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 got this circuit from Radio Electronics from July 1990. The circuit mimics the sound of the red...
We found this basic circuit of a relaxation oscillator with unijunction transistor in a 1976...
We found in an old documentation how to use a 555 as a monostable key. The circuit should not be...