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BUILD YOUR OWN BLENDER: RE:MIX IS OPEN-SOURCE AND FULLY REPAIRABLE

A kitchen blender you can build, repair and never throw away.

by Open Funk

FULL CAD BOM FIRMWARE DOCS

HomeOpen-hardware

Built with3D printing

difficulty
●●●●○
time
a few weekends
license
CERN-OHL-S-2.0
repo
repo ACTIVE206 stars

WHAT YOU’LL NEED

Videos
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COMPAREE VERDICT

re:Mix is a real, sold kitchen blender from Open Funk in Berlin, and its maker has opened up the body: the mains motor, rotary speed switch, wiring, CNC-milled recycled-HDPE panels and 3D-printed parts all come with STEP/STL files, a BOM with exploded views and a step-by-step assembly guide. What is still missing is the blender head's CAD: it was planned for summer 2026, but as of October 2026 it is not in the repository. The good news is that the assembly guide already lists the head parts and shows how the head goes together, and Open Funk sells the blades head as a spare, so a complete blender is within reach. The README is blunt that this is for experienced users only: it runs on mains power, it is not a CE-certified appliance, and it should be treated as a prototype. If you are comfortable wiring a mains motor, it is one of the few appliances designed from the start to be opened, repaired and rebuilt.

GOOD TO KNOW

  • —Body CAD files (3D-printable parts, housing) are public on GitHub now.
  • —The body with the motor and electronics was released in December 2023; the blender head was planned for summer 2026 and is not in the repository as of October 2026.
  • —The repo has a technical description, a BOM with exploded views and an assembly guide for the released body.
  • —Licence is CERN-OHL-S v2 (strongly reciprocal) — you can modify and sell, but must share your changes under the same licence.
  • —The product is also sold complete by Open Funk; the open-source release is explicitly to enable repair and customisation, not to replace the commercial offering.
  • —It blends directly into standard TO82 twist-off glass jars; for the blade unit you either wait for the head files or buy the blades head from Open Funk.

Parts to buy

10 items

From our check of the build. Exact quantities and part numbers are in the creator’s BOM.

  • MotorFind
  • Rotary switchFind
  • Micro switchFind
  • Power cableFind
  • O-ringsFind
  • KnobFind
  • Suction feet and screwsFind
  • CNC-milled or printed panelsFind
  • TO82 twist-off jarsFind
  • Blades head from Open Funk until its files are outFind

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Can I build this?

PrintBlender socket, motor adaptor, switch holder, ventilation pipe and grid and small parts (Open Funk uses ASA); the outer panels are CNC-milled recycled HDPE in the original, with STL versions provided
BuyThe motor, rotary switch, micro switch, power cable, O-rings, knob, suction feet and screws from the BOM; CNC-milled or printed panels; TO82 twist-off jars; the blades head from Open Funk until its files are out
Tools3D printer, soldering iron, multimeter, hand tools, possibly a lathe or mill if the head assembly needs custom machining
SkillsIntermediate CAD and 3D printing, motor wiring and control, mechanical assembly — advanced if you need to adapt the head design yourself before the full files arrive
TimeA few weekends: printing and milling the body parts, then wiring and assembly following the guide.
Cost$$ — the project publishes no DIY cost; for comparison, Open Funk sells the finished blender for about 349 euros (refurbished from about 249 euros) and the blades head alone for about 39 euros.
SafetyMains-voltage motor wiring and high-speed blades. The design has a micro-switch interlock so the motor should only run with the head and jar locked in; test that it works before first use. Not a CE-certified appliance — treat it as a prototype.

This build involves mains voltage — for adults comfortable with electrical work only.

Build at your own risk. Projects involve tools, electronics and sometimes mains voltage — follow the creator’s safety notes.

Videos

How to do hummus with re:Mix

Open Funk's own demo of re:Mix in use; for the design story see iFixit's video below. There is no assembly walkthrough video.

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Start here

Navigation into the creator’s own docs — we don’t rewrite the guide, we route you to the source.

