This circuit was presented in a January 1990 Radio Electronics magazine article as part of a home theater sound effects system. It consists of a 3 kHz high-pass filter.
We found this circuit in a 90's European schematic. The circuit can be implemented with almost any...
This circuit appears several times on our website and in this section, for various purposes and minor...
Among other things, this oscillator is suitable for practicing Morse code. The circuit is from a...