Electronic fuse

electronic fuse It is perfectly understandable why many a constructor is in a cold sweat when faced with the decision whether or not power may be ap- plied to his circuit board or ex- perimental set-up at a more or less advanced stage of completion. Even after the closest inspection of the rel- evant circuit, sheer experience has taught many of us to be wary of calmly curling smoke signals from quite unexpected PCB locations, along with a sudden and violent ac- tion on part of the ammeter in the supply line, often followed by rapid 76 overheating of the power supply series regulator and blowing of a fuse, all of which typically take place before the mains switch can be reached to prevent further damage from being inflicted upon power supply and/or expensive parts in the circuit under test. Murphy strikes again! Some of the above-mentioned plight may be alleviated by this circuit, which functions as a resettable, non- destructible fuse replacement for series connection in the posit...