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243_MasterPieces_04b.qxd  4/18/03  7:08 PM  Page 197





                                                                               PneumADDic II • Masterpiece 4   197
                    Dual Motor Switch Step 9
                                                   The differential we are
                                                   building here allows us
                                                   control the pneumatic switch
                                                   and the pneumatic pumps
                                                   while only occupying a single
                                                   RCX motor output.
















                                 Dual Motor Switch Step 10
























                                Dual Motor Switch Step 11
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