@▷ Sweeping Output Frequency Siren | Diagram for Schematic

Sweeping Output Frequency Siren

This circuit is a variation of the “Two Tone” siren that is a standard for the LM555 timer. The circuit allows the output frequency of the ‘B’ timer to ’sweep’ between two frequencies rather than switching abruptly between two fixed frequencies. [...]
Read More Source: http://home.cogeco.ca/~rpaisley4/LM555.html

"Sweeping Output Frequency Siren Search Tags"
555, Audio - Alar
Advertiser