hi, im doing my final year enginnering in computer science and have chosen to build a vaccum cleaner robot as a project.it carries marks so i needhelp from u guys all thru to get it done.plz do help this amateur in finishing this. i always love challenges and hence chose this topic.i stay in india,and here all such robotics stuff is considered to be hi-fi and we dont have any professors well versed in that field. it has to be completed within 3 months.i have a small budget(around $100).i have no idea abt the availability of the various electronic parts you ppl discuss in different topics. i have a sound knowedge abt electronics and mechanical but a good c/c++ programmer.i have decided it to be a stepper motor driven robot with proximity sensors all around. it communicates with comp using fm and gets it command ,whether to move forward or back. i need help on topics like 1. c/c++ libraries supporting parallel port programming. 2. how do i turn the robot left/right(using axel attached to front wheels or other techniques) 3. wht type of ic's or controller to use for the stepper motor that i use to drive the robot, or is there any simple methods. 4. any tutorial( online ) for building simple robots (easy way) thank a lot. Ashwin.