In addition to tone control, this circuit of the SGS 1982 linear integrated circuit manual has a loudness control. The supply must be made with a 24V voltage source.
Obtained from a 1980s Signetics documentation, this circuit uses a common integrated circuit at the...
This circuit that can be used as a three-tone domestic bell has a traditional configuration that...
With 3 transistors, we found this receiver in a documentation from 1966. The circuit has an output...