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Need a calculator that knows about coulombs

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  Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 02:20 +0100
    Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 02:40 +0100
    Re: Need a calculator that knows about coulombs Jimmy Johnson <jimmyjhn@gmail.com> - 2015-12-23 02:40 +0100
      Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 02:50 +0100
        Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-23 03:10 +0100
          Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 11:10 +0100
            Re: Need a calculator that knows about coulombs Joe <joe@jretrading.com> - 2015-12-23 12:50 +0100
              Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 16:10 +0100
            Re: Need a calculator that knows about coulombs David Christensen <dpchrist@holgerdanske.com> - 2015-12-23 19:30 +0100
              Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-23 20:10 +0100
              Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 20:20 +0100
                Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-23 20:40 +0100
                  Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 22:20 +0100
                    Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-24 01:30 +0100
                      Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-24 02:40 +0100
                  Re: Need a calculator that knows about coulombs Bob Bernstein <poobah@ruptured-duck.com> - 2015-12-24 02:10 +0100
                    Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-24 02:40 +0100
                      Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-24 03:00 +0100
                        Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-24 03:20 +0100
                          Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-24 04:50 +0100
                    Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-24 02:50 +0100
                      Re: Need a calculator that knows about coulombs Bob Bernstein <poobah@ruptured-duck.com> - 2015-12-24 03:10 +0100
                        Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-24 04:40 +0100
                    Re: Need a calculator that knows about coulombs Lisi Reisz <lisi.reisz@gmail.com> - 2015-12-24 12:30 +0100
                      Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-24 16:40 +0100
          Re: Need a calculator that knows about coulombs Gary Roach <gary719_list1@verizon.net> - 2015-12-24 01:00 +0100
            Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-24 01:40 +0100
              Re: Need a calculator that knows about coulombs Anders Andersson <pipatron@gmail.com> - 2015-12-24 01:40 +0100
            Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-24 02:40 +0100
        Re: Need a calculator that knows about coulombs David Christensen <dpchrist@holgerdanske.com> - 2015-12-23 03:20 +0100
          Re: Need a calculator that knows about coulombs Bob Bernstein <poobah@ruptured-duck.com> - 2015-12-23 04:40 +0100
            Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 11:50 +0100
          Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 11:40 +0100
            Re: Need a calculator that knows about coulombs David Christensen <dpchrist@holgerdanske.com> - 2015-12-23 19:40 +0100
    Re: Need a calculator that knows about coulombs rlharris@oplink.net - 2015-12-23 02:40 +0100
    Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-23 03:00 +0100
      Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 11:40 +0100
    Re: Need a calculator that knows about coulombs Charlie Kravetz <cjk@teamcharliesangels.com> - 2015-12-23 04:50 +0100
    Re: Need a calculator that knows about coulombs Jörg-Volker Peetz <jvpeetz@web.de> - 2015-12-23 15:00 +0100
      Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-23 16:20 +0100
        Re: Need a calculator that knows about coulombs Jörg-Volker Peetz <jvpeetz@web.de> - 2015-12-28 10:40 +0100
          Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-28 14:00 +0100
            Re: Need a calculator that knows about coulombs John Hasler <jhasler@newsguy.com> - 2015-12-28 18:40 +0100
              Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-28 21:00 +0100
    Re: Need a calculator that knows about coulombs Gener Badenas <gener.ong.badenas@gmail.com> - 2015-12-28 08:10 +0100
      Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-28 13:20 +0100
        Re: Need a calculator that knows about coulombs Joel Rees <joel.rees@gmail.com> - 2015-12-29 09:40 +0100
          Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-29 10:50 +0100
        Re: Need a calculator that knows about coulombs Joel Rees <joel.rees@gmail.com> - 2015-12-29 12:00 +0100
          Re: Need a calculator that knows about coulombs Joel Rees <joel.rees@gmail.com> - 2015-12-29 12:10 +0100
            Re: Need a calculator that knows about coulombs Gene Heskett <gheskett@shentel.net> - 2015-12-29 16:50 +0100
      Re: Need a calculator that knows about coulombs ken <gebser@mousecar.com> - 2016-01-03 12:00 +0100

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#162076

On Wednesday 23 December 2015 20:05:14 Bob Bernstein wrote:

> On Wed, 23 Dec 2015, John Hasler wrote:
> > John "Permits?  We don't need no stinkin permits." Hasler
>
> Reminds me of "Don't RTFM! Wing that sucker!"
>
> Haven't heard/seen that in a long time.
>
> And I have to say, this electrical stuff is a lot sexier than
> poopy linux stuff!

