This circuit for musical instruments was found in a 90’s Elektor. The circuit still applies, as the components used can still be obtained with some ease.
This circuit was found in a 1974 English magazine. We can also assemble it using BC558 transistor for...
This circuit was obtained in the manual of the used integrated circuit. Equivalents may be used...
This circuit can be implemented with more modern operational amplifiers like the 741 and its...