Two-tone-siren


Posted on Apr 4, 2012

This siren provides a constant audio output, but alternates between two separate tones. The LM13080 is set to oscillate at one basic frequency;


Two-tone-siren
Click here to download the full size of the above Circuit.

this frequency is changed by adding a 200-K!l charging resistor in parallel with the feedback resistor, R2.




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