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DIY Jammer/Thummers ?
MUFF WIGGLER Forum Index -> Music Tech DIY  
Author DIY Jammer/Thummers ?
odditymedium
Any DIY Thummers or Jammers?

Wiki says "an ongoing open source hardware design project seeks to produce a royalty-free reference design for jammers, based on Thumtronics' prototypes" but I don't see any activity.
odditymedium
There is this by Analogueheave, a DIY Wicki-Hayden keyboard. Also ZiLaiHong made one.
gillspice
I made this one a few years ago:
http://wiki.lvl1.org/Isomorphic_Keyboard

I am currently working on a new modular pcb version on upverter so the same pcb can be used to male different size keyboards.

https://upverter.com/LVL1Soundbuilders/459f5b74e948c011/Modular-Isomor phic-Keyboard/
odditymedium
sweet, thanks gillspice!

could you put up the schematics for the older one too?

and how does one follow/build the one you posted on upverter? never heard of it b4
gillspice
There is a link to the pdf schematic of the old board in the first link. They are both based on midibox, more info on that here:

http://www.ucapps.de/midibox_kb.html

You can get the gerbers for the new one right on the upverter project page, i have made a non velocity sensitive one using the new board, I am going to make a velocity sensitive one next. I have only done midi out so far, want to do CV out as well.
odditymedium
thanks!

did you make any musics with it, what are your experiences with tonnetz layouts
gillspice
I havent made any recordings with it but I tinker with it now and then. To me it is a lot more intuitive than a piano layout.
odditymedium
how much is it to build one? a rough estimate of cost i mean
NS4W
gillspice wrote:
There is a link to the pdf schematic of the old board in the first link. They are both based on midibox, more info on that here:

http://www.ucapps.de/midibox_kb.html

You can get the gerbers for the new one right on the upverter project page, i have made a non velocity sensitive one using the new board, I am going to make a velocity sensitive one next. I have only done midi out so far, want to do CV out as well.


Great work! Would love to see one with CV out. Will it be monophonic or several voices?
Jaytee
Every time I look into this, I get hung up on velocity-sensitivity. There doesn't seem to be much in the way of an off-the-shelf solution for this.

Luckily I managed to buy a pair of Axis 49s before they went under, so I have those set up in the Jammer layout.
gillspice
I can give you a cost estimate when I get home next week (traveling atm).

I would like to do multiple pitch CVs out for polyphony as well as velocity CV out.
gillspice


The one i am working on now has wooden keys. Maple, walnut, cherry and hackberry.[/img]
masterofstuff124
want....
gillspice
odditymedium wrote:
how much is it to build one? a rough estimate of cost i mean


The brain is a ~$20 ST module from mouser: STM32F407G-DISC1

There is a midibox carrier board for it that is available here for $9:
http://midiboxshop.bigcartel.com/product/core-stm32f4-board

It also uses 1 DIN and 1 DOUT board, $7 each:
http://midiboxshop.bigcartel.com/product/din-module-board
http://midiboxshop.bigcartel.com/product/dout-module-board

Not sure of the cost of the switch board on Upverter, I have only milled a prototype so far, but each board supports 32 keys (would need to double the boards for velocity sensitive)

The cherry switches are ~$0.56 - $0.70 ea depending on volume

Tactile switches for velocity are ~$0.25

The caps are tough to estimate, and definitely the most labor intensive part (at least the way that i made them). I machine them out of either wood or acrylic. I would love to have them injection molded at some point, but would need to orchestrate a pre-order or group buy or something to cover the tooling cost.

That leaves the case, which is kind of up to you.

Hopefully that gives you an idea, it is largely dependent on how many keys and whether you want velocity sensitivity.
odditymedium
gillspice dear i sent you a pm
ungleichklang
@gillspice .. thanks a lot, now I know what I do with my other Midibox PCBs
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