Adjustable Tone Generator

Project Number: 110

OBJECTIVE: To show how resistor values change the frequency of an oscillator.

Description: Turn on the slide switch (S1); the speaker (SP) will sound and the LED (D1) will light. Adjust the adjustable resistor (RV) to make different tones. In an oscillator circuit, changing the values of resistors or capacitors can vary the output tone or pitch.