This timer for long time intervals is from the 1990 Motorola Linear Databook. The setting applies to other operational ones and component values are given below the diagram.
Found in a 1970s RCA documentation, this circuit generates signals according to the component...
This circuit was obtained in an 1975 English publication. It is a voltage regulator circuit for...
Found in a 90s 73 magazine for radio amateurs, this circuit makes use of common operational...