Good call, I tested using a hub and my keyboard powered up fine but of course there was no MIDI because hubs do not work with Axo. Will need to get a type-C adaptor thing because I live in 2013.
New Axoloti prototype
lokki
#22
yes, had to get those as well 
USB hub functionality is probably one of the most wanted from the old days, so once this hardware is working fine, we could try and tackle this..
btw. if you have a spare prototype i am happy to test things out, if you need another pair of ears/eyes
sebiiksbcs
#23
I do have one spare prototype but the design has changed quite much in details and pinout. So maybe wait for the second revision! Anyone let me know if you want a prototype because I could order a few more. But I cannot give them out for free.
Also anyone interested can find the modified source code at https://github.com/sebiik/
sebiiksbcs
#24
So by now I have had a few ideas for a name and my mind stuck with Noloti.
It relates to the original name while sounding minimal and nondescript. An open canvas. Just like your New Patch window. Just like the future of Axoloti.
Now we just need to hire a video crew to make a cheesy retro ad clip.
poetaster
#25
Looks like exactly what I'd hope for. A breakout with 5 pins is still relatively easy to cable up and the daughter board could face out one side or front/back. With the enclosures I've built to date I was always a bit unhappy that all connectors ended up on 'the back' simply by virtue of the gpio being exposed along the one long edge. That's also, obviously limited by my design skills, cough. In any case, I'm liking the layout you've got!
poetaster
#26
May I ask where you're having the prototypes made? I've used aisler.net for small runs and jlc for larger runs.
sebiiksbcs
#28
JLC only so far but open to support other companies! Did not know about Aisler and checked them out, they seem really high-quality.
sebiiksbcs
#29
Good call, yes, mounting holes are already on board now! Though only two M2.5 fit the limited size and I wanted them to be a whole number of mm apart.
JoshuaACNewman
#30
Very exciting! I haven't logged in in a long time and this was reason to fish out my password!
It looks like this fits well within Eurorack size and power requirements. Is there protection for over/undervoltage?
Barring supply chain woes that exceed my resources, I'm excited to buy and try!
sebiiksbcs
#31
Thanks JACN. There is USB power protection exactly like on the Axoloti. This core board does not produce 5V so the relevant 5V regulation, power protection, and CV circuitry is assumed on the parent board. All planned in.
Moutcast
#33
hm...absolutly phantastic, that it is continuing even with the old chip. love the new format too...only regret that i just had a aluminium box designed with perfect fitting holes and poti and display circuit board for the old format...
sebiiksbcs
#34
That sounds good though, nothing wrong with the old format if you have one! Besides you have DC power, MIDI and jacks on board
MagAmp
#35
Hey Sebastian,
Hope this is not jumping the gun (where are you at with the testing of the code base, etc) but will there be a discussion of a group buy?
Regards,
MagAmp
sebiiksbcs
#36
So far I am open to any ideas. Group buy or something similar would be great when the prototype and code are confirmed and stable. I would not want to make a board available that has issues (mostly code-wise), or say more issues than Axoloti.
Nothing more frustrating than wanting to make music and getting some sort of Warning: C++ line:4279 something compiler something xyz: integer not something array of byte or something thrown at you from the patcher.
sebiiksbcs
#37
In the meantime I have finished Gill Stalks, a first "shield" for the Noloti (I am just going to call it that) which is the same size like the core and (hopefully) brings a simple control surface to the table.
- 6 pots
- dedicated in/out volume pots
- 3 buttons (two of which the original S1 and S2)
- 3 dual-color LEDs (one of which the original status LEDs)
- 10x input gain, input signal overvoltage protection via rail-to-rail opamps (read as "overdrive possible"?)
- 2 in/2 out 1/4 inch jacks.
This is in hopes to make Noloti usable as a simple desktop sound generator/effect box.
(I tried to add an optional 128x32 OLED but it may not fit. That is the reason for the fancy cutout around the Gill Stalks label. We'll see if it fits.)
sebiiksbcs
#39
Just to confirm, USB host is working with the same limitations like Axoloti. That is, only class compliant and no hub support (yet?).
The image below shows a nice way to add MIDI I/O to Noloti without the need for a MIDI board. These USB MIDI dongles are super cheap and somehow have never failed me as of now.
poetaster
#40
Cool! One note, often one needs to an expression pedal (or three). just a consideration when making faceplates. Nice work!