  1. 1.Read the project page (Open Funk's official page — in German, but has photos and the link to the GitHub repository)
  2. 2.Check what is actually released(The body (motor, electronics, panels, printed parts) is released with a BOM and assembly guide. The blender head CAD was planned for summer 2026 and is not in the repository as of October 2026.)
  3. 3.Print the body and base(Open Funk prints the body parts in ASA on an Original Prusa i3 MK3S; the biggest printed part, the ventilation pipe, is about 113 x 84 x 92 mm. Test-fit the socket with a TO82 twist-off jar.)
  4. 4.Wait for the head files, or buy the blades head from Open Funk's shop(The assembly guide already lists the head parts (blade, seals, printed head) and shows how they fit; only the CAD for the printed head parts is missing.)

Resources

Documentation, files and community threads for this build — we link straight to the original sources and never rehost the creator’s files.

KNOWN ISSUES

  • The blender head CAD is not released yet: it was planned for summer 2026 and is still missing as of October 2026. You can build the motorised base now and buy the blades head from Open Funk, or design the head yourself.
  • The BOM and assembly guide cover the body and list the head parts, but the CAD files for the printed head parts are not published yet.
  • The jar must be a TO82 twist-off glass jar (82 mm lid), the kind used for supermarket jams and sauces — not a mason jar. Check your jars before you count on them.
  • High-speed rotating blade assemblies are unforgiving. If the motor mount or bearing alignment is off by a millimeter, the blender will vibrate, overheat, or worse. Test-run the assembly at low speed before blending anything.
  • The motor runs on mains power. The README says the project is for experienced users only and that the self-built mixer is not a CE-certified appliance, so if you have never wired mains devices, this is not the project to learn on.
  • The licence is CERN-OHL-S v2 (strongly reciprocal). If you modify and distribute the design, you must release your changes under the same licence. If you are building this to sell modified units, read the licence terms carefully.

Can I build the whole thing now?

Not fully from files yet. You can build the motorised base with its electronics now; the CAD for the printed blender-head parts was planned for summer 2026 and is not out as of October 2026. The assembly guide already lists the head parts, and Open Funk sells the blades head as a spare.

What motor do I need?

The motor and its mounting are part of the released body — use the one listed in the BOM.

Is there a BOM or assembly guide?

Yes. Start with the 'Technical documentation, BOM and Assembly Guide' PDF; it covers the body and also lists the head parts. Only the CAD files for the printed head parts are still to be published.

Can I sell blenders built from these files?

Yes, the CERN-OHL-S v2 licence allows commercial use, but you must share any modifications under the same licence. Open Funk also sells the complete product, so you would be competing with the original maker.

Why glass jars?

re:Mix blends straight into standard TO82 twist-off glass jars (82 mm lid), the kind many supermarket foods come in, so reused jars replace a dedicated plastic jug.

Community builds

No community builds yet — be the first, we feature the best ones.

Discussion1

FROM THE COMPAREE TEAM

The motorised body is fully open, but the blender head's CAD is still not out. Would you build the base now and buy the blades head, or wait until every part is open?

CompareeTEAM2mo agoedited

Practical notes from our verification: the repository is openfunkHQ/reMix on GitHub, maintained by Open Funk, and it contains a technical description, an assembly guide, a bill of materials, STEP files for the CNC-milled parts and STL files for the 3D-printed parts. The release is in two phases: the body including electronics came out in December 2023, and the blender head is planned for summer 2026, so you cannot build a complete blender from the repo yet. The licence is CERN Open Hardware Licence v2, Strongly Reciprocal, which allows commercial use but requires you to publish your modified design files under the same terms. The README is explicit that this is for experienced users, is not a certified kitchen appliance, and should be treated as a prototype — you are working with mains electricity and a motor. Correction (4 October 2026): we re-checked this page line by line against the project's own repository, documentation and videos, and fixed errors in earlier versions.

Open Funk

Open Funk is a Berlin company that designs and locally manufactures open-source, repairable home electronics. re:Mix, its first product, is a blender with a recycled-plastic casing, and the design is being opened up in stages so people can repair, modify and build it.

Web

Star the project on GitHub

DISCLAIMER

  • Comparee is not the author of the projects featured here. All rights to each project belong to its creator — every page links to the original source, and we never host creators’ files.
  • Information is provided without warranty and may become outdated as projects evolve. Prices are indicative bands only — always check the creator’s parts list for current costs.
  • Building and operating any project is at your own responsibility. Protective equipment, safe workshop practice and compliance with local regulations are the builder’s responsibility.
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