Found in a Popular Elecronics from the 90s, this circuit appears in other versions in this section and on the website. The circuit draws one of 10 LEDs and has a sound effect produced during the draw.
Two or more 4013 can be cascaded to perform a divide-by-4 (-8, -16, etc.) as shown here. The...
This circuit was found in the June 1990 issue of Radio Electronics magazine. The maximum current is 1...
These circuits were found in the February 1995 issue of Electronics Now magazine. The circuits have...