We found this circuit in an American 1980s documentation. The circuit uses a piezoelectric transducer unusual in our day. The transistor is general purpose type.
Binary Indicator (CB6700E) This circuit was obtained from old documentation but can be used as a...
This circuit uses two sensors that are placed at the intersection of a miniature railroad, causing the LED...
This delay circuit for a sound system was found in the December 1990 Radio Electronics magazine as part...