3 A switched regulator (CB8859E)

Found in a 90s Popular Electronics, this circuit provides a current of 3 to 5 A depending on the transistor.

Sequential Upand Down (CB4579E)
This circuit uses components that are still common despite being from 1995 documentation. The circuit can...
400V Neon Regulator (CB8824E)
Found in an old American documentation, this circuit uses neon lamps as a reference to obtain a...
555 Pulse Width Generator (CB25959E)
This pulse width-tuned circuit was found in the March 1996 issue of Electronics Now magazine. The...