Turing Machine Mkii – Panel / PCB & Chip Set

£40.38£44.58 (Excl. VAT)

This is a panel, PCB, chips & switches set – not a full kit.

This set includes all the chips and semiconductors required for the Turing Machine as well as the rotary and write switches. See below for full details.

Choose panel type/colour

Turing Mk II Rotary Switch (D-shaft)

In stock

Turing Mk II Write Switch

(on)-off-(on) momentary

In stock


This is a panel, PCB, Chips & switches set, not a full kit. This set includes all the chips and semiconductors required for the Turing Machine:

2 x CD4081
2 x CD4050
2 x CD4015
1 x CD4016
1 x TL074
1 x DAC0800
1 x TL072
1 x TL431
1 x 2N3904
2 x 78L09

This set also includes the two required switches:

1 x Mini Toggle Switch – SPDT (ON)-OFF-(ON)
1 x  Rotary Switch 8-Way – D-Shaft

Since it was launched in June 2012, the Turing Machine has become one of the most popular Eurorack DIY projects. It is a random looping sequencer that spits out basslines and melodies. It generates strings of random voltages that can be locked into looping sequences. These sequences can be allowed to slip, changing gradually over time. This module was inspired by the long history of shift register pseudorandom synth circuits, including the Triadex Muse, Buchla 266 Source of Uncertainly and Grant Richter’s Noisering.

The 2016 revised Turing Machine has many improvements:

  • Rotary loop length switch
  • Pulse out
  • Two boards, includes Backpack circuit to drive expanders (compatible with old Music Thing expanders)
  • Easier to build: a larger PCB in the same width, clock and noise circuits are more robust
  • Noise level trimmer & reduced voltage in noise circuit to make circuit more robust with different noise transistors
  • Compatible with existing expanders (Pulses, Voltages, etc ) but not the BYTES expander.

“I am interested in perceptible processes. I want to be able to hear the process happening throughout the music.To facilitate closely detailed listening a musical process should happen extremely gradually.” Steve Reich, Music as a Gradual Process, 1968.

Power – 40ma +12v, 0ma -12v

Depth – 33mm

Width – 10hp

Modular Grid – https://www.modulargrid.net/e/music-thing-modular-turing-machine-mk-ii

Build Document – https://thonk.co.uk/documents/turing2016/

Info – https://github.com/TomWhitwell/TuringMachine

BOM – https://docs.google.com/spreadsheets/d/1FUUejrNd6qe-PUmlLi0BAgiGKWX9DxQH3Jt5qFOxPAQ/edit?usp=sharing

Build Thread – https://www.muffwiggler.com/forum/viewtopic.php?t=159116

For support start an new issue here – https://github.com/TomWhitwell/TuringMachine/issues

Additional information

HP Size

Choose panel type/colour

Weight N/A
Panel Type

Aluminium Frontpanel, Black Aluminium Frontpanel

HP Size

Turing Mk II Rotary Switch (D-shaft)

Weight 0.0077 kg

Turing Mk II Write Switch

Weight 0.00505 kg

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