iCircuit 4+

Experiment with circuits

Krueger Systems, Inc.

    • 4.7 • 211 Ratings
    • $12.99
    • Offers In-App Purchases



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 300 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:

• 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

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

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

What’s New

Version 1.13

New elements:

NeoPixels and NeoMatrix
Transmission Lines
Power Supply Jack
Mono (TS), Stereo (TRS) and Headphone (TRRS) Jacks
PCA9685 PWM Board
SCP1000 Pressure Sensor
Strain Gauges
MPU6050 Accelerometer and Gyroscope
AD5204 and AD5206 Digital Potentiometers
TSC7432 Color Light-To-Digital Converter
New capabilities:

Added the Arduino SPI library
Added the Arduino NeoPixel libraries (from Adafruit)
Added the Arduino EEPROM library
Added the Arduino Adafruit_PWMServoDriver library
Added the Arduino String library
Added the Arduino Keypad library
Photoresistor and Photodiode LED sensitivity
Series 7400 input voltages depends on VCC
Support for SPI and I2C with PIC16F877A
Support for SPI with Arduino (Master mode only)
Calculate light frequency and wavelength in LED infos
Show Internal Ports Voltages as Wires does
Persistant Arduino EEPROM memory

Fix PIC16F877A possible issues
Fix Internal Port bugs
Enable the Capacitor Loop warning (capacitor with no resistance)

Ratings and Reviews

4.7 out of 5
211 Ratings

211 Ratings

BB From Waltham ,

Best circuit simulator available.

I’m an electronics technician, with 41 years of experience in the industry. This app is nothing short of fantastic! This is perfect for students, techs, and engineers at all levels. The basic program is fine for most techs and hobbyists. Engineers and more advanced people would be interested in the pro version.

The latest version, 1.12, includes many requested updates to the interface, and more components. This is a very large update to this application. Thanks to the developer.

As other reviewers have noted, I have tried other simulators, but I keep coming back to iCircuit.

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., 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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