Tham khảo tài liệu 'lego mindstorms - the unofficial guide to robots - jonathan b. knudsen part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 230 A Finding Parts and Programming Environments You can order sensors motors and other robot parts from several sources. Although you can probably find the Robotics Invention System RIS at a local toy store you ll hardly ever see extra motors and sensors. LEGO Sources Table A-1 lists three places where you can get RIS accessories. Table A-1. Sources for LEGO Parts Name Telephone Web Site LEGO World Shop - http . com LEGO Shop-at-Home Service 800 453 - 4652 - Pitsco LEGO DACTA 800 362 - 4308 http Pitsco LEGO DACTA sells LEGO s educational products including RIS a programming environment called ROBOLAB classroom packages and a fine assortment of spare parts. Parts Table A-2 lists the parts you may wish to buy along with their prices at the three sources shown in Table A-1. This information is current as of mid-1999. LWS is LEGO World Shop S@H is LEGO Shop-at-Home Service and Pitsco is Pitsco LEGO DACTA. Note that the Shop-at-Home Service does not charge extra for shipping so the list is not exactly comparing apples to apples. 231 Table A-2. Parts and Prices in US Dollars Part Item Pitsco Item LWS S@H Pitsco Robotics Invention System 9719 N979719 RoboSports expansion set 9730 - - Extreme creatures expansion set 9732 - - RCX 9709 N979709 IR cable for Macintosh - 4119830 - - 15 Light sensor 9758 N979890 Touch sensor 9757 - - Touch sensor two wire bricks - N779911 - - Temperature sensor 9755 N979889 Rotation sensor 9756 N979891 Geared motor 5225 N775225 Micro motor 5119 N775119 - Standard motor 5114 N775114 - Train motor 5300 - - - Remote control 9738 - - Electric plates 5037 N779886 - Wire brick 128 cm 5111 - - - Wire brick set - N779897 - - Large turntables - N779876 - - Other Suppliers Table A-3 lists .