Re: Raspberry Pi goes to war

From	Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups	sci.electronics.design
Subject	Re: Raspberry Pi goes to war
Date	2026-02-03 17:47 +0000
Organization	A noiseless patient Spider
Message-ID	<10ltcc8$1m6ek$1@dont-email.me> (permalink)
References	(8 earlier) <uno1okl33bubrtdepe37hh98o40j75o4cm@4ax.com> <10lqqf6$s1gj$1@dont-email.me> <o922okdo1khd51uocipmiavu8nnqkej0cm@4ax.com> <10lt7eq$1kbuf$1@dont-email.me> <kv94ok94jfqi42kdjis9ae7cj5gv82gq44@4ax.com>

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john larkin <jl@glen--canyon.com> wrote:
> On Tue, 3 Feb 2026 16:23:54 -0000 (UTC), Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
> 
>> john larkin <jl@glen--canyon.com> wrote:
>>> On Mon, 2 Feb 2026 18:29:58 -0000 (UTC), Phil Hobbs
>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>> 
>>>> john larkin <jl@glen--canyon.com> wrote:
>>>>> On Sun, 01 Feb 2026 11:58:27 GMT, Jan Panteltje <alien@comet.invalid>
>>>>> wrote:
>>>>> 
>>>>>>> john larkin <jl@glen--canyon.com>wrote:
>>>>>>>> On Thu, 29 Jan 2026 14:09:28 GMT, Jan Panteltje <alien@comet.invalid>
>>>>>>> wrote:
>>>>>>> 
>>>>>>>>> john larkin <jl@glen--canyon.com>wrote:
>>>>>>>>> 
>>>>>>>>> Approximately 2% of all Russian men aged 20-50 may have been killed or
>>>>>>>>> seriously wounded by Ukrainians, many with smart drones.
>>>>>>>>> 
>>>>>>>>> The r/u casuality ratio is over 2:1 and likely increasing.
>>>>>>>>> 
>>>>>>>>> https://en.wikipedia.org/wiki/Russian_emigration_during_the_Russo-Ukrainian_war_
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> Why dio so many people sympathize with genocidal thugs?
>>>>>>>> 
>>>>>>>> tramp is, among many more bad and evil things, a genocidel thug who
>>>>>>>> killed thousands in Gaza by supplying arms to the religious
>>>>>>>> fanatic YouWitz sect
>>>>>>>> Killed people in Venezuela
>>>>>>>> killed people in boats
>>>>>>>> Killed US people in Minnesota
>>>>>>>> Probably had Epstein killed so he would not talk about his sex
>>>>>>>> 
>>>>>>>> He wants to do the same in Iran now, wants to kill Cubans, invade
>>>>>>>> Cuba, steals oil just like double you you bushman did in
>>>>>>>> Iraq
>>>>>>>> What a bunch of crap 'merrica has become
>>>>>>>> World may unload its radioactive waste on those divided states any
>>>>>>>> time now, the doomsday clock is making noises.
>>>>>>>> tramp ape has no respect for anything but maybe a gun on - or a bullet
>>>>>>>> through the empty bubble mounted above his shoulders.
>>>>>>>> 
>>>>>>>> ego maniac nutcase he is.
>>>>>>>> 
>>>>>>>> And the more stupid the 'leader' the more the simple minded follow
>>>>>>>> him: Youws and 'Adam did it with Eve' reciters.
>>>>>>> 
>>>>>>> The best thing Cuba could do for its people is start a war with the US
>>>>>>> and lose. Of course,  the communist party is dumb, but not that dumb.
>>>>>>> 
>>>>>>> 
>>>>>>> John Larkin
>>>>>>> Highland Tech Glen Canyon Design Center
>>>>>>> Lunatic Fringe Electronics
>>>>>> 
>>>>>> YOU DO NOT HAVE TO CONFIRM YOU ARE BRAINDEAD
>>>>> 
>>>>> Has your keyboard died? Caps lock stuck? Or still using a Teletype?
>>>>> 
>>>> 
>>>>> 
>>>> 
>>>> I mean, it worked for Grand Fenwick. 
>>>> 
>>>> Cheers 
>>>> 
>>>> Phil Hobbs
>>> 
>>> You youngsters can't remember the joy of getting a high speed paper
>>> tape reader.
>>> 
>>> 
>>> John Larkin
>>> Highland Tech Glen Canyon Design Center
>>> Lunatic Fringe Electronics
>>> 
>> 
>> Well, I did use one, writing a program for an original Data General Nova
>> for an undergrad physics lab, circa 1978
> 
> What language?
> 
Fortran, iirc. To save machine time, Wolf Breuer The Lab Guy set it up to
run split core, so that we could run two or maybe four people’s programs at
once, and I expect that having multiple copies of the Basic interpreter
probably wouldn’t fit in RAM. 
> 
> None of the minicomputer companies survived.

