This circuit was found in a 80s American documentation. The zener diodes determine the points of action of each stage and the transistors can be general purpose types.
This circuit was obtained in an English publication of 1975. It is a circuit that stabilizes an...
This timer for long time intervals is from the 1990 Motorola Linear Databook. The setting applies...
We found this circuit in a 90s Popular Electronics. It increases the duration of a pulse in a...