Re: Need a calculator that knows about coulombs

On 12/28/2015 01:59 AM, Gener Badenas wrote: On Wed, Dec 23, 2015 at 9:09 AM, Gene Heskett > wrote: Greetings all; Do we have such a beast? Thanks. A quasi-cli utility called "units" does that.

Re: Need a calculator that knows about coulombs

On Tuesday 29 December 2015 06:03:14 Joel Rees wrote: > I don't believe I did this. > > On Tue, Dec 29, 2015 at 7:56 PM, Joel Rees wrote: > > On Tue, Dec 29, 2015 at 6:12 PM, Gene Heskett wrote: > >> A paste of what I entered: > >> > >> define

Re: Need a calculator that knows about coulombs

erk. On Tue, Dec 29, 2015 at 5:12 PM, Joel Rees wrote: > On Mon, Dec 28, 2015 at 9:15 PM, Gene Heskett wrote: >> On Monday 28 December 2015 01:59:44 Gener Badenas wrote: >> >> Back on the list where this belongs. >> >>> On Wed, Dec 23, 2015 at 9:09 AM,

Re: Need a calculator that knows about coulombs

On Tuesday 29 December 2015 03:39:25 Joel Rees wrote: > erk. > > On Tue, Dec 29, 2015 at 5:12 PM, Joel Rees wrote: > > On Mon, Dec 28, 2015 at 9:15 PM, Gene Heskett wrote: > >> On Monday 28 December 2015 01:59:44 Gener Badenas wrote: > >> > >> Back on

Re: Need a calculator that knows about coulombs

On Tue, Dec 29, 2015 at 6:12 PM, Gene Heskett wrote: > > A paste of what I entered: > > define vc(vs,t,r,c) { > return vs * (1-e(-t/(r*c))) > } > for ( i=0.0; i<5.0; i += 0.1 ) { print i, ":", vc(120,i,83,.01 ),"\n" } 0:0 Sorry I missed that. Probably should stay off the

Re: Need a calculator that knows about coulombs

I don't believe I did this. On Tue, Dec 29, 2015 at 7:56 PM, Joel Rees wrote: > On Tue, Dec 29, 2015 at 6:12 PM, Gene Heskett wrote: >> >> A paste of what I entered: >> >> define vc(vs,t,r,c) { >> return vs * (1-e(-t/(r*c))) >> } >> for ( i=0.0; i<5.0;

Re: Need a calculator that knows about coulombs

Gene Heskett wrote on 12/23/15 16:12: > On Wednesday 23 December 2015 08:49:34 Jörg-Volker Peetz wrote: > >> 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

Re: Need a calculator that knows about coulombs

On Monday 28 December 2015 01:59:44 Gener Badenas wrote: Back on the list where this belongs. > On Wed, Dec 23, 2015 at 9:09 AM, Gene Heskett wrote: > > Greetings all; > > > > Do we have such a beast? > > > > Thanks. > > There might be some projects in github that does

Re: Need a calculator that knows about coulombs

On Monday 28 December 2015 04:30:06 Jörg-Volker Peetz wrote: > Gene Heskett wrote on 12/23/15 16:12: > > On Wednesday 23 December 2015 08:49:34 Jörg-Volker Peetz wrote: > >> e.g., Qucs > >> https://en.wikipedia.org/wiki/Quite_Universal_Circuit_Simulator > >> > >> Regards, > >> jvp. > > > > Sounds

Re: Need a calculator that knows about coulombs

Gene writes: > And I haven't carved up a pcb to hold it all yet either. I never do pcbs for this sort of thing. I just solder point to point on a breadboard. Printed circuit boards are for production. > The qucs simulation is hampered by its lack of two part models, a decent > hexfet, and a

Re: Need a calculator that knows about coulombs

On Monday 28 December 2015 12:35:01 John Hasler wrote: > Gene writes: > > And I haven't carved up a pcb to hold it all yet either. > > I never do pcbs for this sort of thing. I just solder point to point > on a breadboard. Printed circuit boards are for production. Which, since I was in the

Re: Need a calculator that knows about coulombs

On Wed, Dec 23, 2015 at 9:09 AM, Gene Heskett wrote: > Greetings all; > > Do we have such a beast? > > Thanks. > > There might be some projects in github that does this. > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot,

Re: Need a calculator that knows about coulombs

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! debian-u...@lists.debian.org ;-) More _macho_ perhaps (my landlady got the neighbours out to see when I changed a fuse when I was 23 -

Re: Need a calculator that knows about coulombs

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! > > debian-u...@lists.debian.org ;-) > > More _macho_ perhaps (my landlady got the

Re: Need a calculator that knows about coulombs

On Tuesday 22 December 2015 21:02:31 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

Re: Need a calculator that knows about coulombs

On Wed, 23 Dec 2015 05:09:18 -0500 Gene Heskett wrote: > On Tuesday 22 December 2015 21:02:31 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

Re: Need a calculator that knows about coulombs

On Wednesday 23 December 2015 06:47:39 Joe wrote: > On Wed, 23 Dec 2015 05:09:18 -0500 > > Gene Heskett wrote: > > On Tuesday 22 December 2015 21:02:31 John Hasler wrote: > > > Gene Heskett writes: > > > > In this case, the size of a capacitor hooked to a square wave > > >

