This circuit generates damped sounds imitating a drum or other percussion instrument with alteration of the double T components. We find it in an old American documentation.
This circuit accelerates the tripping of a relay when energized. The circuit uses the CA3018...
The circuit shown is from the National Semiconductor 1994 Linear Applications Handbook. The base...
This ultra-simple circuit has the frequency determined by the LC network. Any general purpose JFET...