Reaction Game¶
Our body has many reaction times, such as audio RT, visual RT, touch RT, etc.
Reaction times have many effects on our daily life, for example, slower than normal reaction times when driving can lead to serious consequences.
In this project, we use 3 buttons and 2 LEDs to measure our visual reaction time.
The serial monitor of the Arduino displays the message “waiting…” After pressing the Ready button, one of the two LEDs must light up randomly after a random time interval. It is important that the testee pushes the corresponding button as soon as possible. The Arduino records the time difference between when the LED lights up and when the person presses the corresponding button, and prints the measured response time on the Arduino serial monitor.
Required Components
In this project, we need the following components.
1. Arduino UNO Board
2. Jumper Wire
4.Resistor
5. LED
6. Button
SCHEMATIC DIAGRAM
CODE///
/ set pin numbers:
const int buttonPin1 = 2; // the number of the pushbutton1 pin
const int buttonPin2 = 3; // the number of the pushbutton2 pin
const int rstBtn = 9; // the number of the rst button pin
const int ledPin1 = 6; // the number of the LED1 anode(+) pin
const int ledPin2 = 7; // the number of the LED2 anode(+) pin
int flag = -1;
int timer = 0;
void setup()
{
pinMode(buttonPin1, INPUT);
pinMode(buttonPin2, INPUT);
pinMode(rstBtn, INPUT);
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
//enabling serial communication
Serial.begin(115200);
// set initial LED state
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
attachInterrupt(digitalPinToInterrupt(buttonPin1), pressed1, FALLING);
attachInterrupt(digitalPinToInterrupt(buttonPin2), pressed2, FALLING);
Serial.println("GAME START...");
Serial.println("Click the rst button to play...");
}
void loop()
{
if (flag == -1 && digitalRead(rstBtn) == LOW) {
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
Serial.println("Waiting...");
int randomTime = random(2000, 5000);
delay(randomTime);
timer = millis();
flag = randomTime % 2;
Serial.println("Light!");
if (flag == 0) {
digitalWrite(ledPin1, HIGH);
} else if (flag == 1) {
digitalWrite(ledPin2, HIGH);
}
}
delay(200);
}
void pressed1() {
if (flag == -1) {
return;
}
if (flag == 0) {
int currentTime = millis();
Serial.print("Correct! You reaction time is : ");
Serial.print(currentTime - timer);
Serial.println(" ms");
} else if (flag == 1) {
Serial.println("Wrong Click!");
}
flag = -1;
}
void pressed2() {
if (flag == -1) {
return;
}
if (flag == 1) {
int currentTime =millis();
Serial.print("Correct! You reaction time is : ");
Serial.print(currentTime - timer);
Serial.println(" ms");
} else if (flag == 0) {
Serial.println("Wrong Click!");
}
flag = -1;
}
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