Light Chasing Robot Kit with Arduino Uno + LDR
Light Chasing Robot Kit with Arduino Uno – Build a Robot That Follows Light
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
In this project, you assemble a two-wheeled robot that reads light levels through paired LDR sensors and autonomously steers toward the brightest source. It’s a hands‑on introduction to sensor‑based autonomy — perfect for anyone curious about how machines can perceive and react to their environment using simple analog electronics.
What You'll Build
A compact, battery-powered robot on a 2WD chassis that constantly compares analog voltage from left and right LDR pairs. When you shine a flashlight, the robot calculates the difference and adjusts motor speeds on each side, smoothly curving toward the light. The result is a persistent, almost life‑like pursuit that’s as fun to watch as it is to program.
What You'll Learn
- Interfacing LDR sensors with Arduino analog input pins
- Reading and comparing analog values to make real‑time directional decisions
- Controlling TT gear motors using an L298N motor driver and PWM signals
- Implementing differential steering logic that turns raw sensor values into smooth chasing motion
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Uno R3 | x1 |
| LDR | x4 |
| L298N Motor Driver | x1 |
| TT Gear Motor | x2 |
| Castor Wheel | x1 |
| 2WD Chassis | x1 |
| 10kΩ Resistors | x10 |
| 100nF Caps | x5 |
| 18650 Cell | x2 |
| 18650 Holder | x1 |
| M-M Wires | x25 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Ideal for CBSE Class 11-12 students exploring sensor-based robotics, ATL Tinkering Lab clubs, and B.Tech first-year project learners. The simple wiring and clear coding exercise make it accessible for ages 10 and above, but younger builders (8+) can assemble the chassis with adult supervision. It’s a favorite for school science exhibitions and maker‑space days across India.
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.
What if I get stuck during the build?
Scan the QR code on the box to open the AI companion. It provides step‑by‑step circuit diagrams, full code explanations, and common troubleshooting — backed by real‑human WhatsApp support if you still need help.
Do I need programming experience to complete this project?
No. The included Arduino sketch is fully commented, and the companion walks you through each line. You’ll learn analogRead(), digitalWrite(), and how to control motor direction as you build.
Why are there four LDRs when the robot only uses two for steering?
The extra two LDRs let you experiment — you can add side‑looking sensors or build a more advanced omnidirectional light‑chaser. The core project starts with just two, and the companion suggests optional upgrades.
How long do the batteries last while chasing light?
With the included 18650 cells (2600mAh typical), the robot runs for 3–4 hours of continuous chasing. Recharge with any standard 18650 charger and you’re ready for more light‑seeking action.
Two LDRs steer the robot toward the brightest light source. Introduces analog differential reading and motor direction.
What's in this kit
- Arduino Uno R3
- LDR x4
- L298N Motor Driver
- TT Gear Motor x2
- Castor Wheel
- 2WD Chassis
- 10kΩ Resistors x10
- 100nF Caps x5
- 18650 Cell x2
- 18650 Holder
- M-M Wires x25
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items