WAILING_WITCH_NOISEMAKER

Published:2009/7/13 23:15:00 Author:May | From:SeekIC

Two unijunction transistors, Q1 and Q2, are connected in a dual-oscillator circuit. Transistor Q1 is connected in a very-low-frequency relaxation oscillator circuit, with C1, R1, R5, and R9 setting the operating frequency. Transistor Q2 is connected in a similar oscillator circuit that operates at a much higher audio frequency. That oscillator's frequency is set by R6, R10, and C2. Resistor R7, a 1-MΩ potentiometer, sets the mixing level of the two oscillators. By adjusting R5, R7, and R6, many strange sounds can be created.



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