Found in an 1989 R-E Experimenters Handbook, this circuit produces several sound effects that can be modified. The signal must be applied to an external amplifier.
This circuit was found in an old Radio Electronics, but can still be assembled as the components are...
This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used...
This circuit for incandescent lamps was found in an American documentation from the 80s. The...