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.
This interesting FET-tester circuit was obtained from an old American documentation. The bipolar...
Found in a 90s Electronic Design, this suggestion to have a higher voltage in a fixed regulator...
This circuit was found in the July 1994 issue of Electronics Now magazine. The relay can be rated...