This two-tone decoder has a bandwidth of 24%. The circuit is from a 1994 Electronics Now. The components without the value determine the recognized frequency.
This circuit was obtained from a 1968 documentation and can be adapted to use current equivalent...
This simple voltage regulator or stabilizer uses only two component and can source up to 100 mA to a...
This oscillator generates quadrature signals, that is, with a 90-degree lag. The frequency is...