On Tue, 2 Jan 2024 21:17:27 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

Got it installed with wine here on my PC. Fonts are a bit wonky, but
that happens from time to time, so not going to really bother with it.

Took things for a spin by trying to build your basic low-pass filter as
one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I
just blind, and missed them somewhere in the myriad of semi-cryptic
parts, or is it just that they happen to not be modeled in the base
product?

There's a voltage-controlled switch SW. Ask HELP to search for
'switch'.

S is in the index too.

In the component selector, search for SW. It needs a .model statement.

Use a voltage source to switch it.

Or just poke a voltage source into your filter. Or use a voltage
source and a mosfet.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Got it installed with wine here on my PC. Fonts are a bit wonky, but
that happens from time to time, so not going to really bother with it.

Took things for a spin by trying to build your basic low-pass filter as
one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I
just blind, and missed them somewhere in the myriad of semi-cryptic
parts, or is it just that they happen to not be modeled in the base
product?

--
|_|O|_|
|_|_|O| Github: https://github.com/dpurgert
|O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 2 Jan 2024 22:26:46 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

On 2024-01-02, john larkin wrote:

On Tue, 2 Jan 2024 21:17:27 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

Got it installed with wine here on my PC. Fonts are a bit wonky, but >>>that happens from time to time, so not going to really bother with it.

Took things for a spin by trying to build your basic low-pass filter as >>>one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I >>>just blind, and missed them somewhere in the myriad of semi-cryptic >>>parts, or is it just that they happen to not be modeled in the base >>>product?

There's a voltage-controlled switch SW. Ask HELP to search for
'switch'.

Yeah, I saw that. I was looking for "generic bogus button" type "switch"
(not that sw or csw wouldn't work). I'll probably just work-around it
by inserting one of the variable voltage sources I noticed (IIRC, one
said it'd do square wave, I think).

Yeah, the V voltage source (in "advanced" mode) has a pulse generator
mode.

I usually specify a rise and fall time. LT is a little weird if you
use defaults.

Note that if Tr=Tf=Ton=1, it's above zero for 3 seconds. Ton is the
flat part.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 2024-01-02, john larkin wrote:

On Tue, 2 Jan 2024 21:17:27 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

Got it installed with wine here on my PC. Fonts are a bit wonky, but
that happens from time to time, so not going to really bother with it.

Took things for a spin by trying to build your basic low-pass filter as
one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I >>just blind, and missed them somewhere in the myriad of semi-cryptic
parts, or is it just that they happen to not be modeled in the base >>product?

There's a voltage-controlled switch SW. Ask HELP to search for
'switch'.

Yeah, I saw that. I was looking for "generic bogus button" type "switch"
(not that sw or csw wouldn't work). I'll probably just work-around it
by inserting one of the variable voltage sources I noticed (IIRC, one
said it'd do square wave, I think).

--
|_|O|_|
|_|_|O| Github: https://github.com/dpurgert
|O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 02 Jan 2024 14:42:36 -0800, john larkin <jl@650pot.com> wrote:

On Tue, 2 Jan 2024 22:26:46 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

On 2024-01-02, john larkin wrote:

On Tue, 2 Jan 2024 21:17:27 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

Got it installed with wine here on my PC. Fonts are a bit wonky, but >>>>that happens from time to time, so not going to really bother with it.

Took things for a spin by trying to build your basic low-pass filter as >>>>one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I >>>>just blind, and missed them somewhere in the myriad of semi-cryptic >>>>parts, or is it just that they happen to not be modeled in the base >>>>product?

There's a voltage-controlled switch SW. Ask HELP to search for
'switch'.

Yeah, I saw that. I was looking for "generic bogus button" type "switch" >>(not that sw or csw wouldn't work). I'll probably just work-around it
by inserting one of the variable voltage sources I noticed (IIRC, one
said it'd do square wave, I think).

Yeah, the V voltage source (in "advanced" mode) has a pulse generator
mode.

I usually specify a rise and fall time. LT is a little weird if you
use defaults.

Note that if Tr=Tf=Ton=1, it's above zero for 3 seconds. Ton is the
flat part.

Sometimes it's handy to use a sine wave source and square it up with a comparator. That makes square waves easier.

An e with a tanh function makes a nice comparator.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On 2024-01-02, john larkin wrote:

On Tue, 2 Jan 2024 22:26:46 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

On 2024-01-02, john larkin wrote:

On Tue, 2 Jan 2024 21:17:27 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

Got it installed with wine here on my PC. Fonts are a bit wonky, but >>>>that happens from time to time, so not going to really bother with it.

Took things for a spin by trying to build your basic low-pass filter as >>>>one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I >>>>just blind, and missed them somewhere in the myriad of semi-cryptic >>>>parts, or is it just that they happen to not be modeled in the base >>>>product?

There's a voltage-controlled switch SW. Ask HELP to search for
'switch'.

Yeah, I saw that. I was looking for "generic bogus button" type "switch" >>(not that sw or csw wouldn't work). I'll probably just work-around it
by inserting one of the variable voltage sources I noticed (IIRC, one
said it'd do square wave, I think).

Yeah, the V voltage source (in "advanced" mode) has a pulse generator
mode.

I usually specify a rise and fall time. LT is a little weird if you
use defaults.

Yes, I'm starting to notice that :)

Note that if Tr=Tf=Ton=1, it's above zero for 3 seconds. Ton is the
flat part.

Thanks (and for the hint about comparators). Lots to learn here :)


--
|_|O|_|
|_|_|O| Github: https://github.com/dpurgert
|O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

On Tue, 02 Jan 2024 14:58:21 -0800, john larkin <jl@650pot.com> wrote:

On Tue, 02 Jan 2024 14:42:36 -0800, john larkin <jl@650pot.com> wrote:

On Tue, 2 Jan 2024 22:26:46 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

On 2024-01-02, john larkin wrote:

On Tue, 2 Jan 2024 21:17:27 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

Got it installed with wine here on my PC. Fonts are a bit wonky, but >>>>>that happens from time to time, so not going to really bother with it. >>>>>
Took things for a spin by trying to build your basic low-pass filter as >>>>>one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I >>>>>just blind, and missed them somewhere in the myriad of semi-cryptic >>>>>parts, or is it just that they happen to not be modeled in the base >>>>>product?

There's a voltage-controlled switch SW. Ask HELP to search for
'switch'.

Yeah, I saw that. I was looking for "generic bogus button" type "switch" >>>(not that sw or csw wouldn't work). I'll probably just work-around it
by inserting one of the variable voltage sources I noticed (IIRC, one >>>said it'd do square wave, I think).

Yeah, the V voltage source (in "advanced" mode) has a pulse generator
mode.

I usually specify a rise and fall time. LT is a little weird if you
use defaults.

Note that if Tr=Tf=Ton=1, it's above zero for 3 seconds. Ton is the
flat part.

Sometimes it's handy to use a sine wave source and square it up with a >comparator. That makes square waves easier.

An e with a tanh function makes a nice comparator.

Not e, but BV. If node J is a sine wave, a BV with equation

V = tanh(9K*V(J))

makes a nice square wave.

The lamented Jim Thompson turned me on to tanh.

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

John Larkin <jl@997PotHill.com> wrote:

On Tue, 02 Jan 2024 14:58:21 -0800, john larkin <jl@650pot.com> wrote:

On Tue, 02 Jan 2024 14:42:36 -0800, john larkin <jl@650pot.com> wrote:

On Tue, 2 Jan 2024 22:26:46 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

On 2024-01-02, john larkin wrote:

On Tue, 2 Jan 2024 21:17:27 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:

Got it installed with wine here on my PC. Fonts are a bit wonky, but >>>>>> that happens from time to time, so not going to really bother with it. >>>>>>
Took things for a spin by trying to build your basic low-pass filter as >>>>>> one might see on a momentary-contact button (etc.).

Thing is, I wasn't seeing any "switch" or "button" type symbols -- am I >>>>>> just blind, and missed them somewhere in the myriad of semi-cryptic >>>>>> parts, or is it just that they happen to not be modeled in the base >>>>>> product?

There's a voltage-controlled switch SW. Ask HELP to search for
'switch'.

Yeah, I saw that. I was looking for "generic bogus button" type "switch" >>>> (not that sw or csw wouldn't work). I'll probably just work-around it >>>> by inserting one of the variable voltage sources I noticed (IIRC, one
said it'd do square wave, I think).

Yeah, the V voltage source (in "advanced" mode) has a pulse generator
mode.

I usually specify a rise and fall time. LT is a little weird if you
use defaults.

Note that if Tr=Tf=Ton=1, it's above zero for 3 seconds. Ton is the
flat part.

Sometimes it's handy to use a sine wave source and square it up with a
comparator. That makes square waves easier.

An e with a tanh function makes a nice comparator.

Not e, but BV. If node J is a sine wave, a BV with equation

V = tanh(9K*V(J))

makes a nice square wave.

The lamented Jim Thompson turned me on to tanh.

The standard ltspice switch has a nice infinitely-differentiable
characteristic if you specify a negative hysteresis value. It’s an arctan rather than tanh, but it works just as well.

Cheers

Phil Hobbs

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

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)