Anyone interested in electronics?

The global Internet is chock full of avocational electronic sites
with plenty of amazing projects by both amateurs and professional
alike.

Of course, GNU/Linux has the all the tools for pro-grade electronic
work. For example, check out ngspice:

https://ngspice.sourceforge.io/

Ngspice is superbly accurate, and will rival any commercial ($$$$)
software.

Consider the following coupled oscillator circuit:

https://i.postimg.cc/RCY0Zgnf/cpl-osc.png

By the way, this image was made with GNU/Linux xcircuit:

http://opencircuitdesign.com/xcircuit/

Ngspice can simulate the behavior of this circuit flawlessly,
and will probably beat any commercial ($$$$) software. Here
is the ngspice script:

Coupled Oscillators
R1 1 0 0.1
L1 1 2 10
C1 2 0 0.0001
CK 2 3 0.00001
C2 3 0 0.00011
L2 3 4 10.2
R2 4 0 0.1
* * The .IC line allows an initial voltage to be set on the inductor
* to establish an initial dI/dt through loop 1
* This cannot be done by specifying an initial condition on the inductor itself
* Now the simulation gives the same result as the exact differential eqn
* ..IC V(2)=-1
..tran 0.001 5 0 0.00001 UIC
..end

I have compared the output of ngspice with the exact solution
of the differential equation system and to 16-digit double precision
there is ABSOLUTELY NO FUCKING DIFFERENCE.

A lot of avocational electronic enthusiasts, both amateur and professional,
do use GNU/Linux, but to those that don't here is the message:

Fuck that goddamned commercial ($$$$) crap. Use GNU/Linux and
shut the fuck up.

Ha, ha, ha, ha, ha, ha, ha, ha, ha, ha, ha, ha, ha!

Xavier Dominica

Master of Science in Electrical Engineering

--
Systemd: solving all the problems that you never knew you had.

Le 13-10-2024, Xavier Dominica <XD@gnulinux.rocks> a écrit :
>
> Master of Science in Electrical Engineering

The main issue with that is: the day you'll win a Darwin award, we'll
never hear about it.

When you mess to much with your computer, you can come here to blame the
all universe. It's funny to see. But playing with electricity without
understanding the basic can be harmful. Really. It's not a fun way to
pass away.

--
Si vous avez du temps à perdre :
https://scarpet42.gitlab.io

On 13 Oct 2024 18:19:31 GMT, Stéphane CARPENTIER wrote:

> But playing with electricity without
> understanding the basic can be harmful. Really. It's not a fun way to
> pass away.
>

That only applies to high voltage electricity.

You are correct. (But that's only fortuitous because you
are an ignoramus idiot.)

High voltage is nasty stuff and although lots of amateurs
will safely play with it I have no need to do so.

I build audio processing circuits and amplifiers that rival
or exceed any commercial products on the market.

Furthermore, I use GNU/Linux tools throughout.

My audio stuff is the BEST in the universe.

Xavier Dominica <XD@gnulinux.rocks> wrote:
>On 13 Oct 2024 18:19:31 GMT, Stéphane CARPENTIER wrote:
>
>> But playing with electricity without
>> understanding the basic can be harmful. Really. It's not a fun way to
>> pass away.
>
>That only applies to high voltage electricity.
>
>You are correct. (But that's only fortuitous because you
>are an ignoramus idiot.)
>
>High voltage is nasty stuff and although lots of amateurs
>will safely play with it I have no need to do so.
>
>I build audio processing circuits and amplifiers that rival
>or exceed any commercial products on the market.
>
>Furthermore, I use GNU/Linux tools throughout.
>
>My audio stuff is the BEST in the universe.

Can I buy a bridge from you? You make me laugh, implying you could
manufacture a sound card, give me a break, Larry, you're retarded. My
Gigabyte motherboard's Realtek audio chips give me DVD-A-gear quality,
without needing a whole setup, just feed cheap speakers with a
headphone jack, and voila, high definition sound, conveniently and
affordably.

--
Joel W. Crump

Amendment XIV
Section 1.

[...] No state shall make or enforce any law which shall
abridge the privileges or immunities of citizens of the
United States; nor shall any state deprive any person of
life, liberty, or property, without due process of law;
nor deny to any person within its jurisdiction the equal
protection of the laws.

Dobbs rewrites this, it is invalid precedent. States are
liable for denying needed abortions, e.g. TX.

