One IC two tones SirenThis circuit is intended for children fun, and can be installed on bicycles, battery powered cars and motorcycles, but also on models and various games and toys. The typical dual-tone sound of Police or Fire-brigade cars is generated, by the oscillation.

One-IC two-tones Siren
See more details at www.redcircuits.com

 
One IC two tones Siren
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