4)
The front view of the robot
Function about every component
：
1.
Infrared transmitter
：
transmit the infrared signal, the signal can be used for detecting
obstacles
2.
sensitive with the light, so it can help you get some information
about the light
3.
Infrared receiver
：
receive infrared signal, the signal can be used for obstacle avoidance
4.
Button
：
can be programmed for your idea
5.
RGB LED
：
you can change its color use your code, it can show as an alarm and other
things you want
6.
USB port
：
download your code and let your robot talk to your computer
7.
Buzzer
（
passive
）：
be an alarm bell or sing a simple song
8.
Controller
：
runs your code
9.
Motor
：
can be controlled to run forward or backward, so that the car can turn left or right
freely
10.
Reset button
；
Reset the robot, the program in the robot will runs again from its initiation
11.
Power switch
：
power switch of the robot
12.
Power port
：
power provided from this port
13.
Charge port: if your batteries can be charged
，
you can charge them from this port thus
they can be hold in the car
14.
Infrared line-follow sensor: can be used for detecting for white or black lines
3.Download your first program
Program controls every step of your robot. So you must know how to download your
program into your robot. And firstly, you need to download the software, this is the link
：
Open the website:http://arduino.cc/en/Main/Software, you will see
：
Line tracking sensor
