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 is a simple solution for old vehicles that do not have this feature, having been found in a...
Taking advantage of the high input impedance of the operational amplifier 741 and its high gain, we...
An interesting possibility of use for the 555 CMOS is as a low consumption LED flasher, as shown. In...