CircuitLogix
It gives you the flexibility to design and test electronic circuits, trying all the "what if" scenarios without ever worrying about faulty parts or bad connections. CircuitLogix supports analog, digital and mixed-signal circuits, and its proven SPICE simulation gives accurate real-world results you can trust. 3DLab is included with both versions of CircuitLogix and is a "virtual reality"-type of lab environment and is designed to closely replicate the appearance and functionality of actual devices and instruments. There are approximately 30 different devices and instruments available in 3DLab, including batteries, switches, meters, lamps, resistors, inductors, capacitors, fuses, oscilloscopes, logic analyzers and frequency counters.
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CircuitSim
CircuitSim is a full SPICE circuit simulator with a 3,000+ component library and a modern schematic editor. No install, free to get started. Built for students, educators, and professionals.
It runs in a browser tab and needs no admin rights, so it works on Chromebooks and locked-down school laptops. Run seven kinds of analysis: interactive, interactive operating point, transient, AC sweep, DC operating point, DC sweep, and parameter sweep. Results plot on oscilloscope-style charts, with probes you can drop anywhere in the circuit. Define custom parts from SPICE model text or import KiCad symbols.
CircuitSim also imports Multisim Live designs ahead of that product's retirement on September 15, 2026. It is the only browser tool that opens .csim, .ms14, and .msjs files, and it rebuilds the schematic with wiring, placement, net labels, probes, and simulation settings intact.
Classroom licensing adds seat assignment, anonymous student seats, and private student work.
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PROTO
Learn electronics by using examples in PROTO application, and try many components available in our application. You can use resistors, diodes, transistors, and much more. Observe signals on a channel oscilloscope and analyze them with ease. During simulation, you can check voltages, currents and many other variables. Check signals on the multichannel oscilloscope and tune your circuit in real-time. Our app can greatly help with your Raspberry Pi, Arduino or ESP32 project. You can also use PROTO as logic circuit simulator and perform digital electronic analysis.
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TopSpice
TopSpice is a true analog/digital/behavioral mixed-mode circuit simulator for the PC. It offers the most advanced SPICE simulator in its price range, compatibility, an easy to use integrated design environment from schematic capture to graphical waveform analysis, and full 64-bit operation for faster performance and larger memory space. With TopSpice you have the choice to design from schematic drawings, text netlist (SPICE) files, or both. All design and simulation functions are available from either the schematic or netlist editor front-ends. TopSpice includes a native full-featured mixed-mode mixed-signal circuit simulator capable of simulating circuits containing any arbitrary combination of analog devices, digital functions and high-level behavioral blocks. With TopSpice you can verify and optimize your design from the system to the transistor level.
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