Russell McMahon paradise.net.nz> writes: > > showed her how a fridge door seal works... :) > But, the door seal probably has a crystal lining over the magnets. Don't the magnets and the crystals have FCC IDs ? The magnets are radiating an intended electromagnetic field with a frequency of at least 1/86400 Hz [1] and the crystals must be receiving and annihilating this field, thus being intentional receivers. Peter P. [1] There are 86400 seconds in a standard day -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist