This damped oscillator that mimics the sound of a gong was found in 90s American documentation. The circuit signal must be applied to an external amplifier.
Although indicated in the original publication of the 1980s as a capacitance switch, the circuit...
This circuit was obtained from an English magazine from 1980, but as it uses components that can...
This configuration that appears elsewhere on this site was found in a Popular Electronics of the 1980s. The...