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.

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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 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. ★ Big improvements to performance and visual quality of circuits on all devices. Now takes full advantage of retina displays! ★ DC Motors, Relays, 74XXX, and 78XX elements have been added. ★ User interface and gesture changes to be more like other iOS apps.

★ Simulation bandwidth limit removed and the maximum size of circuits has increased. ★ Scope has a new cursor to examine values, can be scrolled back in time, and can export its data. FIXES ★ Measurement of voltage drops across elements can now be flipped in the meter ★ Bugs that occurred while changing orientation with the full screen scope have been fixed.

★ Improved the size of element icons in the parts drawer to be easier to add to circuits. 1.2 Apr 3, 2011. New Features. Two finger dragging to replace the Pin The Pin was an experiment in UIs to help you manage editing the circuit and panning around with just one finger. But that experiment has caused a lot of frustration in you the users.

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ICircuit now uses 2 finger panning so you can quickly toggle between editing and panning using just your hands. This is only available on iPads and iOS 4 devices and can also be disabled if you love the Pin. Non real-time simulations The circuit is still 'always on' but now you can control the bandwidth of the fixed time step simulator to guarantee accurate results. 555 Timer, Potentiometers, and Text Labels Thanks to your feedback (support@kruegersystems.com), two new elements have been added. The 555 should be great fun for students. External display (VGA) output on the iPad Now you can hook the device up to external monitors, TVs, or projectors to share your circuits with an audience.

RMS, Peak-to-peak, and Frequency now displayed in the scope. 5 new examples thanks to Mike Acton A dedicated user was kind enough to donate a bunch of circuits to making the Examples folder even more interesting.

Tips on how to use the app can now be accessed form the Home screen This is a large app with a lot of features. Tips are now here to speed up the learning process. You can also access these tips at Bugs Fixed. iOS 3.1 crashes and bugs have been fixed There were a variety of errors encountered by users when using iCircuit on 3.1 devices, these have all been fixed. Better bounds checking on inputs (circuit size for instance) to prevent crashes. Failing circuits no longer cause the app to fail to launch. Send feedback button has been fixed on iPhones.

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Performance improvements. 1.0 Jul 28, 2010. Creynol5, A few changes would make this app perfect. Bought this app years ago and started using it again when some of my more “professional” spice programs failed to work with some of my circuit designs. I use Multisim, TINA, QUCS, LTSpice and every circuit and iCircuit handles my designs better than ALL of them!

Obviously it doesn’t handle real components like some of the other programs, but for prototyping it holds it’s own with any of them (some of these programs are professional tools costing hundreds to thousands of dollars). There are things that could be improved.adding a trigger mode or two other than roll mode for a start would help.

Also adding a frequency sweeping option to the sources would make better use of the frequency domain measurement mode. Creynol5, A few changes would make this app perfect. Bought this app years ago and started using it again when some of my more “professional” spice programs failed to work with some of my circuit designs. I use Multisim, TINA, QUCS, LTSpice and every circuit and iCircuit handles my designs better than ALL of them! Obviously it doesn’t handle real components like some of the other programs, but for prototyping it holds it’s own with any of them (some of these programs are professional tools costing hundreds to thousands of dollars).

There are things that could be improved.adding a trigger mode or two other than roll mode for a start would help. Also adding a frequency sweeping option to the sources would make better use of the frequency domain measurement mode. Jilfe, Amendment to last review. In my last review I was very frustrated with how it was not working any more, and I thought it was because they didnt care about this app any more. This is what I wrote, then: “Used to be the best circuit simulator around, even better than the computer versions of electronics workbench.

Now it is notworking at all, very poor app. Will not work on updated versions of ipad.” HOWEVER NOW, I APOLOGISE, I was wrong in thinking you didn,t care! There is a lot of time and effort, needed to keep updating your app, to keep up with the changes in oprating systems. Shame on me to acuse you of not caring about your customers.

You DO care about keeping your apps up to date, it just takes time and resources to do that. I want to say THANK YOU, to all of you who put forth the tremendous effort to bring this app to high standards again. GOD Bless you all for your time and efforts. Jilfe, Amendment to last review.

In my last review I was very frustrated with how it was not working any more, and I thought it was because they didnt care about this app any more. This is what I wrote, then: “Used to be the best circuit simulator around, even better than the computer versions of electronics workbench. Now it is notworking at all, very poor app. Will not work on updated versions of ipad.” HOWEVER NOW, I APOLOGISE, I was wrong in thinking you didn,t care! There is a lot of time and effort, needed to keep updating your app, to keep up with the changes in oprating systems.

Shame on me to acuse you of not caring about your customers. You DO care about keeping your apps up to date, it just takes time and resources to do that. I want to say THANK YOU, to all of you who put forth the tremendous effort to bring this app to high standards again.

GOD Bless you all for your time and efforts.