We find this circuit in an Electronic Design of the 90s. The used integrated circuit admits equivalents and next to the diagram are given the formulas for the calculation of the components used.
A high level on the input of this circuit causes the trim voltage adjusted output voltage to drop to 1.2...
We found this alarm in a 1992 documentation. The circuit has several timings and the relay can...
This windshield wiper interval switch was found in the April 1990 issue of Radio Electronics...