Bring back the groove to eurorack.

The Robaux SWT16 is a 16-track eurorack trigger sequencer with up to 64 steps per track.

Programmable like a classic TR machine, the SWT16 can be used not only for triggering drum sounds, but also for Envelopes, S'n'Hs or resetting LFOs.

The SWT16 is polymetric - each track can have a different length, from 1 to 64 steps. Even more complex rhythms succeed with the individual clock divider per track.

The SWT16 has an intuitive user interface. All operation is via the illuminated 4x4 keypad. From the main screen, you can access the 16 different modes of the sequencer. The buttons adapt to the selected mode. With the back button, you can quickly return to the main screen.

Each track has its own trigger output. In addition, the triggers are also sent via MIDI notes (requires an adapter).

Get your kit at:


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Open Source

Since the sequencer is based on Arduino, you can easily change the firmware, add or remove features. This allows you to use the machines in a completely different way. For example to play minesweeper.


Download the manual.
Version 1.1.1
Version 1.0.7

Assembly Guide

Download the assembly guide.
Revision 2
Revision 1

Circuit Diagram

Download the schematic.

Firmware & Updates

Get the latest firmware on GitHub.

Bill of materials

To build the device you need the following electronic components: BOM.

3D Printed Parts

The sequencer uses custom parts that need to be 3D-printed. The button holder and the front panel can be found here on Thingiverse. You can also make a aluminum front panel from this file.



Number of Tracks: 16

Number of Steps per Track: up to 64


1 x Clock In

1 x Reset In


16 x Trigger Out

1 x MIDI Out

User interface

16 x backlight silicon button pads

1 x Illuminated push button


Width: 14HP

Requires a ±12V eurorack supply or usb power.