This circuit is a continuation of the previous one, serving as a protector against overloads in amplifiers. The circuit was published in an article in the magazine Radio Electronics in January 1985.
This well-known configuration that appears elsewhere on the site is from an English documentation. In it,...
We found this simple operating tester 741 in a European publication in 1991. The circuit...
Found in Radio Electronics, this circuit doubles the voltage of the 117V power grid to activate...