Build a Sub-Nyquist Compressive Sampler with Arduino Mega — Go Beyond Nyquist Limits

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

Break away from textbook Nyquist theory and build a real, working compressive sampler. This kit captures sparse analog signals well below the traditional sampling rate using a random binary sensing matrix, then recovers the original waveform with a compressive sensing algorithm running entirely on the Arduino Mega. It’s a powerful way to demonstrate advanced signal processing in a hands-on project suitable for final-year engineering work or research prototyping.

What You'll Build

You'll wire the AD9833 signal generator as a known sparse source, condition its output with an LM358 op‑amp stage, and apply a pseudo‑random binary pattern through two 74HC595 shift registers before the ADS1115 ADC digitizes at a low rate. The reconstructed signal appears on the 1.8‑inch TFT display, showing sub‑Nyquist sampling in real time. The entire assembly fits on the included prototype boards, giving you a permanent, demonstrable hardware platform.

What You'll Learn

• Implement a random binary sensing matrix using cascaded shift registers for compressive acquisition
• Configure the 16‑bit ADS1115 ADC for low‑rate sampling and interface it with Arduino Mega via I2C
• Program a basic orthogonal matching pursuit (OMP) reconstruction algorithm on the Arduino platform
• Generate programmable test signals with the AD9833 DDS and condition them with active op‑amp filters

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Engineered for B.Tech ECE/EEE final‑year students tackling compressive sensing projects, research scholars prototyping sparse recovery hardware, and Smart India Hackathon participants who need a ready‑to‑go demonstrator. If you have a working knowledge of Arduino IDE, basic signal processing theory, and are comfortable with soldering, this kit transforms a complex concept into a tangible, working model in a single build session.

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.