Turn on two lamps connected to Arduino UNO using push buttons

Arduino UNO 05-12-23

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Tutorial plan

1- The components necessary to control two lamps by push buttons through the Arduino UNO board

2- Mounting the Arduino UNO board with two lamps, two relays and two push buttons

3- Programming the Arduino UNO board to turn on two lamps using two push buttons

The components necessary to control two lamps by push buttons through the Arduino UNO board

To control the two lamps using the Arduino UNO board, two relays and push buttons, you will need the following components:

1- Arduino UNO board:

Arduino Uno

The Arduino UNO board is a popular microcontroller board based on the ATmega328P microcontroller. It is one of the most commonly used Arduino boards and provides a versatile platform for creating interactive electronic projects.

The Arduino UNO board is suitable for beginners and experienced users alike, offering a flexible and accessible platform for prototyping and building various electronic projects, from simple LED blinking to complex robotics and home automation systems.

2- Two relays modules:

Two relays

You'll need two relays modules that are compatible with the Arduino UNO and can switch the high-voltage lamps. Ensure it's rated for the voltage and current required for your lamps.

3- Two lamps (220V):

The two lamps you want to control, which are rated for 220V.

4- Power Supply for the Lamp:

You'll need a power source for the lamps, typically a 220V AC power supply.

5- Wiring:

Various wires and cables for connecting the components in your circuit.

6- Push button:

push button

A push button, also known as a momentary switch or tactile switch, is a simple yet commonly used electromechanical component in electronics. It is designed to make or break an electrical connection temporarily when pressed or released.

7- Resistance

In the context of electronics and electrical circuits, a resistance refers to a passive two-terminal electrical component that restricts the flow of electric current. It is typically measured in ohms (Ω).

8- Breadboard:

Breadboard

A breadboard is a prototyping board that allows you to build circuits without soldering. It provides a convenient way to connect the components together.

9- Jumper Wires:

Jumper Wires

You'll need jumper wires to make connections between the Arduino UNO, the two lamps, two relays, two push buttons and breadboard.

Mounting the Arduino UNO board with two lamps, two relays and two push buttons

Once you have the necessary components, you can proceed with the following steps to control the two lamps with two push buttons:

1- Connect the first relay module to the first push button:

- Connect one leg of the push button to pin 4 of the Arduino.

- Connect another leg of the push button to the 5V pin of the Arduino.

- Place a 10k Ohm resistor between the third leg of the push button and the GND pin of the Arduino.

2- Connect the first relay to the Arduino UNO:

- Connect the relay's control pin (S) to pin 2 of Arduino UNO board.

- Connect the pin (+) of relay to pin 3.3V of Arduino UNO board.

- Connect the relay's ground pin (GND) to the Arduino UNO's GND.

3- Connect the first lamp and the power supply to the Relay:

- Connect one of the the power supply's wires to the relay's common (COM) terminal.

- Connect the wire of the lamp to the normally open (NO) terminal of the relay.

- Connect the neutral wire of the power supply directly to the neutral wire of the lamp.

4- Connect the seconf relay module to the second push button:

- Connect one leg of the push button to pin 5 of the Arduino.

- Connect another leg of the push button to the 5V pin of the Arduino.

- Place a 10k Ohm resistor between the third leg of the push button and the GND pin of the Arduino.

5- Connect the second relay to the Arduino UNO:

- Connect the relay's control pin (S) to pin 3 of Arduino UNO board.

- Connect the pin (+) of relay to pin 3.3V of Arduino UNO board.

- Connect the relay's ground pin (GND) to the Arduino UNO's GND.

6- Connect the second lamp and the power supply to the Relay:

- Connect one of the the power supply's wires to the relay's common (COM) terminal.

- Connect the wire of the lamp to the normally open (NO) terminal of the relay.

- Connect the neutral wire of the power supply directly to the neutral wire of the lamp.

Mounting the Arduino UNO board with two lamps, two relays and push buttons

Programming the Arduino UNO board to turn on two lamps using the two push buttons

To program an Arduino Uno board to turn on two lamps using two relays and two push buttons, you'll need to write the Arduino code. Here's a sample code to get you started:

#define Relay_lamp1 2 // the first relay connected to pin 2 of the Arduino    
#define lamp1_BUTTON_PIN 4 // the first push button connected to pin 4 of the Arduino

