How to Control LED Strips With Arduino – Part 1: Single-Color Strips

1const int ledPin = 11;         // PWM pin connected to MOSFET gate
2const int buttonPin = 2;       // Button with internal pull-up
3const int potPin = A3;         // Potentiometer pin
4
5volatile bool ledState = false;               // LED on/off state
6volatile unsigned long lastDebounceTime = 0;  // Debounce timer
7const unsigned long debounceDelay = 50;       // 50ms debounce delay
8
9void setup() {
10  pinMode(ledPin, OUTPUT);
11  pinMode(buttonPin, INPUT_PULLUP); // Use internal pull-up
12  attachInterrupt(digitalPinToInterrupt(buttonPin), toggleLED, FALLING);
13}
14
15void loop() {
16  int brightness = map(analogRead(potPin), 0, 1023, 0, 255); // Map analog to PWM
17  if (ledState) {
18    analogWrite(ledPin, brightness); // Set brightness
19  } else {
20    analogWrite(ledPin, 0);          // Turn off if LED is off
21  }
22}
23
24// Interrupt function to toggle LED state
25void toggleLED() {
26  unsigned long currentTime = millis();
27  if (currentTime - lastDebounceTime > debounceDelay) {
28    ledState = !ledState; // Toggle LED state
29    lastDebounceTime = currentTime;
30  }
31}