Introduction to Circuits and Electronics

Mesh Analysis for DC Circuits

Tutorial useful for "trying to understand how to do loop analysis and factor current sources into the mix" (Will Clayton).

Voltage Circuit Simulator

Silly Ohm's law simulator: select the right resistors to get the light bulb to not explode.

Alan Felzer's Computer Demos for Electrical Engineering

Many short demonstrations of simple circuits: resistors, op-amps, capactors, inductors, and logic components. These are either in the form of "worked problems" or examples where you can turn on and off individual changes.

Cuthbert Nyack's

Interactive demos for individual components and common combinations (RC, RL, and RLC circuits). Further down there are PSPICE demos available for more tinkering.

Fu-Kwun Hwang's RC Circuits Page

See the evolving voltage and current behavior of a simple RC circuit with controllable switch.

RLC Resonance Circuit

Play with difference values of R, L, and C in a simple RLC circuit as a filter (frequency domain).

Impedance of Series RLC circuits

Another RLC circuit simulator with multiple views (sinusoidally driven).

CMOS Gates Demonstration

Turn on and off CMOS gates to understand how they work, alone and in many examples.

RLC Circuit Simulation

Clever, 3-D visualization of the transient response of a simple RLC loop circuit that you design.

The Semiconductor Applet Service

Physical-level, interactive demonstrations of the behavior and processes of various semiconductor-based components. Also note the additional links at the very bottom.

Circuit Builder Simulation

Extensive general applet to build your own circuits with basic components and see the results. Though, you'd be better off using SPICE.