#define Relay_lamp2 3 // the second relay connected to pin 3 of the Arduino   
#define lamp2_BUTTON_PIN 5 // the second push button connected to pin 5 of the Arduino

byte lamp1lastButtonState = LOW; // to keep the state of the first button
byte lamp1State = LOW; // to keep the state of first relay

byte lamp2lastButtonState = LOW; // to keep the state of the second button
byte lamp2State = LOW; // to keep the state of second relay

unsigned long debounceDuration = 50; // millis
unsigned long lastTimelamp1ButtonStateChanged = 0;
unsigned long lastTimelamp2ButtonStateChanged = 0;

void setup() {
   // initialize the first relay pin as an output:
  pinMode(Relay_lamp1, OUTPUT);
  // initialize the first pushbutton pin as an input:
  pinMode(lamp1_BUTTON_PIN, INPUT);
   // initialize the second relay pin as an output:
  pinMode(Relay_lamp2, OUTPUT); 
  // initialize the second pushbutton pin as an input:
  pinMode(lamp2_BUTTON_PIN, INPUT);
}

void loop() {
   if (millis() - lastTimelamp1ButtonStateChanged > debounceDuration) {
    byte lamp1buttonState = digitalRead(lamp1_BUTTON_PIN); // vérifie si le bouton poussoir est enfoncé
    if (lamp1buttonState != lamp1lastButtonState) {
      lastTimelamp1ButtonStateChanged = millis();
      lamp1lastButtonState = lamp1buttonState;
      if (lamp1buttonState == LOW) {
        lamp1State = (lamp1State == HIGH) ? LOW: HIGH; // Toggle the state of the relay when the button has been released
        digitalWrite(Relay_lamp1, lamp1State); // Turn the first lamp on or off depending on the state of the relay
      }
    }
  }

  if (millis() - lastTimelamp2ButtonStateChanged > debounceDuration) 
  { 
   byte lamp2buttonState = digitalRead(lamp2_BUTTON_PIN); 
   if (lamp2buttonState != lamp2lastButtonState) { 
     lastTimelamp2ButtonStateChanged = millis(); 
     lamp2lastButtonState = lamp2buttonState; 
     if (lamp2buttonState == LOW) { 
       lamp2State = (lamp2State == HIGH) ? LOW: HIGH; // Toggle the state of the relay when the button has been released
       digitalWrite(Relay_lamp2, lamp2State); // Turn the second lamp on or off depending on the state of the relay
       } 
     } 
  }
}

#define Relay_lamp1 2 // the first relay connected to pin 2 of the Arduino

#define lamp1_BUTTON_PIN 4 // the first push button connected to pin 4 of the Arduino

#define Relay_lamp2 3 // the second relay connected to pin 3 of the Arduino

#define lamp2_BUTTON_PIN 5 // the second push button connected to pin 5 of the Arduino

byte lamp1lastButtonState = LOW; // to keep the state of the first button

byte lamp1State = LOW; // to keep the state of first relay

byte lamp2lastButtonState = LOW; // to keep the state of the second button

byte lamp2State = LOW; // to keep the state of second relay

unsigned long debounceDuration = 50; // millis

unsigned long lastTimelamp1ButtonStateChanged = 0;

unsigned long lastTimelamp2ButtonStateChanged = 0;

void setup() {

// initialize the first relay pin as an output:

pinMode(Relay_lamp1, OUTPUT);

// initialize the first pushbutton pin as an input:

pinMode(lamp1_BUTTON_PIN, INPUT);

// initialize the second relay pin as an output:

pinMode(Relay_lamp2, OUTPUT);

// initialize the second pushbutton pin as an input:

pinMode(lamp2_BUTTON_PIN, INPUT);

}

void loop() {

if (millis() - lastTimelamp1ButtonStateChanged > debounceDuration) {

byte lamp1buttonState = digitalRead(lamp1_BUTTON_PIN); // vérifie si le bouton poussoir est enfoncé

if (lamp1buttonState != lamp1lastButtonState) {

lastTimelamp1ButtonStateChanged = millis();

lamp1lastButtonState = lamp1buttonState;

if (lamp1buttonState == LOW) {

lamp1State = (lamp1State == HIGH) ? LOW: HIGH; // Toggle the state of the relay when the button has been released

digitalWrite(Relay_lamp1, lamp1State); // Turn the first lamp on or off depending on the state of the relay

}

if (millis() - lastTimelamp2ButtonStateChanged > debounceDuration)

{

byte lamp2buttonState = digitalRead(lamp2_BUTTON_PIN);

if (lamp2buttonState != lamp2lastButtonState) {

lastTimelamp2ButtonStateChanged = millis();

lamp2lastButtonState = lamp2buttonState;

if (lamp2buttonState == LOW) {

lamp2State = (lamp2State == HIGH) ? LOW: HIGH; // Toggle the state of the relay when the button has been released

digitalWrite(Relay_lamp2, lamp2State); // Turn the second lamp on or off depending on the state of the relay

}

This code sets up the two push buttons to toggle the two relays state when pressed. When you press one of the buttons, it will turn the lamp on, and when you press it again, it will turn the lamp off.