Tech & DIY / Schematics
Here's a list of various types of theremin schematics. You'll find tube theremins, transistor theremins, optical theremins, beginner, and advanced projects. If you're not sure where to start, we suggest reading through our theremin construction forum to get an idea of which schematic might be best for you.
Note, we've moved schematics and technical information for RCA theremins and the Keppinger theremins to their own pages.
A very simple CMOS 2-chip pitch-only theremin suitable for simple science fair projects.
Pierre has built a new tube theremin design based loosely on the RCA theremin. He has graciously shared his schematic and several sample sound clips with us!
This site shows you how to build a theremin using only parts available at your local Radio Shack!
Fred shares with us an all tube theremin project - complete with sound files! Don't miss the other cool theremin projects on his website while you're there!
Ever wanted to get rid of the "pop" when you turn on your Etherwave? Arthur Harrison has developed a mute-switch for the Etherwave that will do just that. It also adds a "mute status" light which doubles as a power-on light. Here's the schematic. Don't forget to browse the rest of Art's great site!
Look here for photos and schematics of two custom-made theremins. Both analog and digital models were built and are discussed on this site. I get a lot of questions about their digital theremin, so I've started compiling a FAQ. Feel free to contribute!
The full text and graphics for this article are now available online. The above link will take you to the files.
Long before even the first version of the Theremin Home Page, John Honniball from the University of the West of England faxed me this hand-drawn theremin schematic after I posted a request to a USENET newsgroup. I analyzed it with fellow engineering students and learned a lot about basic theremin design from this simple circuit. It is a "U.K.-ified" version of a 60's Moog theremin design.
This tube theremin article originally appeared in Radio and Television News in 1954. You might have trouble finding all the parts to build this theremin today, but the article is also an excellent source of technical information.
This person designed and completed a theremin for a class project at CalTech. He's graciously provided both a writeup with excellent technical information and schematics for his project. I finally got the original postscript files back, and they are available below in GZIP format:
This short article from Popular Science shows you how to build a small optical theremin for under $20 in about 3 hours.
Hand-drawn by Bob Moog, these schematics will give you insight into Prof. Theremin's original design concepts. schematic page 1, schematic page 2. Also available are the technical notes Bob Moog wrote while working on her theremin. Adrian Bontenbal also provided some additional tech notes on this circuit with details that are hard to make out from Bob's schematic as well as some bonus circuits.
An optical theremin using IR sensors to control pitch and octave (instead of pitch and volume).
Build an optical theremin out of LEGOs! Step by step instructions, schematics, and a demonstration video are provided.
Art Harrison shares his latest theremin designs with the world! Be sure to check this one out for clear directions and excellent technical description.
This is a demo of Forrest Mims, III’s Audible Light Meter. This photo-theremin design was originally published in Optoelectronic Projects Vol 1, published by Radio Shack in 1976.
The Open.Theremin is a open hardware and open software theremin project. The modular system consists of a RC or LC heterodyne oscillator module and a micro controller UP module with interface and supply circuits.
Kendrick Sellen Tube Theremin Schematics.
Designed by Russell Kincaid, and posted Craig Kendrick Sellen
Online version of the schematic for the popular DIY theremin kit from PAiA.
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.
These schematics / code / layouts are for the Skywave H1 Pitch-only “Theremin”. 16 of these were built and operated in the Royal Festival Hall (South-bank arts centre) for 10 days in 2010. Includes schematic, parts list, and circuit board patterns.
Robert George supplied this schematic for his Kustom theremin, originally based on the Moog Melodia theremin.
Phil Nelson has shared the 1955 schematic on his antique radio website.
Theremin World member Adrian Bontenbal shared this article with us detailing how he built a transistor theremin inside a wooden wine box.
A pitch only theremin schematic designed by noted theremingineur Thierry Frenkel. Designed to be built from readily available parts and to perform well. Perfect for the hobbyist, for science fair projects, or for anyone who wants to scratch build a working theremin!
A great write-up on a custom vacuum tube theremin built by John Polstra of Channel Road Amplification. The article features schematics and discussion to explain design choices.
"Cool Jason. This is ROSS MARSHALL.Just uploaded my old theremin videos.Plus my new TUBE THEREMIN by John Polstra- who amazingly lives off on the Lope..."
"Anyone have an idea what a 91B would be worth these days ?"
"This seems like a most worthwhile project. I am curious as to why no one has expressed any enthusiasm so far. "
"Coil in resonance."
