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.
We found this circuit in the 1994 National Semiconductor Linear Applications Handbook. The circuit is...
This circuit is from an American manual from 1974. It uses a diac (Q1) and the SCR can be the...
This semi-proportional temperature control was found in old American documentation. The components are...