iCircuit 4+

Real-time circuit simulator

Krueger Systems, Inc.

Designed for iPad

    • $17.99
    • Offers In-App Purchases



iCircuit is the premier iPad and iPhone app for designing and experimenting with circuits and Arduinos. Its advanced simulation engine can handle both analog and digital circuits 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 300 elements you can use to build your circuits. The app has everything from a programmable Arduino, to 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 touch interface to control the total time displayed and stacked and unstacked modes to easily compare signals. The scope can also display the Fourier transform of any signal so that you can see the performance of filters.

Supported elements include:

• Programmable Arduino using a subset of the C programming language
• Programmable PIC controllers using assembly language or hex files
• Signal generators, Voltage sources, Current sources, and Dependent sources
• Resistors, Capacitors, and Inductors
• Manual SPST/SPDT and DPST/DPDT Switches, Push buttons, and Relays
• LEDs, Diodes, BJ Transistors, and MOSFETs, Thermistors
• Triodes and tetrodes
• Audio simulation with Speakers, Microphones, Buzzers, and LEDs
• DC Motors and Servos
• ADCs, and DACs
• Logic gates: AND, OR, NAND, NOR, XOR
• JK and D Flip-flops
• 180 digital ICs from the 4000 and 7400 series
• 78xx and LM317 voltage regulators
• 7-segment and matrix displays
• Antenna with simulated AM and FM signals

You can also create sub circuits to introduce new elements and componentize your designs.

No matter your skill set, you'll be playing with circuits in no time with iCircuit.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

What’s New

Version 1.12.2

Version 1.12.2 improves subcircuits and contains all the new features and bug fixes from the big 1.12 release:

New elements:
* Diac and Triac
* Varactor and Memristor
* 7401, 7403, 7409, 7411, 7412, 7413, 7415, 7418, 7419, 7420, 7421, 7422, 7424, 7425, 7426, 7427, 7428, 7433, 7434, 7435, 7436, 7439, 7442, 7443, 7444, 7447, 7449, 7450, 7451, 74L51, 7453, 74H53, 7454, 74H54, 74L54, 7455, 7456, 7457, 7458, 7460, 7464, 7465, 7470, 7471, 74H71, 7472, 7473, 7475, 7476, 7477, 7478, 74LS78, 7480, 7481, 7482, 7483, 7484, 7487, 7489, 7491, 7492, 74100, 74101, 74104, 74105, 74107A, 74108, 74109, 74110, 74112, 74113, 74114, 74116, 74118, 74125, 74126, 74128, 74131, 74132, 74133, 74134, 74135, 74136, 74138, 74139, 74140, 74170, 74224, 74244, 74245, 74540, 74541, 744067, 4006, 4008, 4009, 4010, 4012, 4013, 4014, 4015, 4016, 4018, 4019, 4020, 4021, 4022, 4023, 4024, 4025, 4026, 4027, 4028, 4030, 4031, 4032, 4038, 4040, 4041, 4042, 4043, 4044, 4049
* Servo motor
* LED Matrix
* Spark gap and tunneling diodes
* H-Bridge (L293)
* LM358 VCO
* Triode and Tetrode
* Internal Ports
* Buffer and tristate buffer
* Ten segment LED bar graph
* Internal ports

New capabilities:
* Wire colors with controllable thickness
* Over-voltage warning on ICs
* Over-power ratings on resistors
* Rotate command to quickly re-orient elements
* Support for expressions on Resistor
* Improved support for Arduino structs and arrays
* Added the Arduino Servo library
* Resistance, Frequency, RMS, PP, Min and Max Voltage measurement mode on Gauge

* Better contrast in the element popup editor
* Dark mode and light mode can now be automatic or manual
* Fix low Ohmic potentiometers
* Official symbol for MOSFETs

Ratings and Reviews

3.9 out of 5
17 Ratings

17 Ratings

Rivendell Research ,

iCircuit App

This app is fantastic, but unfortunately falls short of what it could be, in my opinion. Many have requested, and continue to request, the inclusion of a vacuum tube module for this App. From my understanding, that request has been ongoing for the better part of almost a decade. Again, this is only one user’s opinion, but this will never be a well rounded App until at least this feature is included, and with the same professional approach applied to the existing App.

SLIcore Jim ,

This is a really good app... take a little time to learn how to use it

I am not an electrician or electrical engineer (are they the same? 🤷🏼‍♂️). I picked this up cuz it says for beginners and hobbyists too. There is a learning curve but that’s more to get used to how the app was intended to be used. This company clearly puts A LOT of work into this app and they are clearly listening to the feedback they have been provided and it shows. There are a bunch of symbols to build your circuits. Yes, you probably will find some components have been left out, but from the sounds of things, people are getting by. Folks are building some crazy things out there! The interface is really intuitive so they aren’t lying to you when they say you’ll be working on it in minutes. I found that the spots where I was stuck just ended up turning into another learning experience.

I would definitely suggest trying iCircuit out. There is a free version, so you can find out if you have the patience or time for it.

Lastly: for anyone who really didn’t enjoy the app, temper your review a bit. If you really think they missed the mark with iCircuit, BUILD YOUR OWN APP! Show us how it should be done.

Okay, rant over. Go iCircuit!

TinhornNinja ,

Amazing resource for EE undergrad

Absolutely fantastic resource for testing simple circuits. interface is a little jankey at times, and the power consumption is abysmal. But a very useful app for getting through my undergrad courses.

App Privacy

The developer, Krueger Systems, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer's privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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