This is one of the many possible siren configurations for the 555 integrated circuit. We found it in the October 1992 Radio Electronics magazine. It has a power stage.
In the figure we have the circuit of an amplifier for alternating signals with 10 times gain,...
Frequencies up to just over 100 kHz can be obtained with an oscillator based on one of the four...
With this circuit it is possible to regulate a source of up to 9 A using 3 LM350. The integrated...