxes. > >Dropbox runs a nice server farm (Amazon's actually), all backed up and >stuff. All my app has to do is write a file, and it's automagically >replicated on all my PCs. > >One cool thing is that if Dropbox dropped off the face of the planet, >all my files would still be there, on all my PCs. > >I work at work, at home, in the cabin, and sometimes on the road. I >can do anything anywhere with minimal overhead.
Well, that was the idea behind yahoo mail, could access it from anywhere, airport, home, train, sea. I still use it for emergency and not urgent stuff. They data-mine everything. It is infested with irritating useless stuff and what is left does not work right. So, given your own server and ssh in Linux, what is it you cannot do? Plus I have a website hosted in 'merrica for a few dollars a year. that does not work right and the helpdesk is useless, so again and again I think about moving the site back here too. In fact it is up now and then. It is not that a 'server' is something special, every 35$ IP webcam is one. My Linksys WiFi access point is one, it used to be online, did not want to go into programming MIPS and the Raspi takes less power. I do have the MIPS cross compiler installed on an other PC. Anyways, server-push... I just wrote an other internet server see my posting in sci.crypt, so might as well use the code and get rid of Apache and php, and read up on server-push in html5 and DIY . Amazing when I was backing up that 16GB SDcard (it uses tar -zcvf) I see all those files fly by, 90% of the sh*t on that Raspi should not need to be there, like PCI drivers in Linux kernel LOL, plus all those network cards, plus Qt? Plus... you would not believe the age of bloat we are in. Sure, I can do web server on a PIC 18F (I did a UDP stack for the LED lights on it), so ... I had a nightmare that I was working for a Telco and boss made a 8 layer board with a signal generator that spit out random noise to fill up the part of spectrum he was not using, hard to argue, I woke up, did I eat something wrong ;-)?
On 5/6/2015 1:29 AM, Clifford Heath wrote:
> On 06/05/15 06:20, John Larkin wrote: >> All my app has to do is write a file, and it's automagically >> replicated on all my PCs. >> >> One cool thing is that if Dropbox dropped off the face of the planet, >> all my files would still be there, on all my PCs. > > And if any one of those computers appears to its local Dropbox install > to have deleted one of those files, poooff, it's gone from all of them. > > I use a Git repository, and push and pull updates manually. Each > repository contains the entire history.
+1. I do the same thing. Git also protects you against file corruption--if corruption happens to a file before committing, you can go back to the last uncorrupted version using the cherry-pick function. If it happens to the repository, it'll flunk the integrity check, and won't overwrite the good copies. It runs nicely over ssh with a forwarded port, so my servers don't expose any well-known ports to the public net. My old method was to periodically make zipfile images of each project. When I migrated to git, I wrote a script that, starting with the oldest image, unzipped them into a clean directory and committed all the files. So I now have complete git histories dating back way before git was even written. ;) Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
On 5/5/2015 10:11 PM, John Larkin wrote:
> On Wed, 06 May 2015 07:40:38 +1000, "David Eather" <eather@tpg.com.au> > wrote: > >> On Wed, 06 May 2015 02:17:38 +1000, John Larkin >> <jlarkin@highlandtechnology.com> wrote: >> >>> On Tue, 05 May 2015 08:05:52 -0700, RobertMacy >>> <robert.a.macy@gmail.com> wrote: >>> >>>> On Tue, 05 May 2015 05:17:57 -0700, Phil Hobbs <pcdhobbs@gmail.com> >>>> wrote: >>>> >>>>> How about putting it on Dropbox or someplace like that? >>>>> >>>>> ABSE would work for many of us as well. >>>>> >>>>> Cheers >>>>> >>>>> Phil Hobbs >>>> >>>> Does nobody read?! I constantly complain about the 'toxicity' of those >>>> websites, Dropbox, etc. Dropbox and all those 'free' websites sell >>>> something to somebody ...else, Their customers are NOT the users. Those >>>> websites start 'poking' around inside our PC's, causing hangs, and worst >>>> of all, total crashes that require Power OFF reboots! And the times I >>>> sit >>>> and wait and wait and they didn't crash us, they didn't even give me >>>> access to what somebody dropped there. So, NO I now NEVER you those >>>> 'free' >>>> websites. >>> >>> I'm not aware of any problems with Dropbox, except that it seems to >>> slow down my computers a bit, which is reasonable since it's doing a >>> lot of file transfers and checks and stuff. I no longer need to carry >>> memory sticks around, and have access to my stuff on my 4 working >>> computers scattered around the state. I think their biz model is to >>> give away a couple of gigabtyes of storage, get people hooked, and get >>> a few percent of their users (like me) to pay for more. >>> >>> Dropbox is wonderful. The future is access to your stuff anywhere, >>> anytime, on any device. >> >> Yes, persistent Internet threats (black hat hackers)love dropbox. It puts >> a big security hole in your system. >> > > > The worst they might do is read some files. A serious black hat isn't > going to be interested in my schematics and manuals and Spice files > and pictures of ski lifts. > >
I wouldn't be too sure about that. Seems that it runs code on your machine without you knowing about it, under the control of a remote server. And, of course, as the saying goes, "if it's free, you're not the customer, you're the product." Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
On Tue, 05 May 2015 22:29:38 -0700, Clifford Heath <no.spam@please.net>  
wrote:

>> ...snip... > Robert: If you want to use Dropbox but don't want their drivers and > software running on your computer, you can still use the web-only > service. > > Clifford Heath.
