This circuit that draws 1 out of 8 LEDs was found in an 80's American documentation. The circuit can also work with an astable using the 555 instead of the 4046 which is not a common component today.
This siren configuration found in a documentation from the 1980s can also be seen in many of our...
This circuit was found in an Electronics Now of the 80s applying to NiCad batteries of the time....
The purpose of this interesting circuit found in a 1977 documentation is to complete the last...