Found in American documentation from 1969, this circuit switches signals with a FET of the time. The circuit can be implemented with modern equivalent transistors.
In the figure we have one of the many ways to program the counting of a 4017. The circuit uses...
We found this circuit for vocal effects in the September 1990 issue of Radio Electronics magazine. The...
This TTL module can be used in counter and many of them can be cascaded to counts up to 99, 999,...