This circuit was found in an Electronics Now from the 90's. The integrated regulator circuit and the power transistor must be equipped with heat radiators.
This circuit uses separate sources for the power supply and the operational stage. The output...
This is the well-known lightning lamp that was published in the March 1988 issue of Saber...
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...