Try telling that to a couple school bus-loads of 7nth graders.  They 
thought that was the best standup comedy they'd heard in ages.  Its no 
wonder that people like me get accused of walking on water, we are a 
dying breed.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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#162078

On Wed, 23 Dec 2015, Gene Heskett wrote:

> Try telling that to a couple school bus-loads of 7nth graders.

I am struggling to understand what possible, unholy, 
agglomeration of powers and principalities might ever induce me 
even to get that close to a couple of 'em! I'll take a pass on 
that if it's okay with _everyone_ around here.

> Its no wonder that people like me get accused of walking on 
> water, we are a dying breed.

d00D! You nailed it! <g>

-- 
Bob Bernstein

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#162081

On Wednesday 23 December 2015 21:07:34 Bob Bernstein wrote:

> On Wed, 23 Dec 2015, Gene Heskett wrote:
> > Try telling that to a couple school bus-loads of 7nth graders.
>
> I am struggling to understand what possible, unholy,
> agglomeration of powers and principalities might ever induce me
> even to get that close to a couple of 'em! I'll take a pass on
> that if it's okay with _everyone_ around here.
>
Amazingly, they actually paid a reasonable level of attention as I was 
giving them a synopsis of how television actually worked, in words they 
should understand.  It wasn't until I made the statement that I was 
fairly well paid, and by the time I am ready to retire, I'll have some 
input into choosing my replacement, and it would be nice to have a few 
of them in the stack of resumes on my desk, nipping at my heels to get 
such a job.  The news studio we were in exploded.  I asked why, and one 
boy, apparently accustomed to being the class clown, said "who in his 
right mind, would want such a job?" I replied, just loud enough he heard 
me, "you, if you can muster the IQ it takes, but you just demoed that 
you don't". 65 kids were holding their breath for the next few seconds 
but he had no reparte to that.

I came away with a lot less respect for the generation that will, or is, 
now running the show.

> > Its no wonder that people like me get accused of walking on
> > water, we are a dying breed.
>
> d00D! You nailed it! <g>
 
I'd like to think so.  My youngest, now north of 30, introduced me to the 
rest of the gang in his place of work, including his employer, by 
stating that "in any building I was in, my dad is the smartest one in 
the building."  He's obviously easily impressed.  And despite that it 
has happened in similar words before, it took me by total surprise.

How many others here can claim to have wired the house his father was 
building in 1946, at the age of 12.  How many others can claim that the 
tv cameras on the Trieste, when it went down into the mohole in Feburary 
1960, 37000 feet deep in the pacific, had their finger prints on the 
pcb's in it?  Its a pretty exclusive club and I would recognize most of 
the names yet.  Or tested the fuel pressure regulators for the original 
rocket (Atlas?) that gave John Glenn his first ride to the edge of 
space?

There has been quite a list of BTDT's over the last 67 years while trying 
to earn a living, not all of which were so "romantic", but you do what 
you have to do to keep groceries in the house & the utilitis turned on.

I guess that is one of the trade marks of a "doer".  And I'm 
still 'doing'.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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#162086

On Thursday 24 December 2015 01:05:14 Bob Bernstein wrote:
> And I have to say, this electrical stuff is a lot sexier than
> poopy linux stuff!

<ahem> ****debian****-user@lists.debian.org ;-)

More _macho_ perhaps (my landlady got the neighbours out to see when I changed 
a fuse when I was 23 - definitely a job for the boys and what was a slip of a 
girl doing doing it).  But _sexy_?  Nah!  You fool yourselves if you think 
macho=sexy. ;-)

Lisi

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#162096

On Thursday 24 December 2015 06:27:44 Lisi Reisz wrote:

> On Thursday 24 December 2015 01:05:14 Bob Bernstein wrote:
> > And I have to say, this electrical stuff is a lot sexier than
> > poopy linux stuff!
>
> <ahem> ****debian****-user@lists.debian.org ;-)
>
> More _macho_ perhaps (my landlady got the neighbours out to see when I
> changed a fuse when I was 23 - definitely a job for the boys and what
> was a slip of a girl doing doing it).  But _sexy_?  Nah!  You fool
> yourselves if you think macho=sexy. ;-)
>
> Lisi

I think I have to agree with Lisi.  Being the neighborhood geek 20 years 
before the term was invented, sure made the girls hard to get. That 
resulted in a certain event in my life being several years late.

