This circuit is from the National Semiconductor's Linear Applications Handbook of 1994. The circuit can be implemented with equivalent operational. The detected voltage is given by the diode.
This is the traditional configuration of a 6 or 12 V source with 7806 or 7812 integrated circuits, for a...
The circuit shown in the figure can act as a home repeater for AM signals from the output of an...
We found this circuit in a 1987 documentation. It is a multi-tester with neon lamp and LEDs...