Well, DEC became part of Compaq, and then the Fiorina HP, which if you call
that survival. 

> 
> I had a PDP-8 (4K words of 12-bit core memory) that ran Focal, an
> intrepretive language. I used it to simulate the throttle control and
> propulsion system, including hull dynamics, of the 32,000 horsepower
> LASH ships. I plotted the step responses on the Teletype. We showed it
> to the owners and got the job.
> 
> Other engineers said that I couldn't use simple rectangular
> integration, that I had to use some runga-kuta math or something. But
> the elements of the control system were mostly unilateral, and simple
> integration will even work in a circuit if the steps are small.

SPICE uses trapezoidal, which is the same order as rectangular.  

But the advice wasn’t altogether stupid. The usual fourth-order Runge-Kutta
algorithm has faster convergence on smooth solutions, is pretty simple to
code, and is self-starting like rectangular. 

Its main warts are that it’s slower than predictor-corrector or
Bulirsch-Stoer, and that it supplies no internal error estimate.  Sixth and
higher orders do supply that, but I’ve never coded them. 

Cheers 

Phil Hobbs 

-- 
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics

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Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-27 10:43 -0800
  Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-27 15:22 -0500
    Re: Raspberry Pi goes to war wmartin <wwm@wwmartin.net> - 2026-01-27 12:27 -0800
      Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-27 13:46 -0800
        Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-27 17:19 -0500
          Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-27 14:45 -0800
        Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-29 02:54 +1100
          Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-28 08:13 -0800
            Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-28 14:21 -0500
              Re: Raspberry Pi goes to war Joe Gwinn <joegwinn@comcast.net> - 2026-01-28 16:02 -0500
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-29 13:41 +1100
                Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-28 22:59 -0500
                Re: Raspberry Pi goes to war Joe Gwinn <joegwinn@comcast.net> - 2026-01-29 17:46 -0500
                Re: Raspberry Pi goes to war Coileán Pól Nioclás de Ghlostéir <thanks-to@Taf.com> - 2026-01-29 14:41 +0100
                Re: Raspberry Pi goes to war Lasse Langwadt <llc@fonz.dk> - 2026-01-29 19:03 +0100
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-30 15:25 +1100
                Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-30 10:15 +0000
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-30 04:03 -0700
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-31 00:12 +1100
                Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-30 13:25 +0000
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-30 07:03 -0700
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-31 16:35 +1100
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-31 00:09 +1100
                Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-30 13:43 +0000
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-31 02:34 +1100
            Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-29 13:25 +1100
          Re: Raspberry Pi goes to war albert@spenarnc.xs4all.nl - 2026-01-29 12:18 +0100
            Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 05:00 -0800
              Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-01-29 14:09 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 08:53 -0800
                Re: Raspberry Pi goes to war Gerhard Hoffmann <dk4xp@arcor.de> - 2026-01-29 20:25 +0100
                Re: Raspberry Pi goes to war Joe Gwinn <joegwinn@comcast.net> - 2026-01-29 18:18 -0500
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 16:53 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-30 15:49 +1100
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-01 11:58 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-02 09:48 -0800
                Re: Raspberry Pi goes to war Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-02-02 18:29 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-02 12:33 -0800
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-03 05:50 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-03 07:56 -0800
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-04 05:44 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-04 03:24 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-05 01:35 +1100
                Re: Raspberry Pi goes to war Gerhard Hoffmann <dk4xp@arcor.de> - 2026-02-04 21:31 +0100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-04 13:21 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-05 16:50 +1100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-05 11:36 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-06 18:30 +1100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-06 03:41 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-07 01:12 +1100
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-05 16:46 +1100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-05 11:37 -0800
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-06 06:18 +0000
                Re: Raspberry Pi goes to war Jeroen Belleman <jeroen@nospam.please> - 2026-02-06 09:51 +0100
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-06 12:30 +0000
                Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-02-05 09:14 +0000