Thanks for the suggestion, Clifford, but the 'last' time I tried to use Dropbox, ir took over an hour. I never did get registered, so was never offered any 'choice' of type of posting. However during that time, Dropbox kept me from doing nything else, with a hanging PC, small few seconds to try to use the PC for something else, hang the PC, a few small seconds to try to use the PC for something else, hang the PC, etc and most of the time show something, then blank screen until next screen. Uet, could hear the PC doing a LOT of activity ...so killed the connection. When I purged that system to clean it out, purging images, took a VERY long time and found that my cookies had doubled with a myriad of those 'tracking' cookies, etc. Absolutely unrelated to Dropbox. So I learned to stay away from Dropbox.
On 06/05/15 15:45, Phil Hobbs wrote:
> So I now have complete git histories dating back way before git was even > written. ;)
I have some of those too, imported from SVN using git-svn.
On Wed, 06 May 2015 12:11:05 +1000, John Larkin  
<jlarkin@highlandtechnology.com> wrote:

> On Wed, 06 May 2015 07:40:38 +1000, "David Eather" <eather@tpg.com.au> > wrote: > >> On Wed, 06 May 2015 02:17:38 +1000, John Larkin >> <jlarkin@highlandtechnology.com> wrote: >> >>> On Tue, 05 May 2015 08:05:52 -0700, RobertMacy >>> <robert.a.macy@gmail.com> wrote: >>> >>>> On Tue, 05 May 2015 05:17:57 -0700, Phil Hobbs <pcdhobbs@gmail.com> >>>> wrote: >>>> >>>>> How about putting it on Dropbox or someplace like that? >>>>> >>>>> ABSE would work for many of us as well. >>>>> >>>>> Cheers >>>>> >>>>> Phil Hobbs >>>> >>>> Does nobody read?! I constantly complain about the 'toxicity' of those >>>> websites, Dropbox, etc. Dropbox and all those 'free' websites sell >>>> something to somebody ...else, Their customers are NOT the users. >>>> Those >>>> websites start 'poking' around inside our PC's, causing hangs, and >>>> worst >>>> of all, total crashes that require Power OFF reboots! And the times I >>>> sit >>>> and wait and wait and they didn't crash us, they didn't even give me >>>> access to what somebody dropped there. So, NO I now NEVER you those >>>> 'free' >>>> websites. >>> >>> I'm not aware of any problems with Dropbox, except that it seems to >>> slow down my computers a bit, which is reasonable since it's doing a >>> lot of file transfers and checks and stuff. I no longer need to carry >>> memory sticks around, and have access to my stuff on my 4 working >>> computers scattered around the state. I think their biz model is to >>> give away a couple of gigabtyes of storage, get people hooked, and get >>> a few percent of their users (like me) to pay for more. >>> >>> Dropbox is wonderful. The future is access to your stuff anywhere, >>> anytime, on any device. >> >> Yes, persistent Internet threats (black hat hackers)love dropbox. It >> puts >> a big security hole in your system. >> > > > The worst they might do is read some files. A serious black hat isn't > going to be interested in my schematics and manuals and Spice files > and pictures of ski lifts. > > Dropbox doesn't seem to have had any security issues in the last > couple of years. Windows has had, what, hundreds? > >
The worst they might do is take your designs and ideas and use them in China (PIT is a a euphemism for China state sponsored hackers). They may also backdoor your system so they always have access regardless of if you keep dropbox or not - and then you might find some defense contractors refusing to work with you because they have been waived off by the FBI/NSA. Last they might just destroy your harddisk data and structure as a standard response to a virus scanner. Dropbox unnecessarily increases the 'attack surface' and relies mostly on other people (who have more interesting things to do / check / hack) for its security. Simply to work dropbox must allow someone else remote access to your harddrive. Windows is also a problem, but it is patched monthly (now even more regularly) and a lot of people are looking at its security. Windows can run (should run - you should change the settings to make sure) without giving remote access to you files and it plays properly with anti virus and anti exploit software.
