Lab3 - Laboratory for Experimental Computer Science

Here we show a little Theremin module which plugs onto a Arduino Board that gives out the tune to a speaker or puts out the tune as control signal like MIDI, Servo etc. We were using this device not only as a musical instrument, various kinds of proximity sensors, pointing devices or as interface in combination with Processing, Max or Pd have been build with this technique. How it Works The Theremin Module itself is as little LC type Radio frequency oscillator which generates a radio wave and gives out the frequency signal to the Arduino board. An Antenna connected to the LC resonator provides the Theremin effect when a person or some conductive material is placed next to the antenna. Video The Oscillator If you have a look at the Oscillator schematic you see the components L1 and C1 that are forming a resonator responsible for the oscillator frequency of about 4.1 Mhz. Care must be taken in the choice of the parts L1 and C1. TTL LC-type Oscillator schematic Oscillator Breadboard Layout

Make a Contact Microphone - 2 Parts 27mm diameter piezo bender, also known as a "buzzer element", such as this part from Digi-Key 8" length of 2-lead, shielded balanced microphone cable, such as Mogami W2582 1/4" inline female mono jack (sometime called TS or "tip-shield"), such as Rean/Neutrik NYS2202P cap from 20 oz pop bottle Tools soldering iron and solder wire strippers flush cut wire cutters 1/4" and 5/16" heat shrink tubing hot air gun or candle hot glue gun sandpaper About Piezo Elements (Benders) A piezo element is a metal disk with a circle of piezoelectric crystals in the middle. About Balanced Microphone Cables Since a piezo has 2 terminals, we need a cable with 2 conductors to connect to it.

Maxuino