qucs_s VS logisim-evolution

When talking about open source tools, here are some:

KiCad may be used as a schematic entry tool for ngspice, especially for discrete or PCB-based electronics. You may watch several simulation examples (including oscillators) here: https://forum.kicad.info/t/simulation-examples-for-kicad-ees.... KiCad integrates ngspice internally, but may also provide external ngspice with netlists for simulation.

Another GUI to ngspice is XSCHEM, especially useful for IC design work (see https://xschem.sourceforge.io/stefan/index.html). Device models are available by the Open Source PDKs from Google/Skywater, Google/GF, or IHP. A growing community is supporting digital, analog or mixed-signal design flows.

QUCS-S (https://ra3xdh.github.io/) is a GUI for ngspice or XyCE.

Indeed device models have to be added manually to the devices in the circuit schematic, when invoking ngspice via KiCad or QUCS-S, except for some basic devices with integrated models. Models are provided by device makers, distributors or web sites like this one: https://ngspice.sourceforge.io/modelparams.html .

https://ra3xdh.github.io/ (QUCS-S - seems to be active)

​https://ra3xdh.github.io/

https://ra3xdh.github.io

It's still missing a comprehensive component library like LTspice does, though.

KiCad can also simulate circuits through NGSpice, but it's missing a library and suffers from a lot of quirks.

Also see Qucs-S, which is a GUI for ngspice and a few other engines.

https://ra3xdh.github.io/

Try https://github.com/ra3xdh/qucs\s)

I have downloaded logisim-evolution from github. While trying to run .msi file, Microsoft Defender blocked it for some reason. I scanned it with some other scanners and everything was fine. I'm not sure if this is safe to install it.

I am trying to define an xbps-src template for logisim-evolution, a Java app that requires Java 16. I am using depends="virtual?java-runtime" and, as expected by reading etc/defaults.virtual, OpenJDK 8 is used. Creating a etc/virtual file is ignored in .gitignore, so I guess it is made to be used with local packages. Using depends="virtual?java-runtime-17.0.5+7_1" works, as OpenJDK 17 provides that exact version of java-runtime. If it were updated, this package would break, because if I input a lower version, it will fail. I've tried using syntax like > and >=, but then I get the following error:

Logism evolution works great and is quite modern.

https://github.com/logisim-evolution/logisim-evolution

According to Logisim it creates the correct sequence for full stepping on a bipolar configuration. Falstad's Circuit simulator is another one you might try.

Did you check logisim-evolution? It is an active fork of logisim maintained by several lecturers at the Bern University of Applied Sciences.

Here is the link for Logisim Evolution: https://github.com/logisim-evolution/logisim-evolution

In school, I worked on an introductory CS/EE class many, many moons ago, and I believed we used something like "logisim", which by then was pretty awesome - you could build simple things like adders, combine those with "macros" to bui;d ALUs and then whole simple CPUs.

Since then, the logisim project has discontinued, but it looks like there is a open source successor:

https://github.com/logisim-evolution/logisim-evolution

Have not tried it, but it looks promising, provided you don't want to do too complicated things (not sure if you could really model complex CPUs like a pentium with it). Also, it's pretty digital only, so I wouldn't expect Mac-Spice-like analog circuit simulation.

though i'd heavily recommend first building the circuit in a logic simulator like Logisim, or Digital before trying to build it in a game for an FPGA. (Digital even allows you to export circuits as Verilog/VHDL, and as a certified lazy person, that is very useful)

Logisim-evolution An alternative free and open-source tool to design and simulate digital logic.

See if you are comfortable playing in https://github.com/logisim-evolution/logisim-evolution