DIY line Tracking Robot Smart Car kit

Working principle
Chip lm393 compared the resistor value, when there is an imbalance, the chip will control one motor to stop, while other motor accelerate rotation, in this case, the car can correct direction. The whole process is closed-loop control, so it can be quickly controleed

Package Included:
1 x lm393 voltage comparator
1 X 8P IC Socket
2 X 100uf capacitor
2 X 10K resistor  
2 X 3.3K ohms color ring resisotr
2 x 10K resistor
4 x 51 ohm resistor
2 X 1K ohm resistor/
2 X 10 ohm resistor
2 X CDS5 photoresistor
2 X 3MM led
2 x 5MM LED
2 x 8550 TRIODE
1 x Switch
2 X Motor
6 X Wheel
1 X AA battery case
Several screws and wires