Re: Need a calculator that knows about coulombs

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,

Re: Need a calculator that knows about coulombs

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.,

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

David writes: > So, you want to connect a 120 VAC, 30 A CNC milling machine and a 120 > VAC, unknown current vacuum cleaner to a single 120 V 15 A branch > circuit. No. He wants to power a 16A mill. His problem is high inrush on startup of a DC supply. Soft-start is a reasonable way to solve

Re: Need a calculator that knows about coulombs

On Wednesday 23 December 2015 13:22:14 David Christensen wrote: > On 12/23/2015 02:09 AM, Gene Heskett wrote: > > Ahh, but its being fed to a voltage-doubler with schottky diodes ... > > The PSU has a quite high > > capacitance input filter, and without this soft start timed power > > up, needs a

Re: Need a calculator that knows about coulombs

Gene H writes: > The only thing I needed an electrician for was to do the drop seal > break & disconnect, install a heavier drop to the new meterhead, the > inspector came... Electricians, permits and inspectors eh? I guess when you have oppressive government you just have to live with these

Re: Need a calculator that knows about coulombs

On 12/23/2015 02:09 AM, Gene Heskett wrote: Ahh, but its being fed to a voltage-doubler with schottky diodes ... The PSU has a quite high capacitance input filter, and without this soft start timed power up, needs a 30 amp breaker in the service in order for the breaker to withstand the power up

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

On Wednesday 23 December 2015 20:33:57 John Hasler wrote: > Bob Bernstein writes: > > And I have to say, this electrical stuff is a lot sexier than poopy > > linux stuff! > > I could bore you to tears in 15 minutes with anecdotes about hospital > wiring design. Having read some of the extra's

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

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! -- Bob Bernstein

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

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 jhas...@newsguy.com Elmwood, WI USA

Re: Need a calculator that knows about coulombs

Bob Bernstein writes: > And I have to say, this electrical stuff is a lot sexier than poopy > linux stuff! I could bore you to tears in 15 minutes with anecdotes about hospital wiring design. -- John Hasler jhas...@newsguy.com Elmwood, WI USA

Re: Need a calculator that knows about coulombs

Gene H writes: > Having read some of the extra's for that, its no wonder the bid > estimates are 400% of what the takeoff guy totals up. We had an in-house construction operation for small projects of the sort I designed. They were mostly pretty good but my biggest problems came from their

Re: Need a calculator that knows about coulombs

On Wednesday 23 December 2015 21:19:33 John Hasler wrote: > Gene H writes: > > Having read some of the extra's for that, its no wonder the bid > > estimates are 400% of what the takeoff guy totals up. > > We had an in-house construction operation for small projects of the > sort I designed. They

Re: Need a calculator that knows about coulombs

Gene H writes: > Here in Wv, jumper cables across the meter socket have been a problem, > so a broken seal on the meters retaining ring is a felony. Its also a > felony in several other states I have lived and worked in. Well, sure. When I rewired the farm with buried cable and put in the new

Re: Need a calculator that knows about coulombs

http://electronics.stackexchange.com/ Hope this helps.

Re: Need a calculator that knows about coulombs

On Wednesday 23 December 2015 19:25:40 John Hasler wrote: > Gene H writes: > > Here in Wv, jumper cables across the meter socket have been a > > problem, so a broken seal on the meters retaining ring is a felony. > > Its also a felony in several other states I have lived and worked > > in. > >

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

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 >

Re: Need a calculator that knows about coulombs

On Wednesday 23 December 2015 14:33:39 John Hasler wrote: > Gene H writes: > > The only thing I needed an electrician for was to do the drop seal > > break & disconnect, install a heavier drop to the new meterhead, the > > inspector came... > > Electricians, permits and inspectors eh? I guess

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

On Tuesday 22 December 2015 20:31:50 rlhar...@oplink.net wrote: > 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 That too is a new term to

Re: Need a calculator that knows about coulombs

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 jhas...@newsguy.com Elmwood, WI USA

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

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

Need a calculator that knows about coulombs

Greetings all; Do we have such a beast? Thanks. 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) Some mill pix are at: Genes Web page

Re: Need a calculator that knows about coulombs

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

Re: Need a calculator that knows about coulombs

On 12/22/2015 05:09 PM, Gene Heskett wrote: Greetings all; Do we have such a beast? Thanks. Cheers, Gene Heskett Free on the web: http://www.endmemo.com/physics/coulomb.php -- Debian Jessie - KDE 4.14.2 - EXT4 - AMD64 at sda10 Registered Linux User #380263

Re: Need a calculator that knows about coulombs

On Tuesday 22 December 2015 20:17:58 Jimmy Johnson wrote: > On 12/22/2015 05:09 PM, Gene Heskett wrote: > > Greetings all; > > > > Do we have such a beast? > > > > Thanks. > > > > Cheers, Gene Heskett > > Free on the web: http://www.endmemo.com/physics/coulomb.php That might be interesting, but

Re: Need a calculator that knows about coulombs

On Tue, 22 Dec 2015 20:09:55 -0500 Gene Heskett 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

Re: Need a calculator that knows about coulombs

http://www.wolframalpha.com is fun. -- Bob Bernstein