Found in a Motorola documentation from the 70s, this circuit makes use of transistors of the time. Modern equivalents can be used. The diode also supports an equivalent.
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...