Gesture Controlled Car
There are a couple important components to the gesture controlled car. One major component is the Arduino. The Arduino holds most of the code and is placed inside the car next to the motor driver. The motor driver is an important component. The motor driver makes the wheels on the car move. It is plugged into a battery pack which gives the motor driver the power to move the wheels. It is also connected to the Arduino which tells the motor driver what to do through code. The last major component to the car is the N.R.F.. The N.R.F. connects the hand piece to the car. N.R.F is radio frequency, which is similar to Bluetooth.
Engineer
Austen D
Area of Interest
Hardware Engineering
School
Trevor Day
Grade
8th
Demo Night
First Milestone
// Motor A connections
int enA = 9;
int in1 = 8;
int in2 = 7;
// Motor B connections
int enB = 3;
int in3 = 5;
int in4 = 4;
void setup() {
// Set all the motor control pins to outputs
pinMode(enA, OUTPUT);
pinMode(enB, OUTPUT);
pinMode(in1, OUTPUT);
pinMode(in2, OUTPUT);
pinMode(in3, OUTPUT);
pinMode(in4, OUTPUT);
// Turn off motors – Initial state
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
}
void loop() {
directionControl();
delay(1000);
speedControl();
delay(1000);
}
// This function lets you control spinning direction of motors
void directionControl() {
// Set motors to maximum speed
// For PWM maximum possible values are 0 to 255
analogWrite(enA, 255);
analogWrite(enB, 255);
// Turn on motor A & B
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
delay(2000);
// Now change motor directions
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
delay(2000);
// Turn off motors
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
}
// This function lets you control speed of the motors
void speedControl() {
// Turn on motors
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
// Accelerate from zero to maximum speed
for (int i = 0; i < 256; i++) {
analogWrite(enA, i);
analogWrite(enB, i);
delay(20);
}
// Decelerate from maximum speed to zero
for (int i = 255; i >= 0; –i) {
analogWrite(enA, i);
analogWrite(enB, i);
delay(20);
}}
For my first Milestone I wanted to get the motor driver connected to the wheels and the Arduino. I used this Link to help me connect the motor driver to the wheels, the Arduino, and the battery pack: https://lastminuteengineers.com/l298n-dc-stepper-driver-arduino-tutorial/
Second Milestone
For my second milestone I decided to put all the components on the hand piece. I connected the N.R.F. to the Arduino nano but when I tried to upload code to the nano it said that there was an error. So I tried many other ways to upload the code and it still said that there was an error. After a long while of me trying to upload the code, I came to the conclusion that the nano was broken. So I needed to get another Arduino but instead of getting another nano I got an uno, which is just like a nano but bigger. Once it came I finally could upload the code. Once I uploaded the code the N.R.F.s connected so I could start sewing. For me sewing was really easy because I sewed a couple times before. Once I finished sewing the N.R.F. and the Arduino it was time to connect the accelerator, which is the thing that senses your movement. I only had one issue but it wasn’t really an issue. When I went to the serial monitor it was printing a bunch of gibberish but when I asked what was going on Skye, my instructor, said that my baud rate was incorrect so when I changed it it started printing out the axis the accelerator was on. Once I saw that working I used a hot glue gun to stick the accelerator to the Arduino. When I was done the hand piece was completed and I just needed to add the code and my project would be finished. I thought it was really fun making my code. I did take some of Sohan’s code but only the glove side. I also made some adjustments to the hand movements in Sohan’s code. Once I finished the code my project was completed.
