Auto Light Energy Saver Kit with Arduino Mega + Servos – Build an Intruder-Activated Sentry System

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

Build a motion-activated Nerf sentry that conserves battery power by staying in deep sleep until an intruder is detected. This kit, centered around an Arduino Mega and SG90 servos, teaches you to integrate a PIR sensor, motor driver, and pan-tilt mechanism to create an autonomous security system. With a build time of just 5-6 hours, you'll have a working sentry that demonstrates real-world robotics concepts. Perfect for Smart India Hackathon, B.Tech ECE majors, or ATL Tinkering Labs, this project combines robotics and energy efficiency in a hands-on, exciting way.

What You'll Build

A fully autonomous sentry system that detects movement with a PIR sensor and immediately aims a flywheel-driven Nerf shooter at the target using precise servo positioning. You'll assemble the pan-tilt bracket, mount the motor and flywheel, and wire everything on the included breadboard. Once calibrated, the sentry will autonomously track and engage intruders with Nerf darts, all while saving power by sleeping between triggers. The system uses the PIR sensor's infrared detection, not lasers, ensuring safe operation.

What You'll Learn

• Program Arduino to interpret PIR sensor signals and trigger actions
• Control SG90 servos for precise pan-tilt movements
• Drive a DC motor with an L298N motor driver for Nerf dart launching
• Implement power-saving logic to keep the system in low power mode until motion is detected

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for B.Tech ECE/EEE students exploring sensor integration, CBSE Class 11-12 students working on energy-saving electronics projects, and ATL Tinkering Lab mentors running robotics workshops. It's also a great platform for IIT, NIT, and VIT students looking to prototype energy-efficient automation systems. If you're building a Smart India Hackathon prototype or a DIY home security system, this kit gives you a head start with ready-to-assemble parts and live build support.

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.