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CMOS Chip Warble Tone Siren Circuit

2017-08-15 11:26  
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Complementary metal oxide semiconductor (CMOS ) is a technology for constructing integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logiccircuits.This circuit uses a CMOS chip and a VMOSFET amplifier for 6 W of audio output. 18 W of audio can be generated using a 24-Vdc supply. IC1A and IC1B are used as a 1-Hz oscillator. IC1C and IC1D form a 1-kHz multivibrator that is gated by the 1-Hz signal from IC1A and IC1B.This circuit provides a good siren noise suitable for warding off robot-predators.Change the pitch by adjusting R2, and R5.all resistors are 5 or 10 percent tolerance, 1/4-watt all capacitors are 10 percent tolerance, rated 35 volts.

6W Warble-Tone Siren