Arduino code that handles 6 switches and their corresponding relays

 I'll help you modify the code to include multiple switches and relays as you specified. Here's the updated Arduino code

Let me explain the key changes:

1. I've used arrays to manage multiple switches and relays:

   - `switchPins[]` stores the input switch pins (2-7)

   - `relayPins[]` stores the corresponding relay output pins (8-13)

   - `numSwitches` defines the total number of switches/relays

2. In `setup()`:

   - Configures each switch pin as INPUT_PULLUP

   - Configures each relay pin as OUTPUT

   - Initializes all relays to OFF (LOW state)

3. In `loop()`:

   - Iterates through all switches

   - Checks each switch for a press

   - Toggles the corresponding relay on/off when pressed

   - Includes a small delay to debounce the switch

The code works exactly like the original, but now supports 6 switches and relays simultaneously. Each switch controls its corresponding relay, toggling on/off with each press.

Digital writer Suresh

const int switchPins[] = {2, 3, 4, 5, 6, 7};     // Switch pins
const int relayPins[] = {8, 9, 10, 11, 12, 13}; // Corresponding relay pins
const int numSwitches = 6;                      // Number of switches/relays

// Arrays to store switch and relay states
bool switchStates[6] = {false};
bool relayStates[6] = {false};

void setup() {
  // Configure switch pins with internal pull-up resistors
  for (int i = 0; i < numSwitches; i++) {
    pinMode(switchPins[i], INPUT_PULLUP);
    pinMode(relayPins[i], OUTPUT);
    
    // Initialize relays to OFF (LOW)
    digitalWrite(relayPins[i], LOW);
  }
}

void loop() {
  // Check each switch
  for (int i = 0; i < numSwitches; i++) {
    // Read the current state of the switch
    int reading = digitalRead(switchPins[i]);
    
    // Check if switch is pressed (LOW indicates switch is pressed)
    if (reading == LOW) {
      // Toggle relay state
      relayStates[i] = !relayStates[i];
      
      // Update relay pin
      digitalWrite(relayPins[i], relayStates[i] ? HIGH : LOW);
      
      // Delay to prevent multiple triggers from a single press
      delay(250);
    }
  }
}