Build a Smart Pet Feed Dispenser with Arduino Uno - Verify Inverse Square Law of Magnetism

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

Build a Smart Pet Feed Dispenser that uses an electromagnet to release precise portions of food - and simultaneously become a magnetic force investigator. This kit places a 1 kg load cell at the heart of an experiment: measure the pull between a 12V electromagnet and an iron piece as you vary the gap, then watch the inverse square law unfold on the 16x2 LCD. Ideal for CBSE Class 11-12 Physics practicals, B.Tech ECE/EEE sensor labs, or a Smart India Hackathon prototype that merges automation with fundamental physics.

What You'll Build

You'll assemble a functional dispenser where the electromagnet holds a metal latch; energize the relay to release it and drop a measured amount of food. The load cell under the bowl tells you exactly how much was dispensed. But the real power of this kit lies in its second mode: mount the iron piece directly on the load cell, hold the electromagnet at set distances, and log the attractive force. The LCD displays force in grams and gap in millimetres - raw data to plot the inverse square curve yourself.

What You'll Learn

• Calibrate and read a load cell with HX711 amplifier to measure force in grams
• Control a 12V electromagnet via a relay module using Arduino Uno
• Plot and validate the inverse square law of magnetic force vs. distance
• Design an automated dispensing system with feedback control and real-time display

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit directly serves CBSE Class 11-12 students pursuing Physics investigatory projects on magnetic fields and inverse square law. B.Tech ECE/EEE students will use it for sensor integration and automation labs. It's also a ready-made base for Smart India Hackathon teams tackling pet care or force-measurement themes, and fits the equipment lists of ATL Tinkering Labs. Even IIT/NIT/VIT/BITS students can prototype a data-logging magnetic force rig within a weekend.

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.