Line tracking robot base

Simple low-cost line tracking robot base that you can 3d print and build. Will follow a line made from standard black ¾ inch electrical tape applied to a reflective surface. Uses to TT gear motors 1:48, low coast IR sensors and Dual-H-bridge driver. Will work on 3 volts but I chose 4.5 volts "3 AA batteries for speed. The second version uses a third IR sensor aimed to the front to act as an emergency STOP if something gets in front of the robot or if the robot jumps the coarse and heads off for a wall. The design automatically stops the wheel motors when not sitting on the reflective surface. Build video coming to YouTube soon on my ROBOTHUT channel