x0x-heart Eurorack Module

by Open Music Labs

The heart of a TB303 synth recreated in modular format.


  • Jason R

    Kanata, Canada

  • Bradley G

    Melbourne, Australia

  • David C

    Long Beach, CA

  • Pascal B

    Zurich, Switzerland

  • Oliver B

    Zuerich, Switzerland

  • Scott B

    Oakland, CA


    Suginami, Japan

  • Samuel E

    Münchenstein, Switzerland

  • Tobias S

    Berlin, Germany

  • Daniel P


  • Chris C

    Bend, OR

  • jeff f

    Boston, MA

  • Holger Prang B

    Hamburg, Germany

  • william s

    San Diego, CA

  • Avery B

    New York, NY

  • Thomas d

    Sceaux, France

  • Mario L

    Graz, Austria

  • Peter M

    1967 Bramois, Switzerland

  • Scott P

    Wilmington, DE

  • Andrew S


  • Don Derek H

    Cambridge, MA

  • Simon L

    København N, Denmark

  • Olivier B

    Montreal, Canada

  • Peter M

    Bramois, Switzerland

  • Adam B

    Bristol, United Kingdom of Great Britain and Northern Ireland

  • Scudder S

    Kennett Square, PA

  • Jeroen V

    Amsterdam, Netherlands

  • JOHN W

    BRISTOL, United Kingdom of Great Britain and Northern Ireland

  • Aaron T

    Healdsburg, CA

  • Justin F

    Cooperstown, NY

  • Thomas I

    Seattle, WA

  • Donna G

    Hope, ME

  • NEAL O

    DUBLIN 8, Ireland

  • Colin S

    Stoke on Trent, United Kingdom of Great Britain and Northern Ireland

  • Andrew N

    San Francisco, CA

  • Jeff G

    Portland, OR

  • Colin H

    Langley, Canada

  • Nicholas B

    London, United Kingdom of Great Britain and Northern Ireland

  • Michael S

    Berlin, Germany

  • Christian S

    Drensteinfurt, Germany

  • Thom E

    Waco, TX

  • Daniel C

    Montréal, Canada

  • Philip W

    Brooklyn, NY

  • Yujiro K

    Koganei, Japan

  • Robert S

    Clarkston, MI

  • Jared S

    Casselberry, FL

  • kieran w

    berlin, Germany

  • Benjamin S

    Royal Oak, MI

  • Jason V

    Makawao, HI

  • Joseph S

    Redford, MI

  • Sam A

    Somerville, MA

  • James W

    Harker Heights, TX

  • David F

    Bristol, United Kingdom

  • John A

    Seattle, WA


    CAMBRIDGE, United Kingdom

  • Antony F

    Danville, CA

  • Jeff S

    Portland, OR

  • Adam P

    Columbia Heights, MN

  • Gunnar Torfi J

    Reykjavik, Iceland

  • Jeff S

    Irving, TX

  • Morgan A

    San Francisco, CA

  • Martin G

    Santa Barbara, CA

  • Anthony C

    Youngstown, OH

  • guillaume g

    saint julien les villas, France

  • Graeme N

    Wellington, New Zealand

  • Elodie S

    Lauderdale By The Sea, FL

  • Arlo F

    Berkeley, CA

  • Bas B

    Breda, Netherlands

  • kevin f

    cincinnati, OH

  • Staffan H

    Goteborg, Sweden

  • Joseph B

    Chicago, IL

  • Paul S

    Toronto, Canada

  • Timm R

    Cologne, Germany

  • Brendon C

    Los Angeles, CA

  • Robbert N

    Zoetermeer, Netherlands

  • Tyler D

    Edmonton, Canada

  • Hamish W

    Christchurch, New Zealand

  • Brandon S

    Somerville, MA

  • Glen F

    New York, NY

  • Edwin S

    Long beach, CA

  • Garry C

    Birmingham, United Kingdom

  • Makoto K

    Kawasaki, Japan

  • Akifumi K

    Nagaizumi, Sunto-gun, Japan

  • Tyler C

    Austin, TX

  • Richard L

    London, United Kingdom

  • Lauri K

    Amsterdam, Netherlands

  • Olex P

    New York, NY

  • Stijn Kuipers

    Amsterdam, Netherlands

  • Einar G

    Oslo, Norway

  • Justin P

    Plymouth, MI

  • Ludovic J

    Biesheim, France

  • James S

    Fairburn, GA

$21,213 raised

of $1,500 goal

1,414% Funded! Order Below

Product Choices


x0x-heart Module

x0x-heart Front


x0x-heart Module - 5 Pack

Intended for distributors (or if you're just looking for a symphonic wall of acid): $215 each.


x0x-heart Module - Kit

Build your own module - the kit includes the panel, the pacemaker, the x0x-heart itself, knobs, Euro cable, etc. Some patience + a soldering iron, and you've got yourself a module. All required soldering is through-hole.


x0x-heart Module - Kit - 5 Pack

A distributor pack for the shops catering to the DIY enthusiasts: $185 each.


Open Music Lab Logo

Open Music Labs

Analog and digital techniques - tools for musicians, composers, and tinkerers.



Front panel graphical designer

Metalphoto of Cincinnati


Panel manufacturer

RW Technologies US LLC


PCB assembler

Subscribe to the Crowd Supply newsletter, highlighting the latest creators and projects: