Re: [Ngspice-users] Creating inductors in ngspice

[John D. <jp...@no...>]

> On Oct 10, 2018, at 4:01 PM, John <su...@qc...> wrote:
> 
> Marcel,
> 
> True, pin 6 of the lm386 should be connected to vcc. My circuit diagram
> does have a 5vdc source which is connected to the 5v line that goes to
> pin 6 of the LM386. Admittedly the simulation (which does now run)
> shows 0v on the 5v line, but I have no idea why. By contrast the
> sinewave looks fine on R4/R5. I tried changing the GND symbols to 0
> (which I'm told is required by ngspice) but this made no difference.

Getting printed circuit oriented CAD to generate valid SPICE is often a challenge. Ngspice treats “GND” as a global alias for node 0, so you shouldn’t need to rename it.

> 
> 
> On Wed, 2018-10-10 at 20:49 +0200, mh...@ia... wrote:
>> On 2018-10-10 19:09, John wrote:
>>> Thank you for taking the time to respond.
>>> Thanks for all the replies BTW!
>>> 
>>>> Please add a   vcc  source to the LM386. (marcel)
>>> 
>>> Sorry, I'm not sure what I am missing here? I have a power flag, a
>>> power input and a voltage source so I'm not sure what I am missing?
>> 
>> As I read the lm386, the last 3 pins are vcc g1 g8. I think "vcc" is
>> supposed to be connected to a dcvoltage. Your schematic only has
>> a sinewave source and nothing is connected to the "vcc" net.
>> 
>> -marcel
>> 
>> 
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> -- 
> John.
> 
> 
> 
> 
> 
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John Doty              Noqsi Aerospace, Ltd.
jp...@no...