In the diagram from the November 1999 Electronics Now magazine we have the way to improve both the gain and the stability of the LM386 amplifier.
This circuit is used to obtain the synchronized activation of a mechanical battery clock. The...
ON Semiconductor Phototransistor Output Optocouplers Available from Mouser Electronics is the...
Found in an Electronic Design from the 80's, this circuit monitors a three-phase line, activating a...