school roject...need help...
Yea, use this sensor and that sensor...
1. What is the size of your toy car? If its small, does any small enough ultrasonic Tx/Rx component available? Using laser displacement sensor, its huge from my experience.
2. What is the power source? Is it enough for those sensor, signal conditioning, this circuit, that circuit... come on, think!!
3. Your project is a mechanical electronic system which is very complicated to control (such as robotics). In this case, were not just talking about sensors, but how to process the input for a simple output...?
Please consider those factors to help others when you gave comments.