💡 IR Remote Controlled Lamp

✨ Wireless control for your moonlight lamp ✨

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🕹️ Turn your 230VAC lamp on/off using any standard IR remote

✅ Easy to build
✅ Perfect for bedroom or living room
✅ Arduino + IR receiver module

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🎥 Demo (Plz wait for loading...)

🎬 Demo: Lamp toggles with every button press (for me is ON/OFF)

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🌟 Features at a Glance

Feature	Description
🎮 Wireless Control	Operate from up to 10 meters away
🔄 Toggle Function	One button - ON/OFF control
⚡ Quick Response	Instant switching with debounce protection
📟 Serial Feedback	Real-time status monitoring
🔌 Simple Setup	Only 3 wires to connect!
💰 Budget Friendly	Under $10 for the entire setup

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📋 Table of Contents

• Overview
• Components Used
• Circuit Wiring
• Pin Connections
• How It Works
• Code Explanation
• Installation
• Usage
• Safety Warnings
• Troubleshooting
• Customization
• License

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🎯 Overview

This project transforms your ordinary Moonlight 230VAC 15W lamp into a smart, remote-controlled lighting system. Using an IR receiver sensor and a 5V relay module, you can toggle your lamp ON/OFF from across the room with any standard IR remote control.

Features:

• ✅ Wireless control up to 10 meters
• ✅ Debounced input (no accidental toggling)
• ✅ Serial monitor feedback
• ✅ Works with any NEC protocol remote
• ✅ Low power consumption

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🧩 Components Used

Component	Specification	Quantity
Arduino Board	Uno/Nano/Mega	1
IR Receiver Sensor	VS1838B / Any 38kHz	1
Relay Module	5V Single Channel	1
Moonlight Lamp	230VAC 15W	1
Jumper Wires	Male-Female / Male-Male	5-6
IR Remote	Any NEC protocol	1

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🔌 Circuit Wiring

System Overview

          ┌─────────────┐
          │   Arduino   │
          │             │
          │  Pin 11 ◄───┼──── IR Receiver
          │  Pin 3  ──► ┼──── Relay Module
          │  5V     ──► ┼────┐
          │  GND    ──► ┼────┼──── Common Ground & Power
          └─────────────┘    │
                    │         │
                    ▼         ▼
              ┌─────────┐  ┌─────────┐
              │  Relay  │  │   IR    │
              │ Module  │  │ Sensor  │
              └────┬────┘  └─────────┘
                   │
                   ▼
            ┌─────────────┐
            │    Lamp     │
            │  230VAC 15W │
            └─────────────┘

Detailed Wiring Instructions

🔴 IR Receiver Sensor (Pin 11)

Sensor Pin	Connect To
VCC (Left)	Arduino 5V
GND (Right)	Arduino GND
OUT (Center)	Arduino Pin 11

🟢 Relay Module (Pin 3)

Relay Pin	Connect To
VCC	Arduino 5V
GND	Arduino GND
IN (Signal)	Arduino Pin 3

💡 Lamp Wiring (230VAC ⚠️)

Terminal	Connection
Live Wire (Brown/Red)	Relay COM terminal
Relay NO terminal	Lamp Live input
Neutral Wire (Blue/Black)	Direct to Lamp Neutral
Earth Wire (Green/Yellow)	Lamp Earth terminal

AC Mains (230V)
    │
    ├── Live ───► Relay COM ───► Relay NO ───► Lamp Live
    │
    └── Neutral ─────────────────────────────► Lamp Neutral

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📊 Pin Connections

Arduino Pin	Connected To	Purpose
Pin 3	Relay IN	Control lamp (HIGH=OFF, LOW=ON)
Pin 11	IR Receiver OUT	Receive IR signals
5V	Relay VCC + IR VCC	Power supply
GND	Relay GND + IR GND	Common ground

Note: All VCC and GND are connected in parallel (common power/ground)

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⚙️ How It Works

1. IR Receiver constantly listens for infrared signals from your remote
2. When you press a button, it captures the unique hex code (e.g., 0xBA45FF00)
3. Arduino compares the received code with your targetCode
4. If matched and debounce time passed (>250ms):
   • Toggles relay state (ON ↔ OFF)
   • Updates lightState variable
   • Prints status to Serial Monitor
5. Relay switches the 230VAC lamp circuit ON/OFF

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💻 Code Explanation

Key Variables

const int relayPin = 3;           // Relay control pin
const int irPin = 11;             // IR sensor input pin
const unsigned long targetCode = 0xBA45FF00;  // Your remote's button code
bool lightState = false;          // Current lamp state (OFF initially)
unsigned long lastPressTime = 0;  // Debounce timer

Setup Function

pinMode(relayPin, OUTPUT);
digitalWrite(relayPin, HIGH);     // Relay OFF (Lamp OFF)
IrReceiver.begin(irPin, ENABLE_LED_FEEDBACK);  // Start IR receiver

Main Loop Logic

if (IrReceiver.decode()) {         // Signal received?
  if (code matches && debounce) {  // Valid button press?
    lightState = !lightState;      // Toggle state
    digitalWrite(relayPin, lightState ? LOW : HIGH);  // Control relay
  }
  IrReceiver.resume();             // Ready for next signal
}

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📥 Installation

1. Install Required Library

# In Arduino IDE:
Sketch → Include Library → Manage Libraries → Search "IRremote" → Install

2. Get Your Remote's IR Code

Upload this test sketch to find your button code:

#include <IRremote.h>

void setup() {
  Serial.begin(9600);
  IrReceiver.begin(11);
  Serial.println("Press any button on your remote");
}

void loop() {
  if (IrReceiver.decode()) {
    Serial.print("Code: 0x");
    Serial.println(IrReceiver.decodedIRData.decodedRawData, HEX);
    IrReceiver.resume();
  }
}

Replace 0xBA45FF00 in the main code with the code you received!

