This is a simple circuit to control a set of lamps from 3 different points. We found it in an old Popular Electronics.
This circuit was found in a 90s Silicon Chip documentation. The current of the transformer is 1 A maximum,...
This version of the traditional debounce circuit was found in a 1964 documentation. The circuit...
This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today....