Nov 26, 2020 - Multisim Live is a free, online circuit simulator that includes SPICE software, which lets you create, learn and share circuits and electronics online. Multisim Live™ delivers SPICE simulation to you anywhere, anytime. Learn electronics with an interactive, online, touch-optimized environment that works on any device. With a database of over 30,000 community circuits, you can immediately turn inspiration into simulation. Try it now for free!
Multisim Online Version
Getting started with National Instruments Multisim
Multisim is the preferred SPICE circuit simulator for use in EE-331. The current version that is installed on the general purpose computers in the EE Department is 11.0. Multisim was originally developed by Electronics Workbench in Canada, along with the companion printed circuit board (PCB) layout tool Ultiboard. Electronics Workbench was bought by National Instruments in 2007, and the Multisim and Ultiboard products are now marketed and supported by National Instruments. Multisim and Ultiboard also couple closely to LabVIEW when needed.
Several separate tasks comprise the overall process of circuit simulation. These include: (1) schematic capture, (2) device modeling, (3) setting up and running the simulation, and (4) output analysis. A quick, step-by-step tutorial has been created to help learn Multisim and how to accomplish each of these four tasks. The tutorial works through the schematic entry, device modeling, DC transfer curve analysis, and transient analysis of a full-wave bridge rectifier with capacitive filtering.
A Quick EE-331 Tutorial on Multisim Circuit Analysis.pdf (1085 kB)
One of the best places to get help on Multisim is within Multisim itself. Multisim has a fairly good, indexed, and complete set of help files. Another important resource is the collection of built-in example files. There are two toolbar buttons (or menu items) for opening a file: the regular open file button, and a blue colored open example file button right beside it. Clicking on the blue open example file button will allow selecting an example from a rather extensive set that is organized by circuit and analysis category. A circuit file can be opened using either of the buttons, but the blue open example file button automatically opens up the file selection dialog within the directory of the example files. Very often one of these examples has most of the analysis set up, and only the circuit itself needs to be modified. These examples generally illustrate best practices, and can be very useful for learning how to set up a new type of analysis or use some less common feature. Ultiboard also features the blue open example file button, although the number of examples that it has are far less than in Multisim.
In addition, National Instruments has several useful tutorials on their web site. The best starting one is:
Introduction to Multisim: Learn to Capture and Simulate in Less Than 30 Minutes:
A PDF manual can also be downloaded, 'NI Circuit Design Suite - Getting Started with NI Circuit Design Suite':
The NI Multisim Fundamental Circuits is a series of chapters that provide tutorial guidance on simulation for specific devices. Each chapter is a link to a .zip file which contains example circuits using the devices of that chapter.
Chapter 1: RLC Circuits
Chapter 2: Diodes
Chapter 3: Transistors
Chapter 4: Amplifiers
Chapter 5: Opamps
Chapter 6: Filters
Chapter 7: Miscellaneous Circuits
The Circuit Design Technical Library offers a number of different example circuits and analysis methods and also some tutorials on prototype layout and routing using Ultiboard:
The Multisim Schematic Capture and Circuit Design Glossary is a short introduction to the terminology and graphics cues which are used in Multisim. It is also helpful for understanding the organization of the Select Component window and how that interacts with the various part databases: