I'm happy to work on some hardware after our launch in October.
I'm still a lot naive about Eurorack. Is it more important to have a lot of inputs, to be compatible with audio generators, or more important to have a lot of outputs, to modulate existing sound generators?
Hi Johannes, I am not engineer but do you think for scaling+shifting, is this eligible?
and to control +/- 5v by 3.3v, does this mean less resolution?
Thank you lokki
before I use motu ultralight, say sampling rate at 96000.
now I don't know what's the resolution from Axoloti + this LM324N circuit.
what do you want to connect? the motu as well? or is this just an example. 96000 is the sampling rate, bit depth would be more appropriate for "resolution" in that case. (sampling rate being the time resolution, where as bit depth would be the "amplitude" resolution.)
the analog ins of the axoloti have 12bit resolution, so that would be 4096 steps, plenty enough for most applications. since there will be some noise you likely get that resolution down to 11 or 10bits. (2048, or 1024 steps respectively)
the output dac that is talked about in this thread (dac8552) is 16bit, so that would be 65536 values, which is plenty 
Without MOTU, the purpose is to get rid of MOTU as the CV controller, which will be replaced by axoloti. I use laser to make something like lithography so the resolution matters. 96000 is sufficient but not below.
so you need the laser to be repositioned 96000 times per second? as i wrote the resolution of time is the sampling rate, the resolution of steps you can differentiate is the bit-depth. i think the motu will be 24 or 32 bit. if you need that high resolution you are out of luck with the axoloti. the dedicated audio output dac (that you could also use) has a resolution of 24bit at 48000 hz, so that could work maybe?
what kind of a laser? what interface does it have to be controlled by cv? maybe it would be easier to connect the laser directly to the axoloti or an arduino and write a sketch that does control the laser via a protocol, which would then be independent of dac resolution...
I used to control my laser by DAC cv control with skipping the ILDA protocol, it was convenient. I want a standalone laser machine that’s why I am looking into axoloti, I thought it would work with simple offset, amplifier circuit with two UA741 for example.
any news on euxoloti or any other solutions? Would love to integrate my Axoloti into Eurorack with some CV in/outs but I don't really have the capability to design and etch my own pcb's. some soldering wouldn't be the problem. Is there anyone yet that shares pcbs and maybe front panels with a bill of a materials?
This could be such a great thing!
EDIT: with what I can tell from Euxoloti build website everything looked pretty finished and there used to be kits on sale. Though after the last GitHub commit in Feb'17 Paul seems to have vanished. Live got in the way it seems. Sad to see this gone. Did he ever publish the cad files? Would it be possible to pick up where he left?
We definitely have a Eurorack roadmap. Once we're done making updates to the Wanderlust beta, we're going to be moving forward on the Eurorack ecosystem. We already have plates and brackets for an Axoloti Module:
Here is our lasercut Eurorack case:
We are also working on a power distribution board.
After that we will make a CV / Gate IO module so you can interface with the Axoloti. Check over here to see our progress: http://community.believotron.com/t/beta-blog-development-log-with-a-bit-of-random-yak-shaving
I think having a working prototype by the end of 2019-Q1 might be possible.
Best!
Hi!
Has anyone considered making a CV interface geared towards a standalone unit? I am imagining something slim and rectangular, with the interface on the top of the enclosure and the Axoloti IO in its full glory on the back.
I feel like this could appeal to people with a single semimodular synth or people looking to downsize their modular setup.
If I had the time, I would love to spin something up as a way to learn PCB and mechanical design, but I am not interested in this as a commercial project, more something for the community that could potentially expand the audience for the Axoloti project. I figured I would float the idea in case someone wants to pursue it and is in a better position to make something happen.
Also another thing I have been kicking around, I developed a project using this chip and it has some really interesting IO potential. It can run a touch sense controller AND has the potential for almost a dozen high quality 16-bit ADC inputs (the ST SDADC converters are leagues better than the SAR ADCs that are standard on F series MCUs).
These are my think-thoughts for today, wanted to get them out into the world rather than stewing on them!
My idea would be to spin a new Axoloti board, more appropriately dimensioned for Eurorack, with a few ins and outs for CV, and appropriate level conversion.
@tele_player: here you go: https://sebiik.github.io/community.axoloti.com.backup/t/eurorack-interface-boards-here/5610
I have thought of that myself but don't have the tools or chops to do it. I have seen what a properly formatted module interface can be in the Tesseract Nutella module that the Robertsonics Tsunami wave player board is plugged into, providing all the controls and interfacing needed for what would otherwise be a finicky PCB to work with in Eurorack. Fortunately the Tsunami comes in a easy form factor to work with.
I see plenty of modules based around Arduino and Raspberry Pi PCBs because they have such small formats. They don't mind having some connection on the sides or in headers for interface PCBs, that would be the way to redesign the Axoloti. Put a bunch of the connectors that go to the outside world on headers that can go to daughterboards and then panel layout and feature sets would be up to daughterboards (like the "shields" in Arduino) and a "standard" could be offered but custom deviations could be made by others.
i agree all this should be considered for a new axoloti board, but if you take off the midi end and add a MAX11300 or something somewhere, you're really not all that big for a little eurorack module..
i think it would be amazing if @paul and/or some of you guys could come up with an updated euxoloti version bsed on the current axoloti core. 8x CV I/O, couple gates, a little screen and some encoders. i am sure this would be very promising as a crowdfunded universal MIDI CV LFO ENV OSC module.
I have designed a Eurorack module with the full PCB laid horizontally with a full set of 16 jacks and switches below. It is a big module but capable of everything. I went as far as making a Front Panel Express panel but never spent the cash.
The main problem with the current design is that all the jacks and cards are all on the edge making the design less flexible. Also the PCB has to be at right angles from the panel. With those on headers, the jacks and card slots on the daughterboard can be laid out in any positions you want, or left out completely if wanted. MUCH more flexibility.
