A 5-channel mixer / preamplifier for piezo disks by Godfried-Willem Raes
Binoy's Tech Blog: Using a piezo-microphone
Guitar Contact Microphone Preamp : 7 Steps - Instructables
The Mint-box Piezo Buffer
Acoustic Guitar Pickup circuit & Wireless using TL071 | ElecCircuit.com
Building your own Piezo-Preamp – The Center for Haptic Audio Interaction Research
Collin's Lab: DIY Contact Mic - Make:
Simple Microphone to Speaker Amplifier Circuit Diagram
Simple Contact Microphone
Guitar FX Layouts: Acoustic Piezo Preamp
How to Build a Microphone Amplifier Circuit
Contact Mic - CircuitLab
operational amplifier - What is a good circuit for recording a piezo contact microphone or an electric guitar pickup? - Electrical Engineering Stack Exchange
Make this DIY Contact MIC Circuit | Homemade Circuit Projects
Piezo Preamp Experiment - Cigar Box Nation
Microphones
Piezo Preamps
Several Piezo contact mics with Arduino - Arduino Stack Exchange
DIY piezo preamp with hi-pass filter – breaks.berlin
Alex Rice Piezo Preamplifier – Zach Poff
A 5-channel mixer / preamplifier for piezo disks by Godfried-Willem Raes
Building your own Piezo-Preamp – The Center for Haptic Audio Interaction Research
How to Build a DIY Contact MIC Circuit
Alex Rice Piezo Preamplifier – Zach Poff
