Simply place the tool or object you want to magnetize inside the coil and briefly press S1. The generated single polarity field should magnetize the object if the material it is made to allow.
This circuit was found in documentation from the 1980s. The circuit can be designed based on...
This circuit uses two operational amplifiers, which can be of the type 741, in a full wave...
Other series operational amplifiers, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...