Editors' Note: The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
iCircuit is the premier iPad and iPhone app for designing and experimenting with circuits. 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 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 touch interface to control the total time displayed and stacked and unstacked modes to easily compare signals.Supported elements include:* Signal generators, Voltage sources, and Current sources* Resistors, Capacitors, and Inductors* Manual SPST/SPDT Switches, and Relays* Diodes, BJ Transistors, and MOSFETs* Speakers, Microphones, Buzzers, DC Motors, and LEDs* ADCs, and DACs* Logic gates: AND, OR, NAND, NOR, XOR and 74XXX parts* JK and D Flip-flops* 7-segment display and driverATTENTION Because iCircuit is a very CPU intensive application, it is recommended that you only use it on newer generation hardware including: iPhone 3GS, iPhone 4, and iPads. However, it will still function on the older hardware.
What's new in this version:
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 flippe... See all new features »