This circuit of an EDN divides the input pulse frequency by even values. The circuit is TTL and can be used as a shield for microcontrollers.
The LM380 is not a modern component and in some cases not easy to find. But if you have one you...
We found this configuration with a logic circuit that is now uncommon in an 80's documentation. The circuit...
This circuit is used in magnetic tape recorders, having been found in documentation in the 1960s....