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.
The basic component of this circuit is a general-purpose SCR. The voltage is according to the...
This circuit came out in a publication called Electronics Handbook of 1993. The circuit shows how...
One flip-flop of the 4018 can be used as a frequency divider or counter as shown here. Frequency...