Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent semiconductors. With the indicated components the load can be a lamp up to 1 A.
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...