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Detect if the Micro Magic boat is sailing on Port or Starboard tack or heading too much into the wind.
Hall Sensors detect the strength of a magnet. I have aligned three in a row and can estimate the location of a magnet as it passes over them (in a straight line) with a clearance of, say, 5 cm. The sensors are under a plastic cover. Hall sensors are an upgrade from using reed switches which only tell if the magnet is close.
More information at www.roboticboat.uk/Microcontr...
Graupner Micro Magic
Chad Valley 4ft Ocean Fill 'N' Fun Kids Paddling Pool - 219L. Size L122, W122, D25cm.