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 oscillator makes use of one of the inverters of an integrated circuit 7404. With circuits of the...
This circuit provides a constant current of 1 mA, stabilized by an LED, which can be equivalent to that...
We found this circuit in an American documentation from the 90s. The consumption is only 1 uA in...