This circuit protects the speaker from dangerous direct currents that could damage it. The circuit is from an Electronics Experimenter Handbook 1993 edition.
This high current regulator with low voltage drop was found in the datasheet of the used...
Found in a 1974 Ferranti transistor manual, this circuit drives a sensitive 12V relay in...
This simple source is indicated for voltage regulators of 5 A x 12 V as the one found in CB17141E. The...