iCircuit 4+

Experiment with circuits

Krueger Systems, Inc.

    • 4.7 • 165 Ratings
    • $12.99



Now with Arduino simulation!

iCircuit is the easiest way to design and experiment with circuits. Its advanced simulation engine can handle both analog and digital circuits, Arduino microcontrollers, and features realtime always-on analysis. It is the perfect companion to students, hobbyists, and engineers.

You use it as you would any CAD program: you add elements, connect them together, and set their properties. But iCircuit is unlike other CAD programs because it is always simulating. It's just like working with the real circuit. You do not stop to take a measurement or spend a lot of time configuring reports. Instead, you just play with the circuit as you normally would, with the power on!

There are over 30 elements you can use to build your circuits. The app has everything from simple resistors, to switches, to MOSFETS, to digital gates.

The app features a multimeter that you use to probe around the circuit to instantly read voltages and currents. If you want to see how a value changes over time, then you can add values to the built-in oscilloscope. The scope can simultaneously track many signals over time and features a variety of automatic modes that make it easy for you to grasp the behavior of your circuit.

You can even export your circuits and PNGs, PDFs, and SVG files so that they are easy to include in reports or web sites. Scope data can even be exported for offline analysis.

Supported elements include:

• Arduino simulator! Write Arduino code right in iCircuit to create advanced microcontroller-based designs.
• Signal generators, Voltage sources, and Current sources
• Dependent sources and sources from equations
• Resistors, Capacitors, Inductors, Potentiometers, Regulators
• SPST/SPDT DPST/DPDT Switches, Configurable Relays, and Transformers
• Diodes, BJ Transistors, and MOSFETs
• Speakers, Microphones, Buzzers, DC Motors, and LEDs
• Op-amps, ADCs, and DACs
• Logic gates: AND, OR, NAND, NOR, XOR
• JK and D Flip-flops
• 38 7400 series digital parts
• 78xx and LM317 voltage regulators
• 7-segment display and driver
• Antenna with simulated AM and FM signals

I hope you love the ease of simulating circuits with iCircuit!

What’s New

Version 1.11.3

* Fix rendering the scope on non-English devices
* Fix labels and other text with non-English characters
* Fix layout of switches to fit the grid
* Allow up to 128 ports in subcircuits (32 used to be the limit)
* Fix app crash with large circuits

Ratings and Reviews

4.7 out of 5
165 Ratings

165 Ratings

someguyALSO ,

My Favorite Mac App

EDIT: Folks leaving exremely negative feedback don't know how to use the app. I sure with the author would look at adding more features.

I'm an EE and have worked with tools from major EDA vendors and have already commented to the author that he's close to something really awesome.

I use the realtime simulation capabilities @ 3Mhz daily. Analog and logic domain interaction is well implemented and it works well enough to do medium complexity mixed signal analaysis.

The simulator even handles diode/inductor chua type chaotic scenarios mostly gracefully.

I've yet to try Arduino emulation but have used other TTL/74xxx type modules frequently and have implemented a 555 and variable bit-width 'bit slice' type ALUs with the logic gate primitives that include latches.

Most tool limittions can be overcome with work arounds and the developer is open to working with cusomters with well reasoned feature addtions and change requests.

Oxilumin ,

This is extremely basic tool with fancy UI and almost nonexistent real life application

Got fooled by the nice UI and thought I could use it instead of free ltspice (or other similar open tool).
Apparently this tool doesn't go beyond sleek UI even in the most basic and trivial capabilities.
You have to use equivalent schematic for every single passive because it doesn't have a concept of even such trivial things as parasitic resistance/capacitance/inductance (which seems so trivial to implement - I wouldn't think it is not available here). Let alone - parametrized models for semiconductors, not even reverse breakdown for diodes. Now modelling passives is annoying but reasonably feasible, modelling semiconductors is something is something you wouldn't even consider doing, especially when they have proper spice models and can be simply plugged in into any proper software.

Giving it 2 stars instead of one just because it is a nice visual tool for school students to explain basics of how elements work and give ability to create some "ideal world" schematics in a nice UI.

atheken ,

UI Needs work

I have bought this app for ipad and mac. The basic functionality is there, and I really like the visualization of current flow when a circuit is completed, but all of the UI interactions feel really hard to use, a few examples:

The marquee (selection) mechanism should have the option of a bounding box, the "draw a selection" behavior goes against decades of muscle memory (not to mention the polygon "winds", making a selection action that much worse).

The fields for modifying a component's properties don't appear to be linked in a focus ring, and therefore I can't tab between them.

Selecting a bunch of components and then dragging causes wiring to get messed up. Most of the time, I'm just trying to clean things up, but this results in the digram junctions changing.

The forward-delete (on a fullsized keyboard) doesn't work to delete, only the delete key.

On ipad, the toggling between draw and delete modes is extremely frustrating, for example, adding a component, but then, tapping on it causes it to be deleted if you've left the delete mode enabled.

These apps aren't cheap, and I bought the Mac version because I hoped the keyboard/mouse interactions would make things easier, but honestly, the UI is almost more frustrating than on iPad.

App Privacy

The developer, Krueger Systems, Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


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