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Icircuit Cc

iCircuit recently appeared on Apple’s App Store, offering a basic schematic editor, plus circuit simulator with multimeter, and oscilloscope views. Per the app’s description -

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 SPST/SPDT relays
  • Diodes, BJ Transistors, and MOSFETs
  • Speakers, Buzzers, and LEDs
  • ADCs, and DACs
  • Logic gates: AND, OR, NAND, NOR, XOR
  • JK and D Flip-flops

I gave the app a quick spin on the iPad, and it definitely shows a lot of potential. The simulator had a tendency to lag a bit behind my realtime changes to the schematic, and the UI took some getting used to, but for $10 it sure beats the mobile simulator competition (which is pretty much nonexistent, to my knowledge).

In any case – a handy tool to have around when away from the lab. As the developer notes, the software is rather CPU-intensive so newer devices are recommended (iPhone 3GS or later). iCircuit on iTunes

For a very similar Java applet, check out Paul Falstad’s Circuit Simulator Applet.

Collin Cunningham

Born, drew a lot, made video, made music on 4-track, then computer, more songwriting, met future wife, went to art school for video major, made websites, toured in a band, worked as web media tech, discovered electronics, taught myself electronics, blogged about DIY electronics, made web videos about electronics and made music for them … and I still do!


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