This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be changed. The load depends on the relay. The circuit is old, from 1988 documentation, but totally viable today.
This circuit was found in the July 1994 issue of Electronics Now magazine. The relay can be rated...
Due to its low working voltage, this circuit of an old EDN can be associated with a...
This circuit was found in a telecommunications publication of 1978. Its purpose is to obtain...