This 13.6 V power supply with 8 A output was suggested by Texas Instruments in the documentation of the 90s. Power transistors must be equipped with good heat sinks.
The circuit shown with the LM3914 was found in the March 1992 issue of Radio Electronics magazine. The...
The MC496 integrated circuit used in this application is not common today. Motorola's circuit...
Found in a 1960 Gernsback documentation, this circuit triggers an electromechanical counter of the...