The line tracking control of a mobile competition robot is carried as an embedded system design course pivot project. The project is suitable for Problem and Project Based Learning methodology, and satisfies most of program outcome criteria stated by ABET-09 and EUR-ACE-08 on engineering design. Furthermore, the project motivates students for learning high technology tracks and encourages them for graduate studies such as mechatronics and robotics. The project is carried in parallel to Problem and Project Based Learning approach in Fall 08-09. It is based on the control of forward/backward movement and steering motors of a toy-car installed with a microcontroller which reads track position sensors and decides on which way to run the motors, by software in C language. Analog sensor readings require digital filter design and considerable design of test experiments before using them in a control loop