When I found, or vice versa, my first wife, a divorc`e with 2 kids, I 
thought I was set for life. That unfortunately only lasted 9 years, she 
had a stroke, blood clot in the left middle cerebral and she was right 
handed, and died at 34. Buried on our oldest daughters 9nth birthday. I 
had cake & ice cream but there was no merriment to celebrate that day.

But what a glorious 9 years. Officially about a 3rd grade education 
because northern Arkansas kids are needed in the cotton fields to work 
at the same time school is in session. But she was smart, the oldest of 
13, and was learning semiconductor theory from me at a good pace when 
the stroke occurred.  A good woman, and I miss her yet nearly half a 
century later.  She had enthusiastically gave me 3 children, 2 girls and 
a boy, but cancer took the girls and a Kia sedan mixed with a 5th took 
the boy just a year ago. So none of my first family now survive.  A man 
isn't supposed to outlive his kids, but I seem to have done it.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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#162066

On 12/22/2015 06:02 PM, John Hasler wrote:
> Gene Heskett writes:
>> In this case, the size of a capacitor hooked to a square wave source,
>> and I want to know how much charge is transfered for every full cycle
>> of the input square wave.
> Zero assuming linear source and load impedence.
And assuming the square wave is symetrical about zero. If I recall Q=CV 
where C is in farads, V in volts and Q is in coulombs. With R (circuit 
resistance) = zero. The Voltage on C will instantly be the supply 
voltage an Q=CV applies. In short, it is a steady state problem. If R is 
not zero then there is a charging time constant involved. But if the on 
period of the square wave is at least 5 times the time constant of the 
circuit, it's still a steady state problem. As I recall the TC = RC 
seconds. If the period of the wave is less than 5 times the TC then 
things get more complicated. Look up time constant in wikipedia will 
probably give you the answer. In any event, any scientific calculator 
will do the job.

Gary R.

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#162068

Gary Roach writes:
> And assuming the square wave is symetrical about zero.

The steady-state net charge transferred per cycle will be zero
regardless of waveform.  It's a capacitor.  No DC component.
-- 
John Hasler 
jhasler@newsguy.com
Elmwood, WI USA

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#162069

http://electronics.stackexchange.com/

Hope this helps.

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#162075

On Wednesday 23 December 2015 17:57:02 Gary Roach wrote:

> On 12/22/2015 06:02 PM, John Hasler wrote:
> > Gene Heskett writes:
> >> In this case, the size of a capacitor hooked to a square wave
> >> source, and I want to know how much charge is transfered for every
> >> full cycle of the input square wave.
> >
> > Zero assuming linear source and load impedence.
>
> And assuming the square wave is symetrical about zero.

plus or minus, at random, but  within 10 u-secs of 50%.

> If I recall 
> Q=CV where C is in farads, V in volts and Q is in coulombs. With R
> (circuit resistance) = zero. The Voltage on C will instantly be the
> supply voltage an Q=CV applies. In short, it is a steady state
> problem. If R is not zero then there is a charging time constant
> involved.

> But if the on period of the square wave is at least 5 times 
> the time constant of the circuit, it's still a steady state problem.

> As I recall the TC = RC seconds. If the period of the wave is less
> than 5 times the TC then things get more complicated. Look up time
> constant in wikipedia will probably give you the answer. In any event,
> any scientific calculator will do the job.

I was hoping to get that sort of an answer, but my button pushing on a 
TI-30X||S very rapidly degenerates into answers that are a factor of at 
least 100 million from something useful.  Sure t=rc, where c is in 
farads and t is in seconds, but r in this case, in series with the 
square wave input and Cp is an unknown.

I now have a test wire on the BoB that I was using to watch the signal 
come and go on queue with a Ds101 pocket scope, essentially proving 
my .hal chain of command works, but that was as far as I got today, I'd 
found some 2000 grit wet-r-dry and seeing how that works to level up an 
air brush laid but spotty finish on some poor mahogany, and busy putting 
drops in the XYL's eyes breaks my chain of thought.  She's had cataract 
operations on both eyes in the last 10 days.  First one is working 
great, but the jury is still out on the 2nd one yet.

> Gary R.


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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#162019

On 12/22/2015 05:43 PM, Gene Heskett wrote:
> ... the size of a capacitor hooked to a square wave source, and I
> want to know how much charge is transfered for every full cycle of
> the input square wave.

