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Some educational java applets to help visualize various concepts in math, physics & engineering.

Analog Filter Applet

This java applet is an electronic circuit simulator that displays thefrequency response of circuits. When it starts up, it displaysa simple high-pass filter. You can adjust the cutoff frequencyusing the slider on the right.The "Circuits" menu contains a lot of other sample circuits for you to try.

Java plug-in.