With this circuit of a Popular Electronics from the 90's it is possible to test a diode with the oscilloscope visualizing its characteristic curve. The transformer can have currents starting from 100 mA.
This converter was found in the June 1991 issue of Radio Electronics magazine. The circuit uses...
This two-transistor amplifier stage has a feedback network allowing a voltage gain between 10 and...
This circuit was found in a 1967 RCA documentation. The components are of the time. The circuit...