On 10/13/24 3:19 PM, Xavier Dominica wrote:
> On 13 Oct 2024 18:19:31 GMT, Stéphane CARPENTIER wrote:
>
>
>> But playing with electricity without
>> understanding the basic can be harmful. Really. It's not a fun way to
>> pass away.
>>
>
> That only applies to high voltage electricity.

Incorrect. High voltage hurts ... but it is amperage which kills.

It merely takes carelessness to kill yourself with high voltage, but if
you know what you're doing, you can kill yourself with a 1.5V D cell
battery too.

-hh

On 10/13/24 5:22 PM, -hh wrote:
> On 10/13/24 3:19 PM, Xavier Dominica wrote:
>> On 13 Oct 2024 18:19:31 GMT, Stéphane CARPENTIER wrote:
>>
>>
>>> But playing with electricity without
>>> understanding the basic can be harmful. Really. It's not a fun way to
>>> pass away.
>>>
>>
>> That only applies to high voltage electricity.
>
> Incorrect.  High voltage hurts ... but it is amperage which kills.
>
> It merely takes carelessness to kill yourself with high voltage, but if
> you know what you're doing, you can kill yourself with a 1.5V D cell
> battery too.
>
>
> -hh

You must be a fucking firecracker at cocktail parties. Sheesh, what a
fucking bore. I'll bet you still use a pocket protector.

--
Luke

On Sun, 13 Oct 2024 17:22:08 -0400, -hh wrote:

>
> Incorrect. High voltage hurts ... but it is amperage which kills.
>

Current (i.e. the flow of charge or amperage) does not occur
unless something is pushing it and that something is voltage.

Man-made sources of high voltage are usually associated with
the capacity to produce large currents and hence high voltage
is quite dangerous.

Rubbing ones shoes on a carpet can charge the human body
to a million volts but the resulting current discharge (i.e.
the spark from ones finger) is very small and hence harmless.

Current is the flow of charge but voltage is the energy
per charge.

>
> It merely takes carelessness to kill yourself with high voltage, but if
> you know what you're doing, you can kill yourself with a 1.5V D cell
> battery too.
>

It's not possible, unless you were to cut open your chest
and apply the terminals directly to the heart. But even
then the voltage may be too small.

On Sun, 13 Oct 2024 17:22:08 -0400, -hh wrote:

>>
>> That only applies to high voltage electricity.
>
> Incorrect. High voltage hurts ... but it is amperage which kills.
>

I need to add a bit more info to further destroy your ridiculous
statement.

Perhaps we need to first define "high voltage," and the accepted
definition is voltage that exceeds 1 kV. Thus, all household (110/220)
and industrial (480) sources are excluded.

The major problem with HV is that a direct contact with the voltage
source is not necessary for a lethal current to pass through the
body.

Any HV source will establish an electric field throughout the
local environment. A living human can be standing 5 meters
from an HV source but if he is sufficiently grounded the current
will "jump" to him in the manner of a lightning bolt.

As I indicated, HV is nasty stuff. Some amateurs will experiment
with HV. I would never do so.

On 10/14/24 3:44 AM, Xavier Dominica wrote:
> On Sun, 13 Oct 2024 17:22:08 -0400, -hh wrote:
>
>>
>> Incorrect. High voltage hurts ... but it is amperage which kills.
>>
>
> Current (i.e. the flow of charge or amperage) does not occur
> unless something is pushing it and that something is voltage.

Good thing then that I specified a voltage on my comment.

> Man-made sources of high voltage are usually associated with
> the capacity to produce large currents and hence high voltage
> is quite dangerous.
>
> Rubbing ones shoes on a carpet can charge the human body
> to a million volts but the resulting current discharge (i.e.
> the spark from ones finger) is very small and hence harmless.
>
> Current is the flow of charge but voltage is the energy
> per charge.
>
>>
>> It merely takes carelessness to kill yourself with high voltage, but if
>> you know what you're doing, you can kill yourself with a 1.5V D cell
>> battery too.
>>
>
> It's not possible, unless you were to cut open your chest
> and apply the terminals directly to the heart. But even
> then the voltage may be too small.
>

That would work too, but that's not the only solution.

