Qucs is a free circuit simulator for Windows, Linux and Mac. It comes complete with a schematic editor, project manager and other useful tools.
Qucs is very easy to use and support the standard DC, AC, Parameter Sweep, Transient, digital and other simulations, it also includes a selection of popular component models.
Qucs can display the simulation data in a number of ways such as Cartesian Plot, Polar, Tabular, Smith Chart, Timing Diagram and Truth Table.
Installing
First open the terminal and type the following:
cd ~
wget -t5 http://downloads.sourceforge.net/project/qucs/qucs/0.0.15/qucs-0.0.15.tar.gz?use_mirror=kent
This is download the latest version of Qucs, once that is done you will need to extract it:
tar -xvzf qucs-0.0.15.tar.gz
If you want to delete the Qucs source archive you can do so by using this, if not skip this next command.
rm qucs-0.0.15.tar.gz
Now you need to move the folder to where you want to compile it, if you don’t mind it being in your home folder skip this:
sudo mv qucs-0.0.15 /usr/src
cd /usr/src/qucs-0.0.15
Next move into the folder and download the dependencies required to compile Qucs:
cd qucs-0.0.15
sudo apt-get install libqt3-headers
Finally you can compile Qucs:
./configure
make
sudo make install
Once this is done (hopefully without any errors) you can run Qucs simply by typing:
qucs
That’s all, although I’d suggest adding a shortcut to your menu.
Posted by chryseus8086 
