The National Instruments SPICE Simulation Fundamentals Series is your free resource on the Internet for learning about circuit simulation. The series is a set of tutorials and information on SPICE simulation, OrCAD pSPICE simulation, SPICE modeling, and other concepts in circuit simulation.
The series is divided among a number of in-depth detailed articles that offer HOW TO information on the important concepts and details of SPICE simulation.
Circuit simulation is an important part of any design process. By simulating your circuits, you can detect errors early in the process, and avoid costly and time-consuming prototype reworking. You can also easily swap components to evaluate designs with varying bills of materials (BOMs).
NI Multisim is an example of an easy-to-use, powerful, and flexible SPICE simulation environment that allows educators to teach circuit theory, and engineers to quickly design topologies.