I had a fun weekend:
Theremin from Popular Electronics 1967
Theremin kits
The 1999 Minimum Theremin
Minimum Theremin Kit Schematic
GetLoFi - Circuit Bending Synth DIY - Minimum Theremin
Theremin Kits
Capacitive Sensors - An Overview
Capacitive Sensor Operation and Optimization - (How Capacitive Sensors Work and How to Use Them Effectively)
The art of capacitive touch sensing
Capacitive sensing - From Wikipedia
Ask The Application Engineer - Capacitance Sensors for Human Interfaces to Electronic Equipment
iPod Click Wheel
Atmel Touchscreen Technology
AT42QT4160 - Easy to Use Touchscreen Controller Solution for Single Layer Sensor Implementations
AT42QT5320 - Versatile Two-touch Touchscreen Solutions
Capsense with Arduino
CapSense
Knock Sensor
How to connect and use a piezo sensor with the Make Controller Kit.
Piezoelectric sensor
FlexiForce Sensor Model A201.
DIY Force Sensitive Resistor (FSR)
Force Sensing Resistors
Engineers create transparent electrodes for display screens
Innovative transparent electrode for flexible displays
Transparent electrode, optoelectronic apparatus and devices
Electromyography (EMG) - is a technique for evaluating and recording the activation signal of muscles.
Could anyone of you come up with a myoelectric sensor?
The Open Prosthetics Project - Myoelectric