Build an Automatic Night Lamp: Arduino Uno & LDR Beginner Home Automation Kit

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Imagine a lamp that knows when it's dark and lights up automatically, no switch needed. This kit lets you build exactly that — a real home automation gadget you can place on your desk or bedside. You'll learn how an LDR (light-dependent resistor) senses ambient light, how the Arduino Uno reads its signal, and how a transistor acts as a smart switch to turn five bright white LEDs on or off.

What You'll Build

You'll build a breadboard circuit where the LDR constantly monitors room brightness. When it gets dark, the Arduino triggers the BC547 transistor, which lights up the five LEDs just like a night lamp. The entire project runs on a 9V battery, so it's portable and safe. You can adjust the darkness threshold in code, customizing when the lamp turns on.

What You'll Learn

• How to read an analog sensor (LDR) with Arduino's analog input
• How to use a transistor as a switch to control higher-current LEDs
• Basic breadboard wiring and component identification
• Arduino programming: analogRead, digitalWrite, and threshold logic

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for CBSE class 11-12 students, ATL Tinkering Lab participants, and first-year B.Tech ECE/EEE students. Also great for hobbyists and parents introducing coding to kids aged 10+.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.