Through this article on circuit simulation my goal is to have a useful tutorial for students and enthusiasts to jump start into circuit simulation using taking advantage of the free software available on the WWW. The softwares run on Linux though. However, I felt that writing a tutorial from scratch will be unnecessary as good tutorial are already there, though not all at the same place. Hence, I have identified some very useful resources and have brought them out here. So, lets start and go in steps. Analyzing Circuits with SPICE on Linux, http://www.linuxjournal.com/article/2169?page=0,0 by Kevin Cosgrove This article written in 1997, covers the essentials to simulate your first circuit and will give you a puritan perspective of SPICE and its usage. However I recommend that we wait before actually trying out the things. This is because the SPICE package Kevin demonstrates is spice3. However, we shall use ngspice which is nothing but an improvement over spice3 and is now th...