This circuit is from a Radio Electronics from December 1964. The components are from the time and modern equivalents for transistors and diodes can be used.
Found in a 90s Electronic Design, this circuit provides a highly stable 60 Hz sine signal for...
This circuit is from an American publication of 1977. The tunnel diode admits equivalents and the...
This robot vision circuit was published in the December 1986 issue of Radio Electronics magazine. The...