This is the KLANGBAUM!

Rendered on 2022-10-16, Prickle-Prickle, the 70th day of Bureaucracy in the YOLD 3188

DIY Phantom Powered Contact Mics



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
PCB etching process
Test assembly
Capacitor selection tests