This circuit was found in an Electronics World of 1968, making use of components of the time, not common today. The power supply is not provided.
This circuit can be interleaved between guitars and guitars to give the fuzz distortion effect. The...
This transceiver circuit was found in a 1997 documentation. The circuit operates in the 80 meters...
This circuit uses a GE optical coupler. Equivalents can be tried. The circuit is from the GE...