This circuit has its frequency controlled by a 1MHz crystal. The circuit must be powered by a voltage of 5V. The capacitors must be ceramic. The generated signal is rectangular.
Found in American documentation from the 1990s, this circuit causes the fuse to blow in the event...
This circuit can function as a light alarm by changing the sound when light falls on the sensor....
This hybrid audio amplifier from National Semiconductor was found in the June 1994 issue of...