Calling all DIY electronics geeks! iCircuit by Krueger Systems is a great little app for Mac, iPhone/iPad, Android, and Windows Phone that lets you work on your theremin circuit designs from anywhere!
With a huge library of available components to choose from, iCircuit is a virtual prototype board at your fingertips. Choose from digital or analog components, ICs, MOSFETs, and more to build your circuit. Use the built-in virtual multimeter and oscilloscopes to measure signals at any point in the circuit. Since iCircuit is always simulating, there's no need to compile or run a simulation on your circuit... signals are always available! While you're editing, handy tips warn you of dangerous or invalid circuit conditions.
Here's a simple example LC tank (the heartbeat of an analog theremin circuit) made with iCircuit along with a snapshot of the waveform it produces:
iCircuit is available on all major phone and tablet platforms as well as Mac:
