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Re: one potentiometer dividing multiple signals

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On Thu, 19 Mar 2026 11:51:16 -0800, Christopher Howard
<christopher@librehacker.com> wrote:

>> If you provide a netlist or specimen differential equation then we
>> could sketch out how to do this in ASCII art or another netlist.
>
>I was working on a simplified flight model using angle of attack to
>calculate lift and drag, and thus vertical and horizontal acceleration.
>
>* vertical acceleration is lift force minus gravity force, divided by
>  mass
>* gravity force is mass times a gravity variable
>* horizontal acceleration is thrust minus drag force, divided by mass
>* the horizontal acceleration is integrated to give horizontal velocity
>  which is squared and then fed into the circuit that calculates lift
>  and drag force based on angle of attack (coefficients of lift/drag).
>
>Ignoring for the present the detail of different air behavior at
>different altitudes, and banking.
>
>With analog computing, multiplication or division by a constant can be
>done with a potentiometer, though it is physically speaking a voltage division.
>
>It is not obvious to me how combine those three mass related
>calculations into something done with a single summing amplifier and a
>single pot, but I am open minded.

Why not Spice it?


John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics

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one potentiometer dividing multiple signals Christopher Howard <christopher@librehacker.com> - 2026-03-16 07:21 -0800
  Re: one potentiometer dividing multiple signals Martin Brown <'''newspam'''@nonad.co.uk> - 2026-03-16 15:45 +0000
  Re: one potentiometer dividing multiple signals "Edward Rawde" <invalid@invalid.invalid> - 2026-03-16 11:50 -0400
  Re: one potentiometer dividing multiple signals john larkin <jl@glen--canyon.com> - 2026-03-16 09:42 -0700
  Re: one potentiometer dividing multiple signals Don Y <blockedofcourse@foo.invalid> - 2026-03-16 09:54 -0700
  Re: one potentiometer dividing multiple signals liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-03-16 20:03 +0000
    Re: one potentiometer dividing multiple signals liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-03-19 10:01 +0000
  Re: one potentiometer dividing multiple signals antispam@fricas.org (Waldek Hebisch) - 2026-03-17 21:28 +0000
    Re: one potentiometer dividing multiple signals Christopher Howard <christopher@librehacker.com> - 2026-03-18 08:25 -0800
      Re: one potentiometer dividing multiple signals John R Walliker <jrwalliker@gmail.com> - 2026-03-18 16:34 +0000
      Re: one potentiometer dividing multiple signals Martin Brown <'''newspam'''@nonad.co.uk> - 2026-03-19 12:42 +0000
        Re: one potentiometer dividing multiple signals Christopher Howard <christopher@librehacker.com> - 2026-03-19 11:51 -0800
          Re: one potentiometer dividing multiple signals john larkin <jl@glen--canyon.com> - 2026-03-19 13:16 -0700
          Re: one potentiometer dividing multiple signals liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-03-19 22:18 +0000
          Re: one potentiometer dividing multiple signals Jasen Betts <usenet@revmaps.no-ip.org> - 2026-03-20 07:29 +0000
          Re: one potentiometer dividing multiple signals liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-03-20 09:05 +0000
      Re: one potentiometer dividing multiple signals Jasen Betts <usenet@revmaps.no-ip.org> - 2026-03-20 07:25 +0000
        Re: one potentiometer dividing multiple signals liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-03-20 09:05 +0000
  Re: one potentiometer dividing multiple signals someone <cffbf4deb9142bce48974efc0e64dede@example.com> - 2026-03-17 22:30 +0000
  Re: one potentiometer dividing multiple signals liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-03-19 18:44 +0000
  Re: one potentiometer dividing multiple signals Jasen Betts <usenet@revmaps.no-ip.org> - 2026-03-20 07:12 +0000
  Re: one potentiometer dividing multiple signals john larkin <jl@glen--canyon.com> - 2026-03-20 09:08 -0700
    Re: one potentiometer dividing multiple signals Ross Finlayson <ross.a.finlayson@gmail.com> - 2026-03-20 11:52 -0700
    Re: one potentiometer dividing multiple signals Christopher Howard <christopher@librehacker.com> - 2026-03-23 09:09 -0800
      Re: one potentiometer dividing multiple signals piglet <erichpwagner@hotmail.com> - 2026-03-24 08:48 +0000

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