Patent ID: 8760250

Claim:
A method comprising: forming a structure that includes multiple first magnetic sources having at least two polarities and disposed on a first side of the structure, the first side of the structure being substantially flat, the multiple first magnetic sources including multiple magnetic elements magnetically printed into a piece of magnetizable material by positioning a hole of a magnetizing print head adjacent to the piece of magnetizable material at each location where the multiple magnetic elements are to be magnetically printed and applying a current to the magnetizing print head that generates a magnetizing field having a high magnetic flux density in and/or near said hole of the magnetizing print head and a low magnetic flux density elsewhere, the multiple first magnetic sources including at least one magnetic source having a first polarity and at least one magnetic source having a second polarity, the multiple first magnetic sources producing one or more first magnetic fields at the first side; providing at least one conductive coil that is capable of interacting at least with the one or more first magnetic fields; and constructing an apparatus that enables the structure and the at least one conductive coil to move relative to each other such that the at least one conductive coil is able to interact at least with the one or more first magnetic fields based at least partly on a relative movement between or among the at least one conductive coil and the structure.