Build a PIR Motion Alarm with Arduino Uno – Beginner Kit for Kids & Students

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

Create a real-world security alarm that lights up a red LED and sounds a buzzer the moment someone walks by. This PIR motion sensor kit introduces you to the most common sensor used in automatic lights, burglar alarms, and smart home gadgets — and you'll have it working in under two hours.

What You'll Build

A working motion alarm that flashes three high-brightness red LEDs and triggers an active buzzer whenever the HC-SR501 PIR sensor detects a person. You’ll assemble the circuit on a breadboard, connect everything to an Arduino Uno, and upload code that makes the alarm respond instantly. The project is self-contained and portable with a 9V battery, so you can demo it anywhere.

What You'll Learn

• How to wire a PIR sensor and interpret its digital output
• Controlling multiple LEDs and a buzzer with Arduino digital pins
• Using resistors for current limiting and pull‑down configurations
• Writing and uploading a simple Arduino sketch that includes digitalRead and digitalWrite

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for young makers in CBSE schools, ATL Tinkering Labs, and STEM beginners aged 5–15. Also perfect for parents and educators running weekend electronics activities or introducing sensor-based projects. B.Tech freshers wanting a quick hands-on intro to Arduino will find it valuable too.

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.