We found this circuit in an American publication from 1977. The circuit drives two LEDs according to the control of the inputs. The technology is TTL requiring 5 V to power supply.
This circuit with transistors from a 1995 publication. The circuit is powered by a voltage taken...
Found in a 90’s American publication, this circuit has a voltage gain close to 1, as shown in the...
In the figure we show how to use a small Hartley oscillator as a continuity tester. The component...