This project produced a remotely controlled car that responds to claps to move forward, back, and stop, depending on the number of claps.
The car responds to 2 claps to move forward, 3 claps to move backward, and 1 clap to halt.
Tools:
3D CAD – SolidWorks parametric
3D print – Ender 3 Extended
Laser Cutter – CorelDRAW, Epilog
Elegoo UNO R3 Board
Motor Driver L298N
KY-037 sound sensor
DC electric gear motor
Foam corte board
Clap clap clap
20231006_124025.mp4Making Process
Arduino Code
#define enA 9
#define in1 6
#define in2 5
#define in3 3
#define in4 4
const int threshold = 225; // Threshold for clap detection
unsigned long lastClapTime = 0;
int clapCount = 0;
int ClapLag = 150;
int MoveLag = 600;
void setup() {
pinMode(enA, OUTPUT);
pinMode(in1, OUTPUT);
pinMode(in2, OUTPUT);
Serial.begin(115200);
stopMotor(); // Ensure motor is stopped at the start
}
void loop() {
int sensorValue = analogRead(A0);
// Detect a clap
if (sensorValue > threshold && millis() - lastClapTime > ClapLag) {
Serial.println("Clap");
Serial.println(sensorValue);
clapCount++;
lastClapTime = millis();
delay(200); // Prevents multiple detections from a single clap
}
// If no claps detected for a period of time, decide action based on clap count
if (millis() - lastClapTime > MoveLag && clapCount > 0) {
if (clapCount == 2) {
moveForward();
} else if (clapCount == 3) {
moveBackward();
} else if (clapCount == 1) {
stopMotor();
}
clapCount = 0; // Reset clap count after taking action
}
}
void moveForward() {
analogWrite(enA, 255);
digitalWrite(in1, LOW);
digitalWrite(in2, HIGH);
digitalWrite(in3, LOW);
digitalWrite(in4, HIGH);
}
void moveBackward() {
analogWrite(enA, 255);
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
}
void stopMotor() {
analogWrite(enA, 0);
digitalWrite(in1, LOW);
digitalWrite(in2, LOW);
digitalWrite(in3, LOW);
digitalWrite(in4, LOW);
}
Links to the code referenced: