Make a pickup using GeoMag parts

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GeoMag is a magnetic toy construction system. It connects together using short magnetic rods and little steel balls. Niels Kaagaard noticed the resemblance of the GeoMag rods to the pole pieces in a single coil pickup and proceeded to make a pickup out of them.  When you remove the plastic coating from the GeoMag rod you can see it is a steel bar with neodymium magnets at either end. To work as a pickup pole you need to remove one of these magnets. Niels then made some bobbins from fibreboard and wound the pickup coil around the GeoMag rods using his own hand winder. Niels reckons it sounds clear and bell like, with remarkably little electrical interference.

Link: How to make a single coil pickup using GeoMag rods