This traditional configuration with the 555 was obtained in an 80s Hands-On Electronics. The relay is of the sensitive type according to the supply voltage.
Found in American documentation from the 1990s, this simple circuit excites a LASER diode. The...
This circuit was found in an old American documentation. The integrated circuit used is uncommon...
This circuit was obtained from the February 1990 issue of Radio Electronics magazine. The circuit...