Re: [GTALUG] Security cams question

[Digimer via talk]

On 2019-02-09 8:25 a.m., o1bigtenor via talk wrote:
> Greetings
> 
> I am looking into using a security cam to observe animal behavior in an area.
> 
> So I would like to use a camera that is IR capable to 30 m but what
> I'm not finding is anything that I can run on Linux - - - just M$ is
> listed.
> 
> Has anyone out there played with security cams that might be able to help?
> 
> TIA
> 
> Dee

I'm in the process of building a system for my house, and local and SD
Card recording was key. I've settled on Reolink RLC-420 cameras
(https://reolink.com/product/rlc-420/). I got the first one working with
Zoneminder already, though I still need to tune the config (going to do
that after I finish running the wires).

Here's a sample video I took while testing;

https://www.youtube.com/watch?v=3lFlD1ZflUY

Good IR, good picture quality, weak microphone, but it at least has one.
Works on android for recording on the phone/tablet as well.

For Zoneminder, I installed it fine on CentOS 7. It was not the simplest
setup, but that's because of how feature-full ZM is. I read the README
though and had no trouble. The camera itself is all metal construction,
which surprised me.

I picked up Sandisk high-endurance SDCards, 64GB
(https://www.amazon.ca/SanDisk-Endurance-Monitoring-Adapter-SDSDQQ-064G-G46A/dp/B00V5Q1N1I).
I've not used these before, but I've installed one in my dashcam for my
car and in all the cameras. So we'll see in a year or so how they hold up.

This isn't a long term or in-depth results or review, but it's what I've
found so far.

digimer

-- 
Digimer
Papers and Projects: https://alteeve.com/w/
"I am, somehow, less interested in the weight and convolutions of
Einstein’s brain than in the near certainty that people of equal talent
have lived and died in cotton fields and sweatshops." - Stephen Jay Gould
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Re: [GTALUG] Software to draw illustrations?

[Kevin Cozens via talk]

On 2019-02-10 6:49 p.m., Chris F.A. Johnson via talk wrote:

If you can write Forth, you can write PS.


If you can write Forth or if you are used to using RPN calculators you can 
write PS. I wrote some PS code for a project I worked on a few years ago. It 
generated three separate graphs that were printed on a single page.


--
Cheers!

Kevin.

http://www.ve3syb.ca/   | "Nerds make the shiny things that
https://www.patreon.com/KevinCozens | distract the mouth-breathers, and
| that's why we're powerful"
Owner of Elecraft K2 #2172  |
#include  | --Chris Hardwick
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Re: [GTALUG] Software to draw illustrations?

[Chris F.A. Johnson via talk]

On Sun, 10 Feb 2019, Bob Jonkman via talk wrote:


On 2019-02-10 2:51 a.m., Chris F.A. Johnson via talk wrote:
> I use emacs to write PostScript programs and convert them to JPG or 
GIF or PNG with ImageMagick.


I use a horseshoe magnet to manipulate the bits directly on a floppy 
disk, then output them to paper tape on my PDP-8...


--Bob.

(but really, I never considered PS a human-writeable language!)


If you can write Forth, you can write PS.

I also generate PS with other programs.
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Re: [GTALUG] Software to draw illustrations?

[Stewart C. Russell via talk]

On 2019-02-10 11:56 a.m., Giles Orr via talk wrote:
>
> I understand Inkscape is excellent in its domain - vector-based drawing

It is. I basically live in it, and have done for the last three years.

You *can* do photo work in it, but I don't recommend it. In the same
way, you *can* do vector work in Gimp using paths — but I really don't
recommend that, either.

I wouldn't use Inkscape for mathematics. LibreOffice equation editor is
okay, if you must. Geogebra is rather good for mathematical diagrams and
equations and is a fun program to mess around with if you're nerdly
inclined.

cheers,
 Stewart

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Re: [GTALUG] Software to draw illustrations?

[Kevin Cozens via talk]

On 2019-02-10 12:51 a.m., William Park via talk wrote:

What software do people use to draw illustrations that you'd see in
textbooks or presentations?


The program(s) you can use will depend in part on the type of illustrations 
you need. One program no one has mentioned yet is Inkscape. I've used it in 
the past to create some simple block diagrams.


--
Cheers!

Kevin.

http://www.ve3syb.ca/   | "Nerds make the shiny things that
https://www.patreon.com/KevinCozens | distract the mouth-breathers, and
| that's why we're powerful"
Owner of Elecraft K2 #2172  |
#include  | --Chris Hardwick
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Re: [GTALUG] Software to draw illustrations?