Den torsdag den 7. maj 2015 kl. 01.58.54 UTC+2 skrev David Eather:
> On Wed, 06 May 2015 12:11:05 +1000, John Larkin > <jlarkin@highlandtechnology.com> wrote: > > > On Wed, 06 May 2015 07:40:38 +1000, "David Eather" <eather@tpg.com.au> > > wrote: > > > >> On Wed, 06 May 2015 02:17:38 +1000, John Larkin > >> <jlarkin@highlandtechnology.com> wrote: > >> > >>> On Tue, 05 May 2015 08:05:52 -0700, RobertMacy > >>> <robert.a.macy@gmail.com> wrote: > >>> > >>>> On Tue, 05 May 2015 05:17:57 -0700, Phil Hobbs <pcdhobbs@gmail.com> > >>>> wrote: > >>>> > >>>>> How about putting it on Dropbox or someplace like that? > >>>>> > >>>>> ABSE would work for many of us as well. > >>>>> > >>>>> Cheers > >>>>> > >>>>> Phil Hobbs > >>>> > >>>> Does nobody read?! I constantly complain about the 'toxicity' of those > >>>> websites, Dropbox, etc. Dropbox and all those 'free' websites sell > >>>> something to somebody ...else, Their customers are NOT the users. > >>>> Those > >>>> websites start 'poking' around inside our PC's, causing hangs, and > >>>> worst > >>>> of all, total crashes that require Power OFF reboots! And the times I > >>>> sit > >>>> and wait and wait and they didn't crash us, they didn't even give me > >>>> access to what somebody dropped there. So, NO I now NEVER you those > >>>> 'free' > >>>> websites. > >>> > >>> I'm not aware of any problems with Dropbox, except that it seems to > >>> slow down my computers a bit, which is reasonable since it's doing a > >>> lot of file transfers and checks and stuff. I no longer need to carry > >>> memory sticks around, and have access to my stuff on my 4 working > >>> computers scattered around the state. I think their biz model is to > >>> give away a couple of gigabtyes of storage, get people hooked, and get > >>> a few percent of their users (like me) to pay for more. > >>> > >>> Dropbox is wonderful. The future is access to your stuff anywhere, > >>> anytime, on any device. > >> > >> Yes, persistent Internet threats (black hat hackers)love dropbox. It > >> puts > >> a big security hole in your system. > >> > > > > > > The worst they might do is read some files. A serious black hat isn't > > going to be interested in my schematics and manuals and Spice files > > and pictures of ski lifts. > > > > Dropbox doesn't seem to have had any security issues in the last > > couple of years. Windows has had, what, hundreds? > > > > > > The worst they might do is take your designs and ideas and use them in > China (PIT is a a euphemism for China state sponsored hackers). They may > also backdoor your system so they always have access regardless of if you > keep dropbox or not - and then you might find some defense contractors > refusing to work with you because they have been waived off by the > FBI/NSA. Last they might just destroy your harddisk data and structure as > a standard response to a virus scanner. > > Dropbox unnecessarily increases the 'attack surface' and relies mostly on > other people (who have more interesting things to do / check / hack) for > its security. Simply to work dropbox must allow someone else remote access > to your harddrive.
