This circuit uses a capacitor that depends on the frequency of the crystal. We found it in a 1967 documentation. The maximum frequency is around 100 kHz.
This simple circuit imitates the sound of a machine gun and, when using a larger capacitor, a...
This sweep oscillator was found in 1980s American documentation and can be assembled with current...
This mono circuit for 10 LEDs was found in the January 1991 Radio Electronics magazine. It is...