This circuit that draws 1 out of 8 LEDs was found in an 80's American documentation. The circuit can also work with an astable using the 555 instead of the 4046 which is not a common component today.
Found in a 1967 Electronic Design, this transistorized circuit compresses and then expands a pulse....
We found this circuit in an English publication from the 1980s. The circuit uses current...
This shield can be used both to interface microcontroller circuits or TTTL. The resistor in series...