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 circuit turns a relay on or off by touching the sensors or by connecting sensors at these...
This circuit is based on an integrated TIPL62 from Texas Instruments, uncommon today and an...
This small circuit for the medium or short-wave range, depending on the coil, was found in a...