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 a 1977 Radio Shack documentation. The circuit should be powered, for...
Found in American documentation from the 90s, this circuit uses a GASFET of the time. The circuit is...
This circuit generates pulses when the light beam incident on the phototransistor is interrupted. The...