Arduino Uno Senior Movement Alert Kit: Build a Smart Night Light for Elderly Safety

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 your grandmother moving through a dark corridor at night, and a floodlight turns on automatically—but only when it's truly needed. You'll build exactly that: a movement-activated safety light that uses an HC-SR501 PIR sensor to detect motion, triggers a relay-driven floodlight for two minutes, and reads ambient light with an LDR to disable the trigger entirely during the day. This is a real-world assistive technology project that combines sensor integration, threshold logic, and safe high-voltage switching.

What You'll Build

A fully functional automated lighting system that responds to human presence only in low-light conditions. The PIR sensor waits for motion, the Arduino processes the triggered signal after checking the LDR’s daylight status, and the relay module controls a 12V floodlight (or any appliance up to 10A). You’ll calibrate sensor timing and lux thresholds, mount the finished unit on a breadboard, and walk away with a product that can be installed in a hallway or bathroom for immediate elderly care use.

What You'll Learn

• Interfacing the HC-SR501 PIR sensor and adjusting its delay time and retriggering settings for precise motion windows.
• Reading ambient light using an LDR voltage divider, setting a software threshold, and debouncing light transitions to avoid flicker.
• Controlling a high-power load safely through a 5V relay module, including flyback diode protection with the 1N4007.
• Writing Arduino code that manages non-blocking timing—keeping a 2-minute floodlight ON period without pausing other sensor checks.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for CBSE Class 11–12 students building physics or computer science practicals, first-year B.Tech ECE/EEE undergraduates exploring embedded systems, and ATL Tinkering Lab participants prototyping assistive devices for the Smart India Hackathon. If you’ve already done a basic LED blink and want to tackle a project with genuine social impact—this is your next step.

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.