Power supply: 3V DC (two five batteries)
Automatic trajectory patrol: accurate photoelectric sensing technology, to ensure that the trolley along the 15mm black trajectory stable driving
DIY Creator Kit: suitable for experimental teaching, cultivate hands-on ability, experience the fun of assembling from scratch
High-efficiency voltage comparison: adopts LM393 chip, high sensitivity, fast response, precise control
Simple and easy to use design: only two AA battery power supply, board size moderate, easy to carry and operate
Flexible adjustment of sensitivity: standardized photoresistor and LED welding height, user-defined tracing sensitivity to ensure optimal performance

Working principle:
LM393 compares the size of the two photoresistors at any time, when there is an imbalance (for example, one side of the pressure black runway) immediately control one side of the motor to stop
the other side of the motor to accelerate the rotation, so as to make the trolley to correct the direction and restore the correct direction
the whole process is a closed-loop control, and therefore can be quickly and sensitively controlled.

Notes:
The height of the photoresistor and LED under the front chassis must be appropriate.
They should be parallel and positioned approximately 0.2-0.4 cm above the ground.
Sensitivity largely depends on the precision of soldering at this point.

Package include:
1 x Intelligent diy kit