acidbourbon / numpy_ltspice_filter

A python module for seamless integration of analog filters designed in LTspice into Python3/Numpy signal processing projects.

numpy_ltspice_filter

A python module for seamless integration of analog filters designed in LTspice into Python3/Numpy signal processing projects.

For a demonstration of its uses:

run ./filter_demo.py and ./fast_convolution_filter_demo.py

find an extensive article about this software example at: https://acidbourbon.wordpress.com/2019/11/26/seamless-integration-of-ltspice-in-python-numpy-signal-processing/

and a follow-up article about fast convolution filtering using LTspice: https://acidbourbon.wordpress.com/2019/12/04/ltspice-numpy-part-2-fast-convolution-filter/

The utilities in this repository heavily rely on the PyLTSpice module developed by Nuno Brum. It is now a pip package. Install via: sudo pip3 install PyLTSpice

A warm thank you to Nuno.

numpy_ltspice_filter's Issues

Only seeing 1 plot

[Windows example, using filter_demo.py without changes]

Everything is basically working but I only see one output plot.

• It seems to correspond to b2 in the example, regardless of which parameters are used.
• It seems like parameters are being hard-coded somewhere, because I'm changing "C" and "L" but the plots are always the same.
• If I use one set of parameters at a time, I can see they get written to param.txt.

Note: I ran the simulation in LTSpice first, to output the raw file, because the Python script appeared to need it as an input.

Thanks

Control simulation with python

Hi, got here from your article!

Do you know if somehow is it possible to interact with the circuit during the simulation? I got your idea of setting some variables in the circuit then use python to simulate with many values, but how about decide a value between time steps?

Im researching on MPPT AI based control, so Im looking a manner to be able to simulate a circuit in python and for each time step, read some values and act on control.