This circuit was obtained from an American documentation from 1976. The circuit has a dynamic range of 100 kHz. FETs may be replaced by current equivalents.
This circuit was taken from the 1974 Ferranti transistor manual. Note the shapes of the signals....
This mini siren, found in a 2003 publication, powers a small piezoelectric transducer, but a...
This fuzz effect is from a 1988 Italian publication, but it can be easily assembled, as the...