Simple line tracking robot car kit that is designed to introduce people of all ages to electronics and soldering.
The red LEDs (on the bottom) illuminate the surface in front of the car and the LDRs (light dependent resistors) pick up the reflection off the surface. The comparator (LM393) will then determine if the car is following the line and make the necessary adjustments. R1 and R2 potentiometers are used to adjust the sensitivity of the LDRs.
Requires 2 x AA batteries (not included).
Tools required: soldering iron, side cutters, Philips screwdriver