Theremin Part 2: Pitch Reference Oscillator and Box Lower Section

Presenting the files needed to reproduced what done so far for the Theremin project.

As promised in the YouTube series on the Theremin, here are the files of the parts already designed that you’ll need to build a Theremin like mine:

  • The Pitch Reference Oscillator Schematics: pitch_reference_oscillator
  • A zip file for the bottom section of the Theremin box, containing the OpenSCAD file, the .stl file and the .gcode file: box_base.
  • A zip file containing the inkscape versions of the front and back panel artworks, along with a png version: theremin_panels

Once you build the Pitch Reference Oscillator, remember to tune it to 172 kHz, by acting on the variable capacitors C6 and C7. You do so by measuring the frequency while changing the capacitance of C6 and C7. The frequency can be measured with an oscilloscope or a multimeter that is capable of measuring frequencies. The tuning should be done while the potentiometer RV1 is in the middle position.

Expect to see more of this in the next posts, once the other pieces of the Theremin will be built one at a time and the corresponding videos will also be posted on YouTube.

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See you soon with more of this and, in the mean time, happy experiments!


I am an old school electronics engineer, but I worked almost forever doing software development for the big telecommunication companies suppliers. I have recently decided that it was time to start digging into my old knowledge and make a hobby out of it. I have several subjects in mind that I would like to explore: robotics, electronic musical instruments, home automation, and so forth. Let’s make this journey together! We can surely learn a lot of new things from each other. Drop me a comment! I look forward to hear your thoughts!

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