ELECTRONIC_WHISTLE

Published:2009/6/24 2:42:00 Author:May | From:SeekIC

The circuit shown is a twin-tee oscillator. R1 varies the pitch, R2 the duration, and R3 the for-mat (bell, rise 8u fall time, etc.). Vary R4, R5, C4 and C2, C3 for large shifts in frequency.



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