Build a Magnetic Field Mapper with Arduino Uno & Hall Sensors – See the Invisible Forces Around Every Magnet

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 holding a device that reveals the shape of a magnetic field as you glide it over a magnet. This kit lets you build exactly that: a handheld mapper using two A3144 Hall sensors and an Arduino Uno that shows field intensity live on a crisp OLED screen. It turns a hidden physical phenomenon into a glowing, moving pattern right before your eyes.

What You'll Build

You’ll assemble a compact, breadboard-based tool that samples magnetic flux from two points, processes the readings on the Arduino, and displays a bar graph or numeric value on the 0.96-inch OLED. Sweep the sensors near any permanent magnet, and watch the display react in real time – brighter bars for stronger fields, quieter sections where the field weakens. The final build is battery‑powered and portable, perfect for classroom demonstrations or your next science fair.

What You'll Learn

• How Hall effect sensors convert magnetic flux into a measurable voltage
• Wiring and coding an OLED display to show live sensor data
• Processing analog inputs from two sensors simultaneously on Arduino
• Mapping field distributions and understanding why a magnet’s strength fades with distance

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Perfect for CBSE Class 11-12 students tackling physics practicals on magnetism, teachers running ATL Tinkering Labs, and young makers aged 8–15 who want a first real sensor project. IIT, NIT, and VIT engineering aspirants use it to grasp analog sensor fundamentals before diving into robotics. Even a curious 5-year-old can follow along with a parent, exploring the magic of invisible forces.

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.