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PICAXE
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Tip #0 Rare Earth Magnets
•Magnets are used to activate reed switches and for many other things on our railroads
•Two super sources:
–http://www.dealextreme.com/details.dx/sku.5962  (20 @ 10mmx1mm for $2.69 delivered)
–http://kjmagnetics.com/ for just about any size / shape / strength you might need