This circuit from the 90s, found in an Electronic Engineering can be used as a shield since its control is digital with TTL logic of 5 V. The components used are still common today.
This fast-acting circuit uses a 555. We found it in the November 1992 Radio Electronics magazine. The...
This circuit was suggested by Popular Electronics from the 90s. The circuit is quite simple using...
This timer for small intervals, but which can be increased with the increase of R1, was obtained in an...