This java applet is an electronic circuit simulator. When the applet starts up you will see an animated schematic of a simple LRC circuit. The green color indicates positive voltage. The gray color indicates ground. A red color indicates negative voltage. The moving yellow dots indicate current.
To turn a switch on or off, just click on it. If you move the mouse over any component of the circuit, you will see a short description of that component and its current state in the lower right corner of the window. To modify a component, move the mouse over it, click the right mouse button (or control-click if you have a Mac) and select “Edit”.
The "Circuits" menu contains a lot of sample circuits for you to try.
If you don't have Java, get the Java plug-in.
Index of Circuit Examples.
Zip archive of this applet. (double-click on circuit.jar to run)
Version 1.5h, posted 1/19/10
Version 1.5f, posted 1/4/10; lamp, spark gap, units, improved convergence
Thanks to J. Mike Rollins for the Zener diode code. Thanks to Julius Schmidt for the spark gap code and some examples.