This circuit was obtained from a National Semiconductor manual from the 1990s. The circuit employs a pair of matched transistors, and the indicator is analog.
This very low current circuit was found in the April 1995 Electronics Now magazine. The frequency...
With this circuit you can produce the sound effect passing from one channel to another. The...
This amplifier makes use of a simple 12 to 30 W source, having been found in the SGS manual of...