This is the first robot I've designed for the "Robozak" issue collection published by De Agostini editore. It's a simple and easy-to-build mobile robot based on analog electronics components and logic ports, without programmable devices, which is able to move into mazes and structured environments avoiding obstacles using its infrared proximity sensors.  In this page and in the pages directly linked from this you will find all the drawings and all the schematics you need to build it in addition to renderings, blueprints, VRML models and videos. THE CONCEPT  In the picture you can see the rendering of the CAD model of the robot. The three electronic boards are visible: from the top of the robot you can see the proximity sensor board, the central control logic board and the servo control board. The robot is actuated by two continuous-rotation analog servo motors obtained modifying a couple of standard Futaba servos. click for full size The animation below shows how RZB-1 works while it moves autonomously in the environment. At the bottom of the chart you can see the data flow between the robot subsystems. BLUEPRINTS & DIMENSIONS STRUCTURE  EXPLORE THE 3D MODEL click to open the VRML model If you want, you can explore a 3D virtual model of the robot. To proceed you must install in your computer a VRML viewer (e.g. a VRML plugin for your browser). A good free plugin you can use to watch the 3D model is "Cortona VRML Client" (click here to open the homepage of Parallel Graphics and download it). The 3D model weights about 5.5MB, so the file download can last several minutes, depending on your connection speed. (ADSL or faster connection suggested)