http://letsmakerobots.com/taxonomy/term/50 The taxonomy view with a depth of 0. en-DA http://letsmakerobots.com/node/22 <div class="field field-type-image field-field-primary-image"> <h3 class="field-label">Primary image</h3> <div class="field-items"> <div class="field-item"><a href="/node/22"><img src="http://letsmakerobots.com/files/imagecache/robot_thumb/files/field_primary_image/nxt_robot_thumb.jpg" alt="nxt_robot_thumb.jpg" title="The robot doing laps on the MINDSTORMS testpad" /></a></div> </div> </div> <div class="field field-type-text field-field-what-does-it-do"> <h3 class="field-label">What does it do?</h3> <div class="field-items"> <div class="field-item">Smoothly follows a black line</div> </div> </div> <p>The robot measures line position with the 4 line sensors and feeds this to a PD-regulator which in turn produces the two motor outputs. This setup gives a smooth line following.</p><p>The cost of the robot is roughly the cost of a set of MINDSTORMS NXT + 3 additional NXT light sensors and the rechargeable battery.</p><p>The time to build includes several mutations of the basic design - time flies when you play with LEGO ;-). Of course some time was spent finding some usable values for the P and D constants for the PD-regulation.</p><p>I used the Bricxcc IDE for developing the controller program.</p> <div class="field field-type-number-decimal field-field-cost-to-build"> <h3 class="field-label">Cost to build</h3> <div class="field-items"> <div class="field-item">$650,00</div> </div> </div> <div class="field field-type-video-cck field-field-em-video"> <h3 class="field-label">Embedded video</h3> <div class="field-items"> <div class="field-item"></div> <div class="field-item"></div> <div class="field-item"></div> <div class="field-item"></div> </div> </div> <div class="field field-type-number-integer field-field-finished-project"> <h3 class="field-label">Finished project</h3> <div class="field-items"> <div class="field-item"></div> </div> </div> <div class="field field-type-number-integer field-field-locomotor-number"> <h3 class="field-label">Number</h3> <div class="field-items"> <div class="field-item"></div> </div> </div> <div class="field field-type-number-decimal field-field-time-to-build"> <h3 class="field-label">Time to build</h3> <div class="field-items"> <div class="field-item">5 hours</div> </div> </div> <div class="field field-type-text field-field-locomotion-type"> <h3 class="field-label">Type</h3> <div class="field-items"> <div class="field-item"></div> </div> </div> <div class="field field-type-link field-field-url-more-info"> <h3 class="field-label">URL to more information</h3> <div class="field-items"> <div class="field-item"></div> </div> </div> <div class="field field-type-number-integer field-field-weight"> <h3 class="field-label">Weight</h3> <div class="field-items"> <div class="field-item">722 grams</div> </div> </div> http://letsmakerobots.com/node/22#comments Lego line follower 2 MINDSTORMS NXT servo motors 4 NXT Light sensors DTU RoboCup indoor LEGO MINDSTORMS NXT NXC (Not eXactly C) NXT rechargeable battery http://letsmakerobots.com/crss/node/22 Tue, 05 Feb 2008 13:55:16 -0500 jip 22 at http://letsmakerobots.com