GSM Phone Call Alert Kit: Build a Phone-Call Security Alarm with Arduino Uno

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

Imagine a security system that calls your phone the moment an intruder steps into your room. With this kit, you'll assemble a SIM800L-based GSM alarm that dials a preset number when the PIR sensor detects motion. It's a real-world electronics project that introduces wireless communication and sensor integration in a single, practical build.

What You'll Build

A self-contained voice-call alarm system. When the HC-SR501 passive infrared sensor detects a person, the Arduino triggers the SIM800L module to place a phone call to your mobile. The red LED flashes to indicate an alert. Mount it at your door, shop counter, or classroom to monitor entry instantly.

What You'll Learn

• Wiring a GSM module (SIM800L) with Arduino Uno
• Configuring the SIM800L to place voice calls in code
• Using a PIR motion sensor to detect human presence
• Power management with a buck converter and capacitors for stable GSM operation

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Perfect for ATL Tinkering Lab students, CBSE Class 9–10 electronics enthusiasts, and DIY families. If you're exploring Arduino and want a tangible security system that works with any GSM SIM card, you'll find this kit approachable and rewarding. It's also an excellent starter project for B.Tech ECE students demonstrating wireless sensor integration.

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.