I need a free circuit testing program

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Discussion Overview

The discussion revolves around finding a free circuit testing program that includes diodes, specifically for determining voltages at certain points in a circuit. The scope includes software recommendations and features relevant to circuit simulation.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks a free circuit testing program that can handle diodes and help identify voltages in a circuit.
  • Another participant suggests that the request may refer to a simulator and mentions SPICE-like freeware from chipmakers such as Linear Technologies and TI.
  • A third participant recommends INTUSOFT's ICAPS Spice modeling software, noting its limitations on the number of components but highlighting its graphical interface and capabilities for displaying DC voltages and performing parametric sweeps.
  • A later reply recalls that the TI simulator has a limit on the number of nodes in a circuit, while the LT simulator reportedly has no such limit.

Areas of Agreement / Disagreement

Participants provide various software options and features, but there is no consensus on a single best solution, and limitations of different programs are noted without resolution.

Contextual Notes

Limitations include the maximum number of components and nodes in different simulators, which may affect usability for certain circuit designs.

snowJT
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Does anyone here know of a good circuit testing program that is free that includes diodes? I need to find certain voltages on specific points on a circuit, and I can't find anything good out there that can help.
 
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INTUSOFT (http://www.intusoft.com/) do a fully functional evaluation of their ICAPS Spice modelling software.

It is limited to 20 components in circuit but does allow you to group components into sub-circuits of up to 20 components each that boost the amount of actual components you can model.

It is all graphical and allows you to display the DC initial condition voltages on your schematic.
Or you can do parametric sweeps to determine how voltages change with changing component values.

The standard library has over 1500 components and has both diode primatives that you can create your own diode model based on datasheet values and a wide range of commercial diode models.
 
This reminds me that the TI simulator had an upper limit on the number of nodes in the circuit (less than 50, I think), but the LT simluator had no limit.
 

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