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.
I found this circuit in an old Argentine publication from 1973. The components are no longer...
This circuit uses a CMOS integrated circuit as a basic element and can be combined with the...
This amplifier was found in a 1957 Rayrtheon documentation. The circuit can be fitted with a BC558...