PIR Motion Sensor Starter Kit: Build a Simple Motion Alarm with Arduino Uno

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

Imagine walking into a room and triggering a hidden sensor that sets off a flashing LED alert and a loud buzzer — that's exactly what you'll build with this PIR motion sensor kit. Perfect for keeping nosy siblings out of your room or for your first school science project, this kit turns the HC-SR501 infrared sensor into a practical alarm system you program yourself. No complicated tools or prior knowledge required; just plug the components onto the breadboard, upload the code, and watch invisible motion turn into light and sound.

What You'll Build

A working motion alarm that lights up red LEDs and sounds a buzzer whenever someone enters the detection zone. You'll assemble the entire circuit on a 400‑point breadboard, connect the PIR sensor to Arduino Uno, and test different detection patterns — you can even adjust the sensor's range and pulse time to catch only slow or quick movements.

What You'll Learn

• How a PIR sensor detects infrared radiation from moving humans and triggers a digital signal
• Wiring an active buzzer and multiple LEDs to Arduino and controlling them with code
• Reading digital input from a sensor and using it to make decisions in a program
• Powering a portable project with a 9V battery and managing current with resistors

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

If you're a CBSE Class 9-10 student looking for a simple electronics project, or a parent introducing your child to STEM at home, this kit is ideal. It's also perfect for ATL Tinkering Labs and beginner robotics workshops. No prior coding experience required — our AI companion can guide you through block-based or text-based Arduino code, making it a favourite for school science exhibitions and hobby projects alike.

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.