This is the KLANGBAUM!

Rendered on 2024-12-24, Pungenday, the 66th day of The Aftermath in the YOLD 3190 [?]

DIY Phantom Powered Contact Mics

DIY

Abstract

A contact microphone is a kind of transducer that senses audio vibrations through contact with solid objects. Unlike normal air microphones, contact microphones are almost completely insensitive to air vibrations but transduce only structure-borne sound (source: Wikipedia).

DIY Contact Mic

My contact microphone is entirely DIY and is based on the Alex Rice priezo preamp as described by Zach Poff.
I've done the PCB routing using eagle and I've etched it using UV method.

PCB etching process 3264x2448 823.6 kB
PCB etching process 3264x2448 813.1 kB
Test assembly 2448x3264 900.6 kB
Capacitor selection tests 3264x2448 847.0 kB