Build a Portable AC Electromagnetic Field Probe with Arduino Uno & OLED

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

Detect invisible AC electromagnetic fields radiating from power lines, switchboards, and appliances with a handheld Arduino probe you build yourself. This kit equips you with a sensitive coil antenna, ACS712 current sensor, and op-amp signal conditioning to convert magnetic field strength into microtesla readings displayed on a crisp OLED screen. Whether you’re auditing electromagnetic interference for an electronics project or preparing a final-year B.Tech prototype, this kit turns theory into a working tool that logs data to microSD for later analysis. Using the principles of Faraday’s law and precision analog amplification, you’ll gain practical experience in signal chain design often reserved for professional lab environments.

What You'll Build

You’ll assemble a portable EMF probe that senses AC magnetic fields around power cables and converts the induced voltage into calibrated mT values. The OLED display shows real-time field strength, while the microSD module records timestamped measurements using the DS3231 RTC. The final device is battery-powered, encased in a prototype board layout you solder yourself, and ready for field testing or demo presentations. A 9V battery snap makes it completely mobile for on-site audits.

What You'll Learn

• Design and tune a coil antenna for AC magnetic field pickup
• Amplify and filter weak analog signals using an LM358 op-amp stage
• Interface ACS712 current sensor to Arduino for indirect field measurement
• Program I2C OLED displays and SPI microSD logging with real-time clock stamps

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

B.Tech ECE and EEE students tackling final-year projects or Smart India Hackathon hardware challenges will find this kit a perfect blend of analog design and embedded logging. ATL Tinkering Lab mentors can use it to demonstrate electromagnetic principles, while candidates preparing for technical interviews at IITs, NITs, or VIT gain hands-on experience with sensor integration and signal chain debugging. If you’ve ever wanted to see the magnetic noise around your home wiring, this probe makes it tangible.

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.

Choose your assembly option:

• Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
• Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.