Build Your Own EMI Emissions Tester to Debug PCBs — Arduino Mega and TFT Spectrum Analyzer Kit

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

Every PCB radiates unintended electromagnetic noise. This kit turns an Arduino Mega into a portable spectrum analyzer that uses a simple wire antenna to capture those emissions and plot them live on a TFT. It’s the missing instrument on a maker’s bench — a go‑to for quick pre‑compliance checks, school projects, or learning how conducted and radiated EMI behaves on real boards.

What You'll Build

You’ll assemble a handheld instrument that senses radiated EMI through a wire probe, amplifies the tiny signal with dual op‑amp stages, digitises it with a 16‑bit ADS1115 ADC, and displays a rolling frequency spectrum on a 1.8‑inch colour TFT. By hovering the probe over different areas of a PCB, you’ll immediately see which sections leak the most noise — a practical skill used by EMC engineers every day.

What You'll Learn

• Interfacing a high‑resolution ADS1115 ADC with an Arduino Mega over I²C for accurate analogue sampling.
• Designing a two‑stage signal‑conditioning front‑end with LM358 op‑amps to boost and filter the antenna signal.
• Understanding spectrum analysis, FFT basics, and how radiated EMI correlates with high‑speed digital traces.
• Soldering a complete instrument on a prototyping board — a skill that bridges breadboard testing and final PCB design.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

CBSE Class 11–12 students exploring electromagnetic induction and EMI find a tangible way to link theory to a live spectrum plot. B.Tech ECE/EEE undergraduates use it as a mini‑project for EMC labs or Smart India Hackathon prototypes. ATL Tinkering Labs and engineering colleges (IIT, NIT, VIT, BITS) running final‑year projects get a ready‑to‑build instrument that teaches analog design, microcontroller coding, and the basics of PCB debugging in one go.

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.