no more than any webbrowser, computer asks dropbox for files -Lasse
On Thu, 07 May 2015 10:43:05 +1000, Lasse Langwadt Christensen  
<langwadt@fonz.dk> wrote:

> Den torsdag den 7. maj 2015 kl. 01.58.54 UTC+2 skrev David Eather: >> On Wed, 06 May 2015 12:11:05 +1000, John Larkin >> <jlarkin@highlandtechnology.com> wrote: >> >> > On Wed, 06 May 2015 07:40:38 +1000, "David Eather" <eather@tpg.com.au> >> > wrote: >> > >> >> On Wed, 06 May 2015 02:17:38 +1000, John Larkin >> >> <jlarkin@highlandtechnology.com> wrote: >> >> >> >>> On Tue, 05 May 2015 08:05:52 -0700, RobertMacy >> >>> <robert.a.macy@gmail.com> wrote: >> >>> >> >>>> On Tue, 05 May 2015 05:17:57 -0700, Phil Hobbs <pcdhobbs@gmail.com> >> >>>> wrote: >> >>>> >> >>>>> How about putting it on Dropbox or someplace like that? >> >>>>> >> >>>>> ABSE would work for many of us as well. >> >>>>> >> >>>>> Cheers >> >>>>> >> >>>>> Phil Hobbs >> >>>> >> >>>> Does nobody read?! I constantly complain about the 'toxicity' of >> those >> >>>> websites, Dropbox, etc. Dropbox and all those 'free' websites sell >> >>>> something to somebody ...else, Their customers are NOT the users. >> >>>> Those >> >>>> websites start 'poking' around inside our PC's, causing hangs, and >> >>>> worst >> >>>> of all, total crashes that require Power OFF reboots! And the >> times I >> >>>> sit >> >>>> and wait and wait and they didn't crash us, they didn't even give >> me >> >>>> access to what somebody dropped there. So, NO I now NEVER you those >> >>>> 'free' >> >>>> websites. >> >>> >> >>> I'm not aware of any problems with Dropbox, except that it seems to >> >>> slow down my computers a bit, which is reasonable since it's doing a >> >>> lot of file transfers and checks and stuff. I no longer need to >> carry >> >>> memory sticks around, and have access to my stuff on my 4 working >> >>> computers scattered around the state. I think their biz model is to >> >>> give away a couple of gigabtyes of storage, get people hooked, and >> get >> >>> a few percent of their users (like me) to pay for more. >> >>> >> >>> Dropbox is wonderful. The future is access to your stuff anywhere, >> >>> anytime, on any device. >> >> >> >> Yes, persistent Internet threats (black hat hackers)love dropbox. It >> >> puts >> >> a big security hole in your system. >> >> >> > >> > >> > The worst they might do is read some files. A serious black hat isn't >> > going to be interested in my schematics and manuals and Spice files >> > and pictures of ski lifts. >> > >> > Dropbox doesn't seem to have had any security issues in the last >> > couple of years. Windows has had, what, hundreds? >> > >> > >> >> The worst they might do is take your designs and ideas and use them in >> China (PIT is a a euphemism for China state sponsored hackers). They may >> also backdoor your system so they always have access regardless of if >> you >> keep dropbox or not - and then you might find some defense contractors >> refusing to work with you because they have been waived off by the >> FBI/NSA. Last they might just destroy your harddisk data and structure >> as >> a standard response to a virus scanner. >> >> Dropbox unnecessarily increases the 'attack surface' and relies mostly >> on >> other people (who have more interesting things to do / check / hack) for >> its security. Simply to work dropbox must allow someone else remote >> access >> to your harddrive. > > no more than any webbrowser, computer asks dropbox for files > > > > -Lasse
Ah, not up on the term 'attack surface'. Drop box adds an additional unnecessary source of security vulnerabilities for a hacker to exploit - hence a computer running drop box is a bigger target because the number of vulnerabilities has increased - hence 'attack surface'. Yes, perhaps it is in some ways similar to a web browser, but web browsers attract more attention from security experts and you normally don't have them auto-loading and running 24/7.
