This very low current circuit was found in the April 1995 Electronics Now magazine. The frequency should be chosen for maximum efficiency according to the small transformer used.
This circuit from a National Semiconductor manual from the 1980s shows how to use the LM388, a...
This is a circuit with a new (at the time) component released by Raytheon in 1965. The circuit uses a...
Suggested by General Electric in a 1970 documentation, this circuit makes use of some components of...