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.
Found in a 90s 303 Circuits, this circuit aims to provide a soft start for a low voltage halogen lamp....
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
Any TTL inverter can be used in this circuit. We found it in documentation from the 80s, but it...