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.
Found in a Radio Electronics magazine from September 1958, this circuit has an LDR powered by the...
This circuit is from the Philips integrated circuits manual of 1990. It is intended for magnetic...
This circuit was found in a 1977 magazine, but it can be easily assembled today using BC548...