5W Amplifier with LM383 (CB25309E)

This circuit for the car was found in the April 1990 Radio Electronics magazine. The speaker is 4-ohms.

FET Input Operational (CB13628E)
This configuration was obtained in a 1977 FET Databook. The circuit can be practically any JFET...
Negative Voltage Regulator 723 (CB5460E)
The integrated circuit used in this regulator is not very common today. The circuit is from old...
Constant Current Source II (CB19950E)
The operational used is uncommon today, but equivalents can be used. Unlike the previous one, this...