This circuit was suggested by National Semiconductor in one of its manuals. The LM108 integrated circuit, uncommon nowadays, can be replaced by an equivalent. The power supply must be symmetrical.
This circuit is from an American publication from 1974. It, at the same time, limits the intensity of...
This two-relay circuit gives drive logic that is clear when analyzing the circuit. In the original...
12 V battery chargers provide higher unregulated voltage. With the regulator shown, obtained from...