This two-port configuration of the 4001 was found in the April 1988 issue of Radio Electronics magazine. The timings are given by R1 and C1 as a function of the desired behavior of the circuit.
This circuit is from an old American documentation using as indicators for the flip-flops neon...
Suggested by a 1968 Philips documentation this Eccles Jordan rocker as it was called can operate...
This windshield wiper interval switch was found in the April 1990 issue of Radio Electronics...