Using an integrated circuit that was available at the time, this circuit produces animal sounds such as mooing, rooster crowing, etc. The circuit is from a March 1997 Electronics Now magazine.
This voltage-controlled oscillator was found in a 1965 Electronic Design. Transistors are from the...
Found in an American publication from the 50's, this circuit uses input and output coup-ling...
This circuit is from a magazine 73 for radio amateurs of the 90s. The circuit generates the high...