LIGHT SENSOR - OCHINAI ROBO has 2 light sensors which face the floor and check if there is a floor underneath. If the robot comes at the end of the floor, a table for example, then the sensors sense it, and the robot quickly moves backward, changes direction before moving forward again.
Idler gear system is adopted as a driving system which the torque of the axis of a motor is transferred directly to the tire.
The product includes a small PCB and a resistor which you can use for soldering practice before actually starting the product assembly.