AutoChanger for the Brother 950i.
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AutoChanger - A Knitting Machine Auto Colour Changer to replace a Brother KRC-900

This project was designed to provide a lower cost replacement for the commercial auto colour changer available from Brother for their 1980's electronic knitting machines.

You can read about the progress of this design at the following links:

Building a better colour changer - Part 1 - Designing Hardware

Building a better colour changer - Part 2 - Firing the lasers

Circuit Board Render The Arduino Uno compatible controller.

Schematic Design

Prototype Render An early render of the first prototype.


  • Arduino Uno compatible.
  • Automatically change between 4 different colours.
  • Audio guides.
  • Programable colour order.


This project was designed in 2017 by John and Sarah Spencer

Check us out at Heart Of Pluto

Made at!


To the HackMelbourne (CCHS, community of Melbourne, Australia.

To all other open-source developers whose countless hours supported every other aspect of this design.


The specific terms of distribution of this project are governed by the license referenced below. Please contact the copyright owner if you wish to modify the board for distribution. Please utilize this design for personal or research projects. Please acknowledge all contributors.


Licensed under the TAPR Open Hardware License ( The "license" sub-folder also contains a copy of this license in plain text format.

Copyright John Spencer, Sarah Spencer, 2017