One-IC two-tones Siren with IC 4093
Saturday, September 8th, 2007
Double-tone Police sound
Single-tone old ambulance sound
This 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. With SW1 positioned as shown in the circuit diagram, the typical dual-tone sound of Police or Fire-brigade cars is generated, by the oscillation [...]
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