Best Free Circuit Simulation Programs and Component Limits for Different Circuit Types

I want to know the different types of simulations used for different circuits. I want to know the free version limits you to 25 components per schematic?

Jay,
what type of circuit simulation are you looking for?
If you are looking for analog circuit simulation, I've found LTSpice to be good with no limit on number of components. You do have to find or create models for your components though.

For analogue circuit simulation, I used two products, LT Spice, which is actively supported, and has a good following. Additionally, for general analogue and RF simulation, Qucs studio is worth a look.Interestingly Micro-Cap 12 has been discontinued, and is now available for free. It has a goodly number of parts in its library and seems a very capable simulator.All of them take some effort to get into, be prepared to spend some time sitting at a PC, but there are good user manuals available for LT Spice and Micro-Cap.Re Elizabeth's comment, models can be an issue, you will rarely find the exact parts that you need, you can substitute in some cases for widely available components, but specialized products are always a problem, some may have models you can use, others not.Cheers,Richard

Hi.I use also the programs that Richard uses.LTSpice is fantastic and reliable and offers all components by Linear Technology. It's very simple to add a SPICE model of other components, using ".model" or ".subckt" clause.Qucs Studio is very good and it has interesting tools. Also Microcap 12 is fantastic (as i said in previous posts). It has a lot of components and a huge library.You can use, also, the commercial program "Proteus". It has a very big library and many tools for simulation.Very good is also "Circuits js1", for simple circuits. It's very simple and has a good generic library. Good for beginners.Also, SimulIDE is a good program to simulate circuit and microcontroller (PIC, Arduino, etc).The optimum is to use several software.CheersGiovanni