Why doesn't this LM324 OpAmp C\circuit oscillate in Kicad NGspice?

Schematic Simulation (Ngspice)
1

The attached is an oscillator circuit based on the OnSemi Single Supply LM324 Opamp Data Sheet App Note HERE.
I re-created it in Kicad 6.99 and ran the simulation using NGspice…
but it won’t oscillate.
Maybe someone can help me figure out what I have wrong.
Thanks for any help.

(https://www.onsemi.com/pdf/datasheet/lm324-d.pdf)
LM324_osc.zip (11.1 KB)

PS - I’m using 6.99 because of a new feature it had and I have had zero trouble with it.
Application: KiCad (64-bit)
Version: (6.99.0-942-g3129f96686), release build
Libraries:
wxWidgets 3.1.5
FreeType 2.11.1
libcurl/7.78.0-DEV Schannel zlib/1.2.11
Platform: Windows 10 (build 19043), 64-bit edition, 64 bit, Little endian, wxMSW
Build Info:
Date: Feb 15 2022 03:53:16
wxWidgets: 3.1.5 (wchar_t,wx containers)
Boost: 1.76.0
OCC: 7.6.0
Curl: 7.78.0-DEV
ngspice: 36
Compiler: Visual C++ 1928 without C++ ABI
Build settings:
KICAD_USE_OCC=ON
KICAD_SPICE=ON

2

Best also post a screen shot of your schematic.

3

Indeed, posting a schematic (screenshot or pdf) would be useful here because a lot of people (including me) do not use the nightlies.

4

Good suggestion ekoeck & paulvdh.
Here is a screen shot of the circuit.

image
image1244×892 8.4 KB

Thanks for any help on this folks.

5

It looks like it’s supposed to be a

You could start by swapping the inverting and non inverting inputs.

6

That did it Paulvdh.
I swapped the inverting and non inverting inputs as you suggested and
now the circuit oscillates as advertised.
That was a slip up on my part so thanks for your keen eye and the help!