This bistable circuit that drives a relay with a pushbutton was found in the March 1pp6 issue of Electronics Now magazine. A common bipolar with a 1k resistor at the base can be used in place of the FET.
This simple CMOS circuit generates two-frequency signals for use as a signal injector. The circuit...
In the figure we have a circuit that produces interval pulses, reproduced in the piezoelectric...
Found in 90's Electronic Engineering this circuit can be used to measure phase angles between two...