Described in an article in the March 1979 issue of Radio Electronics magazine, this generator was used in an audio test station. The frequencies are given by the capacitors.
This circuit was obtained from an English magazine from 1977. It is a toy musical instrument that...
The presented circuit uses common transistors that can be the BC549. The maximum amplitude of the...
This is the receiver for the previous circuit, also found in 90s Radio Electronics. The circuit...