This flashing allegory with 555 integrated circuits was found in the Radio Electronics Experimenter magazine from 1989. It is a simple circuit to assemble.
With 3 flip-flops (which correspond to 1 integrated and a half) we can also make a divider by 8,...
This project was found in a documentation from 1980. It is a central of sound effects, a simple...
This circuit is from American documentation from the 1980s. FETs support modern equivalents. ...