Arduino Input

2-Code

//2024.5.27 by JinXuan
// Define the pins connected to Arduino
const int sensorPin = A0; // Pressure sensor connected to A0
const int redLEDpin = 3; // Red LED connected to D3
const int greenLEDpin = 4; // Green LED connected to D4

// Define thresholds
const int lowThreshold = 70; // Low pressure threshold
const int highThreshold = 80; // High pressure threshold

void setup() {
Serial.begin(9600); // Initialize serial communication
pinMode(sensorPin, INPUT); // Set pressure sensor pin as input
pinMode(switchPin, INPUT_PULLUP); // Set switch pin as input and enable internal pull-up resistor
pinMode(redLEDpin, OUTPUT); // Set red LED pin as output
pinMode(greenLEDpin, OUTPUT); // Set green LED pin as output
}

void loop() {
// Read the analog value of the pressure sensor
int sensorValue = analogRead(sensorPin);

if (sensorValue < lowThreshold) {
digitalWrite(greenLEDpin, HIGH); // Turn on green LED
digitalWrite(redLEDpin, LOW); // Turn off red LED
} else if (sensorValue > highThreshold) {
digitalWrite(greenLEDpin, LOW); // Turn off green LED
digitalWrite(redLEDpin, HIGH); // Turn on red LED
}

// To avoid high CPU usage, add a short delay here
delay(50);
}
    

3-Circuit diagram

4-Physical connection mode

5-Effect display