This simple circuit has good gain and can be implemented with any general-purpose transistor. The circuit is from Electronics Now, June 1997. The coil determines the frequency range.
This circuit for receivers was found in an American documentation from the 90's. The circuit...
This circuit found in an American documentation from 1964, alters the duration of a pulse and can...
In the figure we have the way of obtaining 220 V from two equal 110 V transformers or 230 V from...