Use a DC current probe, use a digital sampling oscilloscope, and perform 
a numerical integration according to the third equation presented on the 
Wikipedia "Electric charge" page:

 
https://en.wikipedia.org/wiki/Electric_charge#Conservation_of_electric_charge


David

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#162021

http://www.wolframalpha.com is fun.

-- 
Bob Bernstein

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#162030

On Tuesday 22 December 2015 22:33:53 Bob Bernstein wrote:

> http://www.wolframalpha.com is fun.

Looks like it, thanks Bob.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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#162027

On Tuesday 22 December 2015 21:17:47 David Christensen wrote:

> On 12/22/2015 05:43 PM, Gene Heskett wrote:
> > ... the size of a capacitor hooked to a square wave source, and I
> > want to know how much charge is transfered for every full cycle of
> > the input square wave.
>
> Use a DC current probe,

Don't have one of them critters. Lots of bucks for a good one.

> use a digital sampling oscilloscope,

Do have that, 2 channel gigasampler

> and  
> perform a numerical integration according to the third equation
> presented on the Wikipedia "Electric charge" page:
>
>
> https://en.wikipedia.org/wiki/Electric_charge#Conservation_of_electric
>_charge

I'll look that up, thanks David.
>
> David


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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#162054

On 12/23/2015 02:39 AM, Gene Heskett wrote:
> Don't have [DC current probe].  Lots of bucks for a good one.
...
> Do have [digital sampling oscilloscope], 2 channel gigasampler

How about using a current shunt, and measuring millivolts?


> I'll look [up Electric charge on Wikipedia], thanks David.

YW.


David

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#162014

On Tue, December 22, 2015 7:09 pm, Gene Heskett wrote:
> Re: Need a calculator that knows about coulombs

Look for "Weber" as well as for "Coulumb".

Russ

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#162016

Units may be what you want:

You have: (.007 coulomb)/(119 volt)
You want: farad
        * 5.8823529e-05
        / 17000
You have: (14 ampere)*(2.3 second)
You want: coulomb
        * 32.2
        / 0.031055901




-- 
John Hasler 
jhasler@newsguy.com
Elmwood, WI USA

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#162028

On Tuesday 22 December 2015 20:52:59 John Hasler wrote:

> Units may be what you want:
>
> You have: (.007 coulomb)/(119 volt)
> You want: farad
>         * 5.8823529e-05
>         / 17000
> You have: (14 ampere)*(2.3 second)
> You want: coulomb
>         * 32.2
>         / 0.031055901

Installed it.  Now I need to teach myself how to use it.  I have to plead 
lack of formal education on the subject, I have only spent the last 65+ 
years doing electronic magic, generally making other folks designs work 
again, or if I have to put the smoke back in after the mirror broke the 
third time, redesign it for much stronger mirrors.

All on an 8th grade education and the ability to read phonetically. Its 
been quite a ride so far, but I had a pulmonary embolism a year ago last 
May that almost punched my ticket and which may have slowed me down. I 
hope I can manage to learn this too.

Thanks John.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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#162022

On Tue, 22 Dec 2015 20:09:55 -0500
Gene Heskett <gheskett@shentel.net> wrote:

>Greetings all;
>
>Do we have such a beast?
>
>Thanks.
>
>Cheers, Gene Heskett

I honestly do not know the answer, but speedcrunch is a neat calculator
with many features. Online docs suck, but the readme is pretty good.

-- 
Charlie Kravetz
Linux Registered User Number 425914
[http://linuxcounter.net/user/425914.html]
Never let anyone steal your DREAM.   [http://keepingdreams.com]

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#162040

Maybe you find something among the software listed here:

Wikipedia:WikiProject Electronics/Programs - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Electronics/Programs

e.g., Qucs https://en.wikipedia.org/wiki/Quite_Universal_Circuit_Simulator

Regards,
jvp.

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#162046

On Wednesday 23 December 2015 08:49:34 Jörg-Volker Peetz wrote:

> Maybe you find something among the software listed here:
>
> Wikipedia:WikiProject Electronics/Programs - Wikipedia, the free
> encyclopedia
> https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Electronics/Progra
>ms
>
> e.g., Qucs
> https://en.wikipedia.org/wiki/Quite_Universal_Circuit_Simulator
>
> Regards,
> jvp.

Sounds like exactly what might be useful here. But no qucs exists in the 
wheezy repos. Dowloaded src, will see if it will build on wheezy.

Thank you Jörg-Volker Peetz.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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