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Sine Wave Generator

A simple sine wave generator based on a Wien bridge configuration of resistors and capacitors. Both voltage and frequency are variable.

What is L1, you ask? Why, it is a simple flashlight lamp.

Why doesn't it light up, you ask? Why, because it is used as a continuously-variable resistor. It serves as the feedback control component by changing the current it passes as the circuit tries to drive the frequency away from the setting you've selected.

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Taken on November 10, 2008