-hh

On 10/14/24 2:50 PM, Xavier Dominica wrote:
> On Sun, 13 Oct 2024 17:22:08 -0400, -hh wrote:
>
>>>
>>> That only applies to high voltage electricity.
>>
>> Incorrect. High voltage hurts ... but it is amperage which kills.
>>
>
> I need to add a bit more info to further destroy your ridiculous
> statement.
>
> Perhaps we need to first define "high voltage," and the accepted
> definition is voltage that exceeds 1 kV. Thus, all household (110/220)
> and industrial (480) sources are excluded.

Depends on the industry and which set of standards. OSHA has one
standard at 600V, but for others, even 240VAC household can be
considered hazardous and requiring PPE/etc. Yes, this does cause
confusion with "homeowner" centric practices.

> The major problem with HV is that a direct contact with the voltage
> source is not necessary for a lethal current to pass through the
> body.

Safety policies start at values much lower than "lethal". Overall, it
sounds like you've never personally have gotten zapped with even mere
120VAC to understand this.

> Any HV source will establish an electric field throughout the
> local environment. A living human can be standing 5 meters
> from an HV source but if he is sufficiently grounded the current
> will "jump" to him in the manner of a lightning bolt.

Depends on a lot of factors on propagation. General rule of thumb for
dry stationary air conditions is 10kV/inch, so a 5m arc should require
2000kV. But there's a lot of ways to make that lower.

> As I indicated, HV is nasty stuff. Some amateurs will experiment
> with HV. I would never do so.

Well, I could invite you to stop by the lab at work, to see if you can
withstand 3 seconds of ~3kV/m RF RMS: guaranteed to not turn you to ash.

-hh

On Mon, 14 Oct 2024 16:52:03 -0400, -hh wrote:

>
> Well, I could invite you to stop by the lab at work, to see if you can
> withstand 3 seconds of ~3kV/m RF RMS: guaranteed to not turn you to ash.
>

No way.

High voltage and the associated E fields are known to induce brain cancer.

High voltage workers have a much higher incidence of brain cancer than
the general population.

On 10/13/2024 3:19 PM, Ludicrous Larry Pietraskiewicz wrote:

> My audio stuff is the BEST in the universe.

You do have some of the best delusions and lies in the universe.

"_I_ am the pinnacle of intellectual and physical perfection."

"I know EVERYTHING."

"I am heavily involved in virtually ALL AREAS of contemporary computing"

"The stuff I do on my GNU/Linux machine is on par with the cutting edge
in HPC."

"_I_ am a REAL MAN PROGRAMMER"

DFS <nospam@dfs.com> wrote:

>"I [Larry] am heavily involved in virtually ALL AREAS of contemporary computing"

Heh, except for even having a real Web browser. ;)

--
Joel W. Crump

Amendment XIV
Section 1.

[...] No state shall make or enforce any law which shall
abridge the privileges or immunities of citizens of the
United States; nor shall any state deprive any person of
life, liberty, or property, without due process of law;
nor deny to any person within its jurisdiction the equal
protection of the laws.

Dobbs rewrites this, it is invalid precedent. States are
liable for denying needed abortions, e.g. TX.

On 10/15/24 4:37 AM, Xavier Dominica wrote:
> On Mon, 14 Oct 2024 16:52:03 -0400, -hh wrote:
>
>>
>> Well, I could invite you to stop by the lab at work, to see if you can
>> withstand 3 seconds of ~3kV/m RF RMS: guaranteed to not turn you to ash.
>>
>
> No way.

LOL, just goes to show you what you don't know.

> High voltage and the associated E fields are known to induce brain cancer.

There's been over 10,000 exposures of the above, in an HSR context and
zero cancers have been detected. Plus there's zero theoretical reason
in this context to even be concerned of them.

> High voltage workers have a much higher incidence of brain cancer than
> the general population.
>

Depends on the voltage source. You're stuck waaaay inside your box.

-hh

Le 13-10-2024, Xavier Dominica <XD@gnulinux.rocks> a écrit :
> On 13 Oct 2024 18:19:31 GMT, Stéphane CARPENTIER wrote:
>
>> But playing with electricity without
>> understanding the basic can be harmful. Really. It's not a fun way to
>> pass away.
>
> That only applies to high voltage electricity.

That can apply to anything you dare to touch.

--
Si vous avez du temps à perdre :
https://scarpet42.gitlab.io

Le 15-10-2024, Xavier Dominica <XD@gnulinux.rocks> a écrit :
>
> are known to induce brain cancer.

If it worries you, it shouldn't. If something can't happen to you, it's
something related with a brain you don't have.

--
Si vous avez du temps à perdre :
https://scarpet42.gitlab.io