Three IR Line Following using an external IR sensor and quarky without PID – Without Adaptive Feedback

Steps

1. Connect the External IR module digital pin with the quarky 
2. Set IR threshold using a potentiometer on the module for line following and stopping the robot at the crossing lines
3. The below example uses without-pid line following blocks
4. When you click do line following robot, start line following and stop at the check-point (when both IRs are at the Black line).

Script