Found in an American documentation from 1969, this circuit makes use of a pair of matched transistors of the time. The circuit supports modern equivalent components.
In a microprocessor project (shield) for control applications, a triggered clock can be useful....
Another alternate action switch that uses a NAND Schmitt Gate [4093 IC] is shown here. The...
This circuit was found in a 1968 EEE and can be implemented with any current general-purpose transistor....