Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #67999
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Python programming |
| Date | 2014-03-07 17:00 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <lfcu01$872$1@reader1.panix.com> (permalink) |
| References | (3 earlier) <roy-A94C1B.22041912022014@news.panix.com> <5317e2ca$0$9232$e4fe514c@dreader35.news.xs4all.nl> <mailman.7884.1394151937.18130.python-list@python.org> <roy-81D4FE.20242106032014@news.panix.com> <mailman.7888.1394161816.18130.python-list@python.org> |
On 2014-03-07, William Ray Wing <wrw@mac.com> wrote:
> On Mar 6, 2014, at 8:24 PM, Roy Smith <roy@panix.com> wrote:
>>> I spotted a device on the table of the company calibration office...
>>>
>>> As I recall, it was a 100A capable resistor... 0.10 OHM.
>>>
>>> No idea what it was meant for; big binding posts at one end, and a
>>> slab of sheet steel in a "W" shape (smooth curves, not sharp bends).
>>
>> External shunt for an ammeter?
>>
>
> More likely a dummy load for power supply testing.
Could be. Back when I was working on PWM controllers for golf cart
and small car motors, we used to use steel coathangers for test loads,
but once they got past orange and more towards yellow, they started to
get too soft. An appropriately dimensioned chunk of sheet steel would
have been ideal.
> (Normally, ammeter shunts are sized to dissipate as little power as
> possible.)
I've used chunks of coathanger for that too, but I don't think the
resistance was stable enough over temperature to trust the results at
higher currents.
--
Grant Edwards grant.b.edwards Yow! If elected, Zippy
at pledges to each and every
gmail.com American a 55-year-old
houseboy ...
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Python programming ngangsia akumbo <ngangsia@gmail.com> - 2014-02-11 16:21 -0800
Re: Python programming Chris Angelico <rosuav@gmail.com> - 2014-02-12 12:17 +1100
Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-11 21:06 -0500
Re: Python programming Rustom Mody <rustompmody@gmail.com> - 2014-02-11 18:46 -0800
Re: Python programming Roy Smith <roy@panix.com> - 2014-02-11 22:02 -0500
Re: Python programming Gene Heskett <gheskett@wdtv.com> - 2014-02-11 23:14 -0500
Re: Python programming Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-02-12 13:41 +0000
Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-12 21:00 -0500
Re: Python programming Grant Edwards <invalid@invalid.invalid> - 2014-02-13 02:57 +0000
Re: Python programming Roy Smith <roy@panix.com> - 2014-02-12 22:04 -0500
Re: Python programming Chris Angelico <rosuav@gmail.com> - 2014-02-13 14:13 +1100
Re: Python programming Grant Edwards <invalid@invalid.invalid> - 2014-02-13 15:13 +0000
Re: Python programming William Ray Wing <wrw@mac.com> - 2014-02-12 22:56 -0500
Re: Python programming Dan Sommers <dan@tombstonezero.net> - 2014-02-13 05:18 +0000
Re: Python programming Larry Martell <larry.martell@gmail.com> - 2014-02-13 03:30 -0500
Re: Python programming John Ladasky <john_ladasky@sbcglobal.net> - 2014-03-07 10:03 -0800
Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-03-07 19:38 -0500
Re: Python programming John Ladasky <john_ladasky@sbcglobal.net> - 2014-03-08 14:06 -0800
Re: Python programming William Ray Wing <wrw@mac.com> - 2014-03-07 21:46 -0500
Re: Python programming albert@spenarnc.xs4all.nl (Albert van der Horst) - 2014-03-06 02:51 +0000
Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-03-06 19:25 -0500
Re: Python programming Roy Smith <roy@panix.com> - 2014-03-06 20:24 -0500
Re: Python programming William Ray Wing <wrw@mac.com> - 2014-03-06 21:27 -0500
Re: Python programming Larry Hudson <orgnut@yahoo.com> - 2014-03-06 23:56 -0800
Re: Python programming Grant Edwards <invalid@invalid.invalid> - 2014-03-07 17:00 +0000
Re: Python programming Gene Heskett <gheskett@wdtv.com> - 2014-03-07 12:49 -0500
Re: Python programming Asdrúbal Iván Suárez <asdrubalivan.listas@gmail.com> - 2014-02-11 20:01 -0430
Re: Python programming Ben Finney <ben+python@benfinney.id.au> - 2014-02-12 15:09 +1100
Re: Python programming Larry Martell <larry.martell@gmail.com> - 2014-02-12 08:55 -0500
Re: Python programming Roy Smith <roy@panix.com> - 2014-02-12 09:13 -0500
Re: Python programming Larry Martell <larry.martell@gmail.com> - 2014-02-12 11:43 -0500
Re: Python programming Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-12 21:13 -0500
Re: Python programming Tim Delaney <timothy.c.delaney@gmail.com> - 2014-02-13 08:02 +1100
Re: Python programming Chris Angelico <rosuav@gmail.com> - 2014-02-13 08:34 +1100
Re: Python programming Tim Delaney <timothy.c.delaney@gmail.com> - 2014-02-13 09:57 +1100
Re: Python programming Neil Cerutti <neilc@norwich.edu> - 2014-02-13 15:30 +0000
Re: Python programming ngangsia akumbo <ngangsia@gmail.com> - 2014-02-14 12:29 -0800
Re: Python programming 88888 Dihedral <dihedral88888@gmail.com> - 2014-03-05 20:05 -0800
Re: Python programming Beowulf <offroad.adventures.engr@gmail.com> - 2014-03-05 20:19 -0800
Re: Python programming Dan Sommers <dan@tombstonezero.net> - 2014-03-06 04:43 +0000
Re: Python programming Roy Smith <roy@panix.com> - 2014-03-05 23:51 -0500
Re: Python programming Grant Edwards <invalid@invalid.invalid> - 2014-03-06 14:49 +0000
Re: Python programming Steven D'Aprano <steve@pearwood.info> - 2014-03-06 06:17 +0000
Re: Python programming Tim Chase <python.list@tim.thechases.com> - 2014-03-06 07:09 -0600
Re: Python programming Grant Edwards <invalid@invalid.invalid> - 2014-03-06 14:52 +0000
csiph-web