3. Upload Main Sketch

1. Open ir_relay_control.ino in Arduino IDE
2. Select your board (Tools → Board → Arduino Uno/Nano)
3. Select correct COM port
4. Click Upload (→)

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🎮 Usage

1. Power on your Arduino (USB or 9V adapter)
2. Open Serial Monitor (9600 baud) to see status messages
3. Point your IR remote at the receiver (within 10 meters)
4. Press the programmed button → Lamp toggles ON
5. Press again → Lamp toggles OFF
6. Serial Monitor shows:

   IR Ready - Press the programmed button
   ON
   OFF
   ON
   

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⚠️ Safety Warnings

🚨 HIGH VOLTAGE WARNING - 230VAC

This project involves mains voltage (230VAC) which can cause electric shock or death!

Mandatory Safety Precautions:

• ✅ Disconnect power before wiring the lamp
• ✅ Use insulated tools only
• ✅ Place everything in a non-conductive enclosure
• ✅ Heat shrink tubing on all AC connections
• ✅ Keep high voltage away from low voltage circuits
• ✅ Double-check wiring before powering on
• ✅ Add a fuse (1A slow-blow) on live wire
• ✅ Never touch wires while powered

Recommended:

• Use a pre-wired relay module with opto-isolation
• Add a status LED to indicate relay state
• Use wire nuts or WAGO connectors for AC wiring

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🔧 Troubleshooting

Problem	Possible Cause	Solution
Lamp doesn't turn ON	Wrong IR code	Find correct code using test sketch
	Relay wired wrong	Check COM → Lamp → NO connection
	Relay failed	Test relay with LED + resistor first
Random toggling	No debounce	Increase delay: change 250 to 300
	IR interference	Shield receiver from sunlight/CFL
No serial output	Wrong baud rate	Set Serial Monitor to 9600
	Wrong pin	Ensure IR sensor on Pin 11
Lamp flickers	Loose connection	Check all AC wire connections
	Relay chattering	Add 10µF capacitor across relay VCC/GND
Short range	Low battery	Replace remote battery
	Obstruction	Clear line-of-sight to sensor

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🎨 Customization

Add Multiple Lamps

const int relayPin2 = 4;
const unsigned long targetCode2 = 0xFF10EF00;

// In loop()
if (code == targetCode2) {
  digitalWrite(relayPin2, !digitalRead(relayPin2));
}

Add Status LED

const int ledPin = 13;
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, lightState ? HIGH : LOW);

Add EEPROM Memory (Save state after power loss)

#include <EEPROM.h>
lightState = EEPROM.read(0);
digitalWrite(relayPin, lightState ? LOW : HIGH);

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📁 Project Structure

arduino-ir-relay-control/
│
├── ir_relay_control.ino          # Main Arduino sketch
├── README.md                      # Project documentation
├── LICENSE                        # MIT License
├── IRremote.h                     # IR library header
├── Arduino-IRremote-master.zip    # Library archive (backup)
│
├── .vscode/                       # VS Code configuration
│   ├── c_cpp_properties.json
│   └── settings.json
│
└── images/                        # Documentation assets
    ├── lamp.gif                   # Live demo animation
    └── pir-sensor.jpg             # Wiring reference image

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📜 License

This project is released under the MIT License so you're free to use, modify, share, and even build commercial products with it. No strings attached, just open-source love.

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🙏 Acknowledgments

Big thanks to the people and projects that made this possible:

• IRremote Library by Ken Shirriff, z3t0, and ArminJo — the backbone of this project
• The Arduino Community — for endless inspiration, forums, and support
• Every open-source hardware contributor — keeping the spirit of DIY alive

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📞 Support

Running into trouble? Try these troubleshooting steps first:

1. 🔌 Double-check your wiring — a loose connection is the #1 culprit
2. 🧪 Test the relay separately — upload a basic blink sketch to isolate issues
3. 📡 Verify your IR receiver — test with any TV remote using the IRrecvDemo sketch
4. 🐛 Still stuck? — Open an issue on GitHub and I'll take a look

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🎨 The "Totally Worked in Theory" Section

Warning: What you're about to see is a beautiful dream that reality rejected😂😂.

I had this brilliant idea . why not use a PIR motion sensor? The lamp turns on automatically when someone walks by! Genius, right?

So I drew my master plan on a whiteboard:

🎨 "Trust me, I'm an engineer" 😑😂 probably me, right before everything went wrong

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❌ Reality:

• My PIR sensor had ✨anxiety✨ 😣 it kept triggering for NO reason
• Filtered it? Still noisy.
• Added capacitors? Still dramatic.
• Talked to it nicely? Ignored me completely.

🧠 What I learned:

Sometimes the universe says "not today, buddy".
So I stuck with the IR remote — it's loyal, quiet, and doesn't have emotional breakdowns.

🤗 A gentle note for future coders:

If you're braver than me and want to try PIR + relay + AC power:

• Keep the sensor FAR from the relay (like, socially distant far)
• Use shielded cables (they're like emotional support wires)
• Add a big capacitor (100µF) — it's basically therapy for electronics

Or just use IR remote like a peaceful person. No shame. 😌

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❤️ This whiteboard drawing now lives here forever as a monument to over-ambitious Tuesday afternoons.

⭐ Show Your Support

If this project lit up your day (literally), consider giving it a star on GitHub . it means more than you know.

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Made with ❤️ and a soldering iron . by DIY enthusiasts, for DIY enthusiasts

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