Smart Home Automation System Project using Arduino Automation (such as home automation and industrial automation etc) has become important in today’s world as it helps to complete a task with lesser human assistance and in a smarter way. Houses are becoming smarter and developed these days with the help of automation devices. Home electrical appliances are using remote-controlled switches rather than conventional switches. In today’s world, most of the people have access to smartphones and its use have become very popular and essential in our lives. We can use smartphones to control the household appliances with just one click or one message. With the help of controllers and communication devices home appliances can be remotely controlled. In this project, we will use the Arduino UNO board for the development of Smart Home Automation project with the HC-05 Bluetooth module which is remotely controlled by a smartphone. It can be really helpful for the paralyzed people who cannot d...

 1. What is a Line Follower? A line follower robot is a small autonomous vehicle that can detect and follow a line — usually a black line on a white surface or white line on a black surface. It uses IR (Infrared) sensors to detect the line, and Arduino processes the signals to control the motors. 2. Main Components You’ll Need Arduino Uno / Nano / Mega (Uno is enough for beginners) IR Sensor Module (2, 3, or more sensors depending on accuracy needed) Motor Driver Module (L298N, L293D, or similar) DC Motors (with wheels) Chassis (robot base) Battery Pack (7.4V Li-ion or 9V, depending on motors) Jumper Wires Black Electrical Tape or painted black line for the track 3. How It Works 1. IR sensors shine infrared light on the floor. White surface reflects IR light back → sensor output is HIGH. Black line absorbs IR light → sensor output is LOW. 2. Arduino reads these outputs. 3. Based on sensor readings: If the middle sensor sees the line → go straight. If left sensor detects black → tur...

 Solar Tracker using Arduino  Introduction A solar tracker is a device that automatically orients a solar panel toward the sun to capture maximum energy throughout the day. This project uses Arduino and LDR sensors to control servo motors that adjust the solar panel’s position. It’s ideal for renewable energy projects, academic demonstrations, and DIY applications. Components Required Arduino Uno Solar Panel 2 x LDR Sensors 2 x Servo Motors (SG90 or MG995) Resistors (10kΩ) Breadboard & Jumper Wires Battery / Power Supply Working Principle LDR sensors detect sunlight intensity in different directions. The Arduino reads LDR values and decides which direction the panel should face. Servo motors move the solar panel horizontally (east-west) and vertically (up-down). This dual-axis movement ensures maximum sunlight capture throughout the day, improving solar panel efficiency. Block Diagram Circuit Diagram Connect LDR sensors to analog pins (A0, A1) via resistors. Servo motors c...

Introduction : சூரிய சக்தியால் இயங்கும் ஸ்மார்ட் தெரு விளக்கு என்பது மின்சாரத்தை சேமிக்கும் புதிய தொழில்நுட்பம். இந்த திட்டம் Arduino மற்றும் சென்சார் அடிப்படையில் இயங்குகிறது. Components Required: Arduino Uno Solar Panel (9V or 12V) Rechargeable Battery LDR Sensor PIR Motion Sensor Relay Module LED Street Light / Lamp Connecting Wires Working Principle: பகலில், சோலார் பேனல் மூலம் பேட்டரி சார்ஜ் ஆகும். LDR சென்சார் பகல்-இரவு நிலையை கண்டறிகிறது. இரவில், PIR சென்சார் மனிதர்/வாகன இயக்கத்தை கண்டறிந்து ரிலே மூலம் LED விளக்கை எரியச் செய்கிறது. இது மின்சார சேமிப்பு மற்றும் தானியங்கி விளக்கு கட்டுப்பாட்டை வழங்குகிறது. Circuit Diagram : Arduino Code: int ldr = A0; int pir = 2; int relay = 8; void setup() {   pinMode(pir, INPUT);   pinMode(relay, OUTPUT);   Serial.begin(9600); } void loop() {   int ldrValue = analogRead(ldr);   int pirValue = digitalRead(pir);   if (ldrValue > 500) { // Dark condition     if (pirValue == HIGH) {       digi...

 Solar Battery Charger Circuit This project is designed to charge a 6V battery using a 9V solar panel efficiently. It uses an LM317 adjustable voltage regulator to control and stabilize the charging voltage, ensuring the battery charges safely without overvoltage. Main Components in the Circuit 1. Solar Panel (9V) Converts sunlight into DC voltage (approx. 9V). Acts as the main power source for the charger. 2. Diode D2 (1N4007) Prevents reverse current flow from the battery to the solar panel when there is no sunlight. Ensures battery charge is not lost at night. 3. Voltage Regulator (LM317) Adjustable regulator used to control the output voltage to match the battery charging requirement. Ensures smooth and regulated charging. 4. Capacitor C1 (0.1µF) Filters voltage spikes and noise, improving stability of the regulator. 5. Resistors R1 (220Ω) and R2 (680Ω) These form a voltage divider network with LM317 to set the output voltage. 6. Variable Resistor RP1 (2k Potentiometer) Used to...

  Automatic Street Light Controller Using LDR Introduction Street lights consume a lot of energy if they remain ON during the day. An Automatic Street Light Controller solves this by switching ON the light at night and OFF during the day automatically. This project uses an LDR (Light Dependent Resistor) to sense light intensity and control a 230V AC bulb through a relay. Circuit Diagram Block Diagram  Input: LDR (light sensor) Control Unit: Transistor switching + Relay driver Output: AC Street Light Block Diagram  Components Required LDR Standard Light Sensor       -1 BC547 Transistors NPN Type     -2 Resistor R1 1kΩ                           - 1 Variable Resistor RV1 100kΩ     -1 Diode D1 1N4007                          -1 Relay 9V SPDT              ...