Ripthorn's MLS-5: A MIDI Controllable Loop Switcher

Original effect designs complete with schematics, layouts and instructions. Freely contributed by members or found in printed or online publications. Cannot be used for commercial purposes without consent of the respective owners of the copyright.
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Ripthorn
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Post by Ripthorn »

Last fall I bought a Boss MS-3, which I quite like. I rarely use, but like to have, several effects, so I thought it was perfect. Having three switchable loops was cool, too. Until I looked at all my overdrives, that is. I decided I would like to have more, so I started digging in to how to do it. I settled on using an Arduino nano-based solution that would allow me to connect the Boss MS-3 MIDI out to my switcher so that I can switch loops via patch changes or enable/disable them locally via footswitches. I have it all in a 1032l enclosure, like this:

Image

I have decided that it works well enough to offer it to the DIY community. I have a several page build doc, perf board layout, code, etc. that can be gotten by going here: https://scientificguitarist.wixsite.com/home/mls-5. Please let me know how you get on. Thanks, and rock on!
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Ben N
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Post by Ben N »

I think this is exactly what I need to expand my Switch Doctor. Thanks!

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Post by Ben N »

Having trouble opening the zip files. Could you take a look at that, Rip?
Thanks

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Ripthorn
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Post by Ripthorn »

I'll take a look at it. I will also be updating the build doc in the next day or two with the full schematic.
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Ripthorn
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Post by Ripthorn »

I had no issues on either a Mac or PC with the .zip file. However, I have just updated the build document with the schematic, so please try again and let me know if you are successful in downloading it.
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Post by Ben N »

All good--when I clicked the "Clone or download" button instead of on the file names, I got the master file, and everything opens fine (after I updated my copies of DIYLC and Libreoffice). But I don't see an schematic, and note that the files appear to be five days old. No worries--the layout looks to be clear enough.

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Ripthorn
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Post by Ripthorn »

Interesting, I updated the document with the schematic today. This is my first time using github, so I don't know exactly all the ins and outside. Good luck with our!
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Post by Ripthorn »

A little video demo of it in action:

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Post by sirlurch »

This is really cool. Thanks for sharing.

Any thoughts on a matrix switcher that would allow you to change the order of the effects in different patches?

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Ripthorn
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Post by Ripthorn »

sirlurch wrote:This is really cool. Thanks for sharing.

Any thoughts on a matrix switcher that would allow you to change the order of the effects in different patches?
I have certainly thought about it. It would require the use of a cross point switch chip, which is a high-pin count SMD chip that runs about $15/each. However, one could do quite a lot. I've worked on the design and code, but haven't done a board or actually tested it out yet.
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Post by yeahiii »

Thanks a lot for sharing! I am thinking about building one of those based on a teensy. Did you ground the enclosure to audio or digital ground?

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Post by dsqu895 »

Ripthorn wrote: 27 Feb 2020, 17:14
sirlurch wrote:This is really cool. Thanks for sharing.

Any thoughts on a matrix switcher that would allow you to change the order of the effects in different patches?
I have certainly thought about it. It would require the use of a cross point switch chip, which is a high-pin count SMD chip that runs about $15/each. However, one could do quite a lot. I've worked on the design and code, but haven't done a board or actually tested it out yet.
Hey Rip, Did you ever go any further with the matrix switching? A google search doesn't seem to bring any results for a DIY loop switcher with pedal order swapping

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Ripthorn
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Post by Ripthorn »

I did a little more development on it, but it's still mostly schematics and pseudo code. I should revisit it. I don't think it should be overly hard, I just keep getting distracted 😆
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