5 hours ago, latigid on said:
Hi Niels,
Thanks for the update and details. I’m sorry that you had trouble with the soldering but maybe something was learned along the way. On the upside, the PCB can be easily replaced and because it’s modular you don’t have to throw away the rest :).
Best,
Andy
I am not really experienced with the really tiny soldering like the dacs but experience comes with trial and error and it will probably work out this time, You can’t always throw six 
2 be continued
Just now, latigid on said:
looks awesome and I’m glad it fits! Will you fill the rest with more CV modules or get a nice filter or VCO?
don’t worry, we’ll send some replacement boards and you can try again :).
It would also be nice to do some lfo’s from the midibox to a eurorack panel .. i am a sucker for lfo’s
A downstripped MBHP_CORE_STM32F4 module in Eurorack format would be nice-to-have as an alternative solution to the Euroreceiver - maybe with a SCS (6 buttons, encoder, display) - this would allow to run MBCV which gives us a lot of LFOs, Envelopes, sequencers, modulation matrices, etc.
Best Regards, Thorsten.
46 minutes ago, TK. said:
A downstripped MBHP_CORE_STM32F4 module in Eurorack format
I’m working on something like this, I try to do not exceed 50mm depth. I need it for the ,
And adapt the SCS to the euro format is also a good idea, ?
I plan to create another CS based on the work I made for with a pot for each parameter and TFT screen, like I did for the HAARP.
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Best regards,
Bruno
The wCore currently available could also be used as an F4 Core variant mounted in a Eurorack system. Depth would be the PCB length, so 77.5mm. The idea was to USB/SD PCBs mounted on the front panel, plus any MIDI DIN etc. as needed.
I think the next ProgrammA iteration would be a fine controller for MBCV and would use the same Line Driver/Euroceiver combo :).
very nice! Does it provide J8/9, J10A/B and J15A? (For J15A the pins for GLCDs with serial interface might be sufficient)
depth >50mm isn’t suitable, it won’t fit into my case; I guess that this limit is considered by most Eurorack modules.
Best Regards, Thorsten.
Just now, TK. said:
very nice! Does it provide J8/9 and J10A/B?
J8/9 of couse! No J10A/B
Here the available ports.
Sure, most skiff cases are much shallower than this. I built my own cases with probably >100mm depth, because a lot of the DIY modules from years ago were much deeper :).
wCore has all of the expected ports and could be mounted “straight on” like is done for the SEQ. This would have a shallower depth but a wider panel of course. It’s a compromise of using pre-fabbed MCU breakouts and avoiding fine-pitch SMT, as it can be difficult sometimes as we’ve seen!
You could also panel-mount a Discovery board Core in the same way. You’d miss panel-mounted SD access and a USB cable, but it’s very doable.
if you have time, would it be possible to define a requirements list of UI features (OLED real estate required, encoders, switches, 3.5mm eurorack input and output ports) that you would like to see in a new dedicated future MBCV module?
We were lately discussing/planning a new STM32F4 based digital oscillator eurorack module which may have quite similar UI requirements - that way we might get away with a single set of PCBs that could satisfy two usecases! :). 50mm max depth is a given.
Many greets and best regards!
Peter
Must-have requirements:
Optional:
Potential extension modules:
Such a module could also cover MBNG for script based processing.
Best Regards, Thorsten.
thanks a lot for your quick answer! We’re discussing it!
Many greets, Peter
19 hours ago, latigid on said:
It’s a compromise of using pre-fabbed MCU breakouts and avoiding fine-pitch SMT, as it can be difficult sometimes as we’ve seen!
DipCoreF4 will be assembled too, all tiny components(except pinheader and mini-USB) will be mounted. For less quarter size of the wCore. In fact DipCoreF4 + DipBoardF4(full platform) is smaller than the wCore alone.
The only differences are:
My version of the MIOS32 is already works with it and still works with the wCore, Disco etc…
I really think you should consider it one day cause you could like it 
I will send some on next batch, to you and Thorsten as you can evaluate it.
Best regards
Bruno
That’s the reason why I haven’t listed J10A/B in my requirements list - it’s just important to have a standard control surface (SCS), otherwise applications won’t be re-usable.
The 6 buttons + encoder could also be connected to an on-board DIN SR, connected to J9 as the first SR in the chain.
Would be happy to evaluate it.
Best Regards, Thorsten.
Thank you for your interest Thorsten,
The thing is that If Andy decides to create his version, I will stop mine, cause there’s no space for 2 different core euro modules which have the same purpose. Until yesterday I was sure to do it because nobody told he wanted to, now I don’t know.
That’s the reason I insist and try to convince him, more than that if Andy decides to play this game with me, quantity will drastically decrease the price, of course.
Anyway I will provide the platform to both of you as soon as I can, for you to decide after that
Best Regards
Bruno
I don’t have a solution ready for this, so you should try out with Bruno’s. Consider also using the Euroceiver and a desktop device where power requirements and space for displays/controls is not an issue.
Such discussion would be better suited to a private channel or at least in a dedicated topic.
On 3-10-2019 at 8:25 AM, latigid on said:
Hi Niels,
Thanks for the update and details. I’m sorry that you had trouble with the soldering but maybe something was learned along the way. On the upside, the PCB can be easily replaced and because it’s modular you don’t have to throw away the rest :).
Best,
Andy
Hi, yesterday i got myself the kester flux that suggested and reflowed everything from Scratch and unbelievable but it works now!! All channels can be calibrated and working like a charm. It really is helpfull to get the perfect flux i suppose instead of the cheaper 1 i got. Still i am going for a new pcb because i already ordered the pcbs and mouser parts and i want the modules to be perfect. In a coupe of days i will post my final setup. For now many thanks!
P.s. Maybe it is usefull to make a topic for soldering tips and tricks for other People.
Nice! If you like it’s also no issue to cancel the PCB order. But more DACs might be useful in the future. You can have up to 32 AOUT channels, so maybe a second A1 module set dedicated to CCs/LFOs? (I’m not 100% sure on the configuration.)
So we can conclude from this that the DAC is at least somewhat resilient to reflow/extra heating?
Hi, I received the new pcbs and soldering of the dacs went smooth as silk.
I got a small question about calibration : i have put the midibox to max and see a green Light on the active cv. When i switch cv output to another channel all go green except one. Tried to switch dac boards but all the same issue. Calibration to 10v goes well on the cv with the issue. Only max calibration does strange things on 1 channel. Is this explainable?
Cheers niels
Hello,
Glad it worked out better this time :).
I personally don’t use the min/mid/max calibrations but rather the 0V–10V. If you switch the channel back to off and then try another does the issue remain? Could be a software bug perhaps, but if you can calibrate I think it’s fine.
Best,
Andy
1 hour ago, latigid on said:
Hello,
Glad it worked out better this time :).
I personally don’t use the min/mid/max calibrations but rather the 0V–10V. If you switch the channel back to off and then try another does the issue remain? Could be a software bug perhaps, but if you can calibrate I think it’s fine.
Best,
Andy
Hi Andy,
Yes calibration is fine but i notice soms strange things with the led Lights. Everything is working fine but i have a strange bad feeling with on off switching of the leds when going to other channels. I think a video will be better for me to post since i cant explain by words i don’t know if this is expected behaviour or software bug etc. Will try to make a video this weekend.
Bye Niels
