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 was found in documentation from the 80s. It is based on unijunction transistors not...
This circuit was found in the May 1982 issue of Radio Electronics magazine. The circuit inverts the...
This alarm is designed for doors and windows, but nothing prevents it from being used in cars,...