Here are two expanders for the Turing Machine / Random Looping Sequencer.
One RLS with a backpack can control one Pulses module and one Voltages module. With a bit of hacking, you could probably connect two Pulses or two Voltages, if you wanted.
All three are fast, simple builds. If you managed to build a RLS, you can definitely build these. If you bought an RLS but would like to try DIY, these could be a place to start.
Like the Turing Machine, this is a completely open source project. The schematics, Eagle CAD files, Gerbers, laser-cuttable panel designs and Mouser BOMs are all available under a Creative Commons license that permits unlimited commercial use.
One of the people making use of that license is Thonk in Brighton, who are offering full kits for all three expander PCBs. (Muffwiggler thread on Thonk kits)
Documentation and build documents
(All CC licensed)
The latest version is v2.1, which fixes the capacitor polarity issue in v2. V2 schematics and documents are below.
– This PDF file contains block diagrams, how the circuit works and how to build the PCB.
Eagle and Gerber Files
You can send these Gerber files directly to a PCB fabricator to make boards. The process is explained here.
These are illustrator files suitable for laser cutting acrylic panels.
Backpack (£4.50 in May 2013)
Voltages (£21.02 – faders!)
Licence: This is an open source hardware project. You can use this design however you like, including any modification or commercial production, so long as you credit Tom Whitwell and share your own changes. Random Sequencer by Tom Whitwell is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
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