# IR Line Following Car

Terry W

###### Area of Interest

Mechanical Engineering and Computer Science

###### School

Bellarmine College Preparatory

Rising Sophomore

## For my first milestone, I decided that gaining control of both motors would be adequate. I began by removing all of the components from the car except for the stock PCB, the motors, and the drive base. I then began analyzing my PCB, and determining whether or not it would be essential to my project. After some planning, I concluded that I would not need the PCB. I went ahead and hot glued my motor driver (SparkFun L928N) onto my drive base, and began wiring some motors. After determining the proper connections needed, I stripped, tinned, and connected my motor wires to the motor driver. I then attached jumper cables from the motor driver to the Arduino, as well as jumper cables for power. The biggest challenge I faced during my first milestone was perfecting my steering mechanism. The steering was driven by a DC motor, which I found impractical. I did a lot of testing with the motor and my code, to determine the exact speed and timing needed to turn my car. In the end, after a few days of testing, I finally found the appropriate timing and speed for my motor.

### Starter Project

#### How it Works

The entire project consists of the following components: an Arduino Uno, a mini breadboard, jumper wires, a potentiometer, a temperature sensor, and a LCD (liquid crystal display). The core component of the entire project is the temperature sensor. The sensor works by changing its voltage output, proportionally to the change in temperature. <insert sentence about analog signal> The Arduino then reads the analog signal, and through a series of equations, converts it into a digital signal, and displays it on the LCD.

My starter project is the Temperature Sensor Display. The temperature sensor display features an LCD which displays the temperature. I chose the project because I wanted to challenge myself (it was rated as one of the harder projects), found it the most interesting, and thought it would be a good balance between light coding and soldering.

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