Found in a Popular Electronics from the 90s, this circuit generates signals from 2 Hz to 30 kHz in different bands. The circuit can be powered by voltages from 5 to 12 V, depending on the application.
The integrated circuit used in this configuration is uncommon today. The diodes are for general use...
This oscillator or clock generator generates rectangular signals and frequencies up to 100 kHz....
This power supply with transistor regulation was obtained in a 1995 documentation. The power...