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 circuit is suggested by National Semiconductor and is based on the LM3900, a quadruple...
This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is...
Suggested by a Philips documentation from 1970, this circuit uses period components, operating at 50...