This circuit was found in a 1977 documentation. With it we have the direct indication, through LEDs of an ASCII signal. The circuit must be powered by a voltage of 5 V.
The integrated circuit used is not common today. The circuit is from the SGS linear integrated circuits...
This circuit was obtained in a 1998 documentation. It is a small low frequency signal generator with...
This circuit turns off after a time that depends on C1. The circuit is from an Electronics Now...