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Home » Categories » Electronics Sound » Siren circuits (Factory Siren,Car siren)
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Factory Siren
This circuit produces a sound similar to a factory siren.
It makes use of a 555 timer
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Police Siren
This circuit produces a sound similar to the police siren.
It makes use of two 555 timer ICs used as astable multivibrators. The frequency is controlled by the pin 5 of the IC.
The first IC (left) is wired to work around 1Hz. The 47uF capacitor i
---825
Powerful Siren
This circuit was requested by several correspondents. Its purpose was to obtain more power than the siren circuit already available on this website since many years ( One-IC two-tones Siren ) and to avoid the use of ICs.
A complementary transistor p
---826
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