Den torsdag den 7. maj 2015 kl. 22.43.38 UTC+2 skrev David Eather:
> On Thu, 07 May 2015 10:43:05 +1000, Lasse Langwadt Christensen > <langwadt@fonz.dk> wrote: > > > Den torsdag den 7. maj 2015 kl. 01.58.54 UTC+2 skrev David Eather: > >> On Wed, 06 May 2015 12:11:05 +1000, John Larkin > >> <jlarkin@highlandtechnology.com> wrote: > >> > >> > On Wed, 06 May 2015 07:40:38 +1000, "David Eather" <eather@tpg.com.au> > >> > wrote: > >> > > >> >> On Wed, 06 May 2015 02:17:38 +1000, John Larkin > >> >> <jlarkin@highlandtechnology.com> wrote: > >> >> > >> >>> On Tue, 05 May 2015 08:05:52 -0700, RobertMacy > >> >>> <robert.a.macy@gmail.com> wrote: > >> >>> > >> >>>> On Tue, 05 May 2015 05:17:57 -0700, Phil Hobbs <pcdhobbs@gmail.com> > >> >>>> wrote: > >> >>>> > >> >>>>> How about putting it on Dropbox or someplace like that? > >> >>>>> > >> >>>>> ABSE would work for many of us as well. > >> >>>>> > >> >>>>> Cheers > >> >>>>> > >> >>>>> Phil Hobbs > >> >>>> > >> >>>> Does nobody read?! I constantly complain about the 'toxicity' of > >> those > >> >>>> websites, Dropbox, etc. Dropbox and all those 'free' websites sell > >> >>>> something to somebody ...else, Their customers are NOT the users. > >> >>>> Those > >> >>>> websites start 'poking' around inside our PC's, causing hangs, and > >> >>>> worst > >> >>>> of all, total crashes that require Power OFF reboots! And the > >> times I > >> >>>> sit > >> >>>> and wait and wait and they didn't crash us, they didn't even give > >> me > >> >>>> access to what somebody dropped there. So, NO I now NEVER you those > >> >>>> 'free' > >> >>>> websites. > >> >>> > >> >>> I'm not aware of any problems with Dropbox, except that it seems to > >> >>> slow down my computers a bit, which is reasonable since it's doing a > >> >>> lot of file transfers and checks and stuff. I no longer need to > >> carry > >> >>> memory sticks around, and have access to my stuff on my 4 working > >> >>> computers scattered around the state. I think their biz model is to > >> >>> give away a couple of gigabtyes of storage, get people hooked, and > >> get > >> >>> a few percent of their users (like me) to pay for more. > >> >>> > >> >>> Dropbox is wonderful. The future is access to your stuff anywhere, > >> >>> anytime, on any device. > >> >> > >> >> Yes, persistent Internet threats (black hat hackers)love dropbox. It > >> >> puts > >> >> a big security hole in your system. > >> >> > >> > > >> > > >> > The worst they might do is read some files. A serious black hat isn't > >> > going to be interested in my schematics and manuals and Spice files > >> > and pictures of ski lifts. > >> > > >> > Dropbox doesn't seem to have had any security issues in the last > >> > couple of years. Windows has had, what, hundreds? > >> > > >> > > >> > >> The worst they might do is take your designs and ideas and use them in > >> China (PIT is a a euphemism for China state sponsored hackers). They may > >> also backdoor your system so they always have access regardless of if > >> you > >> keep dropbox or not - and then you might find some defense contractors > >> refusing to work with you because they have been waived off by the > >> FBI/NSA. Last they might just destroy your harddisk data and structure > >> as > >> a standard response to a virus scanner. > >> > >> Dropbox unnecessarily increases the 'attack surface' and relies mostly > >> on > >> other people (who have more interesting things to do / check / hack) for > >> its security. Simply to work dropbox must allow someone else remote > >> access > >> to your harddrive. > > > > no more than any webbrowser, computer asks dropbox for files > > > > > > > > -Lasse > > > Ah, not up on the term 'attack surface'. Drop box adds an additional > unnecessary source of security vulnerabilities for a hacker to exploit - > hence a computer running drop box is a bigger target because the number of > vulnerabilities has increased - hence 'attack surface'. Yes, perhaps it is > in some ways similar to a web browser, but web browsers attract more > attention from security experts and you normally don't have them > auto-loading and running 24/7.
not 24/7 only 99.9% of the time most PC are on .. and dropbox has the advantage that they don't have to protect against attacks from code run to display webpages from anyone of billions of webservers -Lasse