This presentation and live demonstration explores a cross section of affordable hardware and open-source tools for hands-on exploration of digital filters.

Hardware & Capture

• 40 Msps, 20-bit ADC with an internal data-capture buffer
• Built-in digital filters: SINC1, SINC5, and brick-wall
• No FPGA required — the internal buffer lets a basic microcontroller transfer data to a host

Data Path & Software

• Industry-standard IIO (Industrial Input/Output) framework for streaming
• Compatible with C, C++, C#, MATLAB, and Python

Demos & Analysis

• Short Python scripts and Jupyter notebooks using NumPy and SciPy
• Low-cost USB instruments generate test signals: sinewaves, steps, wavelets, and noise bands
• Analysis verifies filter properties and behavior
• USB sound cards explored as budget sources/sinks vs. benchtop instruments