[Bob Jonkman via talk]

On 2019-02-10 2:51 a.m., Chris F.A. Johnson via talk wrote:
> I use emacs to write PostScript programs and convert them to JPG or 
GIF or PNG with ImageMagick.


I use a horseshoe magnet to manipulate the bits directly on a floppy 
disk, then output them to paper tape on my PDP-8...


--Bob.

(but really, I never considered PS a human-writeable language!)


--
Bob Jonkman   Phone: +1-519-635-9413
SOBAC Microcomputer Services http://sobac.com/sobac/
Software   ---   Office & Business Automation   ---   Consulting
GnuPG Fngrprnt:04F7 742B 8F54 C40A E115 26C2 B912 89B0 D2CC E5EA



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Re: [GTALUG] Software to draw illustrations?

[Howard Gibson via talk]

On Sun, 10 Feb 2019 00:51:09 -0500
William Park via talk  wrote:

> Hi all,
> 
> What software do people use to draw illustrations that you'd see in
> textbooks or presentations?  Eg. data structure, high school math, block
> diagrams, etc.  I mean, I see them, but I don't know how to create them.

William,

   Xfig was designed to work with LaTeX.  The files can be converted to
EPS, PNG, and all sorts of other graphics formats.  The transfig
packages means you can write scripts and Makefiles to do convert FIG
files.

   If you are using LibreCAD, the trick is to print to file.  You get
PDF format.  Select an appropriate scale and sheet size.  There are
lots of sheet sizes to chooser from.  The command pdftops will give you
an EPS file suitable for import into LaTeX or LibreOffice.

   I have not played with LibreOffice's drawing program, or Dia. 

-- 
Howard Gibson 
hgib...@eol.ca
jhowardgib...@gmail.com
http://home.eol.ca/~hgibson
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Re: [GTALUG] Software to draw illustrations?

[Giles Orr via talk]

On Sun, 10 Feb 2019 at 08:37, Christopher Browne via talk 
wrote:

>
> On Sun, Feb 10, 2019, 12:52 AM William Park via talk  wrote:
>
>> Hi all,
>>
>> What software do people use to draw illustrations that you'd see in
>> textbooks or presentations?  Eg. data structure, high school math, block
>> diagrams, etc.  I mean, I see them, but I don't know how to create them.
>>
>
> I almost inevitably head to GraphViz
> https://www.graphviz.org/
>
> That does the layout automatically.
>

Not to call out Chris or graphviz (in fact I use graphviz a fair bit
myself), but like many of the drawing tools mentioned, it has a very
specific domain.  It's excellent for what it does well - a particular type
of graphing - and no good for a huge variety of other kinds of drawings.
My broader point being that what tool you use should depend on what you're
trying to achieve.  The GIMP (which I'm quite familiar with) is a much more
general purpose drawing program.  You can draw graphviz-style graphs in the
GIMP, or you could draw a graph of a quadratic equation in the GIMP.  It is
TERRIBLE for both these things.  But it's able to do it (whereas it would
be essentially impossible in graphviz).

So what are you trying to achieve?  The GIMP is a fantastic general
pixel-based editor (primarily used for photos, but also for drawing).  I
understand Inkscape is excellent in its domain - vector-based drawing (no
good for photos).  Both have a wickedly steep learning curve - but are
worth it if you're going to be doing a wide variety of drawing types in
their domain.  Chances are neither of these is the optimal path for you for
what you're implying would be relatively simplistic drawings (although I'm
guessing based solely on your wording).

So - can you be more specific about the type of drawing(s) you want to
create?  If you have no idea what to call them, or what tool is better or
why, point us to some example images: we (not the royal "we," not
necessarily me, but TLUG) can probably figure it out and point you in the
right direction.

A classic Linux conundrum: there are actually too many ways to achieve the
same end.  And the corollary question is which tool to invest your precious
learning time in ...

-- 
Giles
https://www.gilesorr.com/
giles...@gmail.com
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[GTALUG] Push Pull Cooling 1 year later

[Russell Reiter via talk]

tl;dr
High volume low speed airflow rocks for cooling a home desktop computer.

I just did a mechanical service on the home build I started just before all
the caching issues broke out last year. Overall performance is quite good
but it is the servicability issues which worked out the best.

This was my first water cooling system and I went with push pull cooling
for the radiator.

By far this cooling setup outperformed my expectations. I had really only
expected to reduce the ambient noise when the heat and p/s load issues
would spin up the various cooling fans. Its the secondary effect of passing
the air through the box at a constant low speed which surprised me the
most. Not only is this the quietest home PC Ive ever had, its the cleanest.

