Project Documentation

Project documentation covers a specific thing that was built — the design decisions, the trade-offs taken, and the analysis backing them. Where a report derives what a design has to satisfy, these pages show what was actually assembled and why.

Each project stands on its own and assumes no prior reading, though the theory behind a design is usually one link away.

JLI-2555 Tin Can Microphone

A purely analog proof-of-concept microphone built around a FET-less JLI-2555 electret capsule, designed to be reproducible at home with through-hole parts and no dedicated audio equipment. Covers the impedance converter, the pre-amplifier and gain calculation, the power supply, noise analysis, and the PCB layout.

Single page. Schematics and KiCad sources are in the project repository.

Inharmonicity Tuner

A real-time piano tuning application that analyses the harmonic content of a struck note, calculates the inharmonicity constant, and generates a tuning curve for the individual instrument. The documentation covers the DSP pipeline stage by stage: DC blocking, amplitude and smoothing, transient detection, and harmonic capture.

Assumes a basic working knowledge of digital signal processing.