This is another of the Star Trek red alert circuit that you can find on this site. We took this version from an English publication from the 80s.
This circuit uses an optical coupler to indicate a phone call through a lamp. The circuit is from...
The LM320 is a negative voltage regulator up to 15 V with maximum current of 1 A. In this circuit we...
This circuit was obtained in a 1986 documentation consisting of an active frequency divider for...