An ordinary-looking Sharpie dances at your command.
Photography by Sam Murphy
Using a small battery, a magnetic reed switch, and a miniature pager motor, this device will fit concealed inside a fine-point Sharpie pen. When a magnet is drawn near, the contacts on the reed switch close, making the Sharpie dance and vibrate on a table. I call this device the Telekinetic Pen.
The entire device can be built in an hour or two, with only a couple of soldered connections and a little work with hand tools. You can even “prove” ...
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