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-02-05 04:39 -0700
                Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-02-05 14:30 +0000
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-02-05 08:36 -0700
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-06 02:07 +1100
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-04 15:53 +0000
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-05 01:04 +1100
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-04 15:58 +0000
                Re: Raspberry Pi goes to war Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-02-03 16:23 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-03 09:03 -0800
                Re: Raspberry Pi goes to war Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-02-03 17:47 +0000
                Re: Raspberry Pi goes to war wmartin <wwm@wwmartin.net> - 2026-02-03 11:18 -0800
                Re: Raspberry Pi goes to war Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2026-02-04 01:21 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-03 18:52 -0800
                Re: Raspberry Pi goes to war Joe Gwinn <joegwinn@comcast.net> - 2026-02-03 13:40 -0500
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-02-03 23:38 +1100
                Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-02-03 05:41 +0000
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-02-03 10:46 -0800
              Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-30 03:08 +1100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 08:56 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-30 15:56 +1100
            Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-30 03:04 +1100
              Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 08:59 -0800
                Re: Raspberry Pi goes to war Gerhard Hoffmann <dk4xp@arcor.de> - 2026-01-29 20:50 +0100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 19:22 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-30 16:00 +1100
            Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 15:43 -0800
        Re: Raspberry Pi goes to war Lasse Langwadt <llc@fonz.dk> - 2026-01-28 17:42 +0100
    Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-27 13:47 -0800
      Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-27 17:31 -0500
        Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-27 14:42 -0800
          Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-27 17:55 -0500
            Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-27 15:03 -0800
              Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-27 19:04 -0500
                Re: Raspberry Pi goes to war albert@spenarnc.xs4all.nl - 2026-01-29 12:24 +0100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-29 10:43 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-30 16:07 +1100
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-30 11:45 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-31 16:51 +1100
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-29 23:03 -0700
          Re: Raspberry Pi goes to war Gerhard Hoffmann <dk4xp@arcor.de> - 2026-01-28 00:18 +0100
          Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-28 11:57 +0000
            Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-28 08:19 -0800
              Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-28 15:18 -0500
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-28 13:12 -0800
                Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-28 16:54 -0500
            Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-28 15:13 -0500
    Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-27 15:32 -0700
      Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-27 17:44 -0500
        Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-27 15:55 -0700
          Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-27 19:13 -0500
            Re: Raspberry Pi goes to war Joe Gwinn <joegwinn@comcast.net> - 2026-01-27 19:53 -0500
            Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-27 20:30 -0700
              Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-29 01:56 +1100
              Re: Raspberry Pi goes to war albert@spenarnc.xs4all.nl - 2026-01-29 12:29 +0100
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-29 23:09 -0700
              Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-30 13:25 +0000
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-30 07:07 -0700
                Re: Raspberry Pi goes to war john larkin <jl@glen--canyon.com> - 2026-01-30 11:49 -0800
                Re: Raspberry Pi goes to war Bill Sloman <bill.sloman@ieee.org> - 2026-01-31 02:40 +1100
                Re: Raspberry Pi goes to war wmartin <wwm@wwmartin.net> - 2026-01-30 11:23 -0800
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-31 01:17 -0700
                Re: Raspberry Pi goes to war wmartin <wwm@wwmartin.net> - 2026-01-31 12:19 -0800
                Re: Raspberry Pi goes to war Don Y <blockedofcourse@foo.invalid> - 2026-01-31 18:36 -0700
            Re: Raspberry Pi goes to war liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-01-30 13:25 +0000
    Re: Raspberry Pi goes to war Lasse Langwadt <llc@fonz.dk> - 2026-01-28 17:38 +0100
      Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-28 17:19 -0500
      Re: Raspberry Pi goes to war bitrex <user@example.net> - 2026-01-28 17:36 -0500
  Re: Raspberry Pi goes to war Jan Panteltje <alien@comet.invalid> - 2026-01-28 06:26 +0000

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