We found this circuit in a 1965 Electronic Design. Transistors are still common but admit equivalents for some of them. The circuit drains a current of only 4 mA.
We found this circuit in the National Semiconductor Audio Handbook of 1977. The circuit produces...
This is the traditional configuration of a 6 or 12 V source with 7806 or 7812 integrated circuits, for a...
This simple circuit was found in an English magazine that no longer exists, January 1970 issue. This...