Laser Tripwire Alarm with Arduino Uno - Beam Break Sensor Starter 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.

Create a laser security system that triggers a buzzer when someone walks through the beam. This project kit teaches light sensing and comparator circuits - perfect for school STEM fairs or a first Arduino project. No soldering needed, just breadboard connections and simple Arduino code.

What You'll Build

You'll assemble a working laser beam break detector on a breadboard. Aim the 5mW laser at the LDR; when the beam is interrupted, the buzzer sounds instantly. It's a fun introduction to optical sensors and alarm systems that can be demonstrated in classrooms or used as a room entry alert.

What You'll Learn

• Detect light beam breaks using an LDR and an LM393 comparator
• Interface a 5mW laser and active buzzer with Arduino
• Write Arduino code to trigger an alarm on beam interruption
• Construct circuits on a breadboard without soldering

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Ideal for young makers aged 10-15 exploring sensor technology, CBSE Class 7-12 physics and computer science students, ATL Tinkering Lab sessions, and entry-level hobbyists looking for a supervised STEM project. No prior electronics experience is required to get the alarm working.

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.