Interior environments differ across the board in terms of heat, dust and
humidity but the home environment is the stickiest due to the higher
concetrations of cooking oil particles in the air. We've all seen the
pictures of dust encrusted neglected power supplies and box cooling fans. I
certainly saw enough of them in my time and generally keep a small
assortment of fans around. I had fully expected that after one year I would
have to pull the interor radiator fans for cleaning and swap them to the
exterior and vice versa

I was happily surprised when I opened the unit up completely for a service.
Not only did it appear to have less than typical (for my place) dust
adhesion around fan blades and hubs, the planar surface was almost pristine
with the usual hotspots conspicually absent significant buildup. The fan
for cooling the vidio card was fine and so was the p/s. A few swipes with
99% isopropanol swabs cleaned the fan blades and the interior side of the
radiator. I didn't have to touch the exterior ones. Those fans tended to
blow the settling particles away and they land on the inside of the
exterior grill vent.

Once and a while, if I listen carefully, I can hear the cpu cooling pump or
the video card fan but I actually have to listen for it, instead of being
bothered by it.

All in all I'm quite sure the additional expense at build time for water
cooling and extra indirect ventilation will pay off in the long run. If not
in actual extention of serviceability til EOL but in ease of service.

TODO,s

I have to construct an adapter plate for the exterior radiator fans.
Currently I am using a Canadian Red Green fix as opposed to the tradional
IBM blue wire fix. ie. One screw and a couple of strips of duct tape hold
the pull fans to the frame.

The optical audio cable doesnt seat properly. I think the tiny flap on the
mb connection side has some dangling chad dross I have to take care of.

All in all a fun robust build with better than expected results considering
all the meltdown suff that started just after I comitted to this particular
form.
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Re: [GTALUG] Software to draw illustrations?

[Christopher Browne via talk]

On Sun, Feb 10, 2019, 12:52 AM William Park via talk  Hi all,
>
> What software do people use to draw illustrations that you'd see in
> textbooks or presentations?  Eg. data structure, high school math, block
> diagrams, etc.  I mean, I see them, but I don't know how to create them.
>

I almost inevitably head to GraphViz
https://www.graphviz.org/

That does the layout automatically.

>
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Re: [GTALUG] Software to draw illustrations?

[Russell Reiter via talk]

The Open Office set (Writer, Draw, Calc etc.) can get you started with WSYG
pages quite nicely. Tex & Latex were traditionally used to mark up math
notation and other txt ligature styles for printing and are well
documented. There are also a number of specialzed diagramatic tools for
scientific venn-euler formats like Mattlab and Dia.

GIMP is the mainstay swiss army knife of image compositors. However it
comes with a high learning curve and the ability to assemble massive
documents and transmogrify them into all sorts of formats.

On Sun, Feb 10, 2019, 12:51 AM William Park via talk  Hi all,
>
> What software do people use to draw illustrations that you'd see in
> textbooks or presentations?  Eg. data structure, high school math, block
> diagrams, etc.  I mean, I see them, but I don't know how to create them.
> --
> William Park 
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Re: [GTALUG] Software to draw illustrations?

[David Collier-Brown via talk]

For simple stuff, open office draw suffices. --dave


On 2019-02-10 2:51 a.m., Chris F.A. Johnson via talk wrote:

On Sun, 10 Feb 2019, William Park via talk wrote:


Hi all,

What software do people use to draw illustrations that you'd see in
textbooks or presentations?  Eg. data structure, high school math, block
diagrams, etc.  I mean, I see them, but I don't know how to create them.


I use emacs to write PostScript programs and convert them to JPG or 
GIF or PNG with ImageMagick.


But you might be more comfortable with GIMP.

There are also several other paint programs, such as gpaint, xpaint, 
rgbpaint.

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Re: [GTALUG] Software to draw illustrations?

[Dave Collier-Brown via talk]

For simple stuff, open office draw suffices. --dave


On 2019-02-10 2:51 a.m., Chris F.A. Johnson via talk wrote:
On Sun, 10 Feb 2019, William Park via talk wrote:

Hi all,

What software do people use to draw illustrations that you'd see in
textbooks or presentations?  Eg. data structure, high school math, block
diagrams, etc.  I mean, I see them, but I don't know how to create them.

I use emacs to write PostScript programs and convert them to JPG or GIF or PNG 
with ImageMagick.

But you might be more comfortable with GIMP.

There are also several other paint programs, such as gpaint, xpaint, rgbpaint.
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David Collier-Brown, | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
dave.collier-br...@indexexchange.com
 |  -- Mark Twain



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