Alan & Friends is an adaptation of the classic Music Thing Modular Turing Machine and its Volts and Pulses expanders, bringing the full random sequencing ecosystem together into a compact 4U format module.
At its core is the well-loved Turing Machine — a semi-random looping sequencer capable of generating evolving melodies, repeating voltage patterns, and unpredictable rhythmic movement. Rather than offering only the main sequencer section, Alan & Friends also includes the essential sequencing expanders directly on the module, creating a complete “meta” random sequencing system in a compact 4 horizontal unit layout.
The left side contains the main Turing Machine sequencer, the center section provides the Volts-style stepped voltage outputs, and the right side houses the Pulses gate outputs for rhythm and trigger generation.
While the module is feature-dense, each section remains straightforward and easy to understand. The design uses a stacked dual-PCB construction, with circuitry remaining accessible from the rear even when fully assembled.
The expander connections remain compatible with the original Eurorack expanders, allowing existing PCBs and DIY adaptations to be used if desired.
Technical specs
Outputs:
Pulses: 0-5V
Noise: +/-5V (typ.)
CV1: 0-10V
CV2: 0-10V
Inputs:
Sequence modulation: +/-5V
Depth:
Current draw: TBD mA on -12V, TBDmA on +12V.
Alan & Friends SDIY Build Documentation:
PCB V2.1 & Panel Bill of Materials
Schematics
SDIY Build Guide
Original Gitlab Documentation
This project was made available with the blessing and permission of Tom Whitwell & Phonemes (HUGE THANK YOU to both!!)
For more information see https://musicthing.co.uk/
Also the original Modwiggler thread here.