This is a robot that follows a black line.

Step 1: Things Needed

Bread board- X1
IR sensor- X2
Jumper wires- X19
Motors-X2
Wheels-X2
Chassi-X1
Nut and bolts-X4
L293D

Step 2: Arranging Chassi

Attatch the 2 wheels to the motors and chassi as shown in picture and connect motors to chassi wiht nuts and bolts.

Step 3: Wiring Motors

Solder the wires to the motor and cover it with tape.

Step 4: Arduino

Keep the arduino on the bread board with L293D and connevt a 9V battery to the L293D. Connect the 2 positive sections to each other as shown in the figure.

Step 5: Connecting Wires to L293D

connect the 2 wires from the motor to the L293D as shown in figure

Step 6: Wiring of IR Sensor

connect the wires as shown in the figure.

Step 7: Wiring