Day 08 – Automatic Night Lamp Using LDR Sensor | 100 Days 100 Arduino Projects Challenge 💡🌙

Описание: 🚀 Welcome to Day 08 of my 100 Days – 100 Arduino Projects Challenge!

In today’s project, we are building an Automatic Night Lamp using an LDR (Light Dependent Resistor) and Arduino.

This system automatically turns ON the LED when it gets dark and turns OFF the LED when there is light.

LDR sensors are commonly used in:
• Automatic street lights
• Smart home lighting
• Solar garden lights
• Energy saving systems

This project helps beginners understand analog sensors and real-world automation.

⸻

🔧 Components Used
• Arduino UNO
• LDR (Light Dependent Resistor)
• 10kΩ Resistor
• LED
• 220Ω Resistor
• Breadboard
• Jumper Wires

⸻

🟢 Circuit Connections

LDR Circuit:
• LDR → 5V
• Other LDR leg → A0 + 10k resistor to GND

LED:
• LED (+) → Pin 8
• LED (–) → 220Ω → GND

⸻

💡 What You Will Learn
• What is LDR sensor
• How analogRead() works
• Light detection system
• Basic automation project


💻 Source Code.

in comment pined

🔎 How It Works

analogRead() reads values from 0 – 1023

Example:

Bright light → Higher value
Dark → Lower value

So when the value drops below 500, the LED turns ON.

⸻

🔥 Day 08 Completed
92 Projects Remaining!

⸻

🚀 Next Project

👉 Day 09 – Automatic Street Light Using LDR