OpenTheremin with BreakOut connector

The OpenTheremin V4 has received its first update. The new Version 4.5, now available in the store, includes a new break-out connector that opens up exciting expansion and customization possibilities. Additionally, this update enhances compatibility with the Eurorack norm through minor dimension adjustments. Get the latest OpenTheremin now and be prepared for upcoming expansions.

More Creative Builds

I want to share with you some new build videos and pictures. Davide Gatti made a nice build video on his YouTube channel for our Italian speaking community. The 3D printed housing he uses was published by Sergey Mashchenko and can be found on Thingiverse here. And then I uploaded beautiful creative build for kids here. Thank you all for sharing your great work with our community.

New OpenTheremin Version 4

In celebration of the 125 year anniversary of inventor Lev Sergeevich Theremin, we are happy to introduce the new OpenTheremin Version 4. The redesign was realized in collaboration Danish designer Peter van der Beek. As a young and uprising designer Peter van der Beek, Design Academy Eindhoven, decisively shaped the fourth version of OpenThermein with courageous decisions. In the good tradition of Danish Design Peter relies on pure form-giving design, knowledge of materials and attention to details.

First batch available in now:


Because you asked for it

A deluxe box with all you need to start playing the Open.Theremin right away. No-soldering and pre-programmed. Including a folable stand, Arduino compatible board and USB cable. All in a nice box. Now in limited number on


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