latigid on

Pin 10 on U2 would seem not to have a pull-up resistor (all digital inputs need a defined logic state). Otherwise, it looks basically like it follows the DIN module schematic (can't say anything about your proposed mapping or header connections).

I have a few spare, never opened from the original packaging. PM if you would like some. I think 25€ + shipping (in Germany) is fair.

Once finished, post a photo in to claim your serial number! I would love to offer SN 111 but I don't think we're there yet :).

Well done!

Hi Jeremy: It happens :) That's right, pulling out the power/USB will do. Always restart MIOS Studio following a power cycle. Looks like the current one, yep! Yes, you need to jumper it, means opening up the case unfortunately. Also ensure that resistors R101/R102 are installed. Hope you can get back to the bootloader! If not, it's typically no biggie to reflash with ST-LINK or JTAG. Best, Andy

Might have been the one for an STMF1 core? Just checking, did you reboot the core and close/reopen MIOS Studio? If you did, see if you can use JPA0 to enter boot hold mode and try to upload the app again. If it doesn't help, it would need a JTAG programmer or even just an STM32 DISCOVERY board if you have one around. Note that there is only one SEQ app. The configuration is set by the HWCFG file that you upload onto the SD card. Best, Andy

Ace!

Hi Jeremy, The cables are the issue 90% of the time :) But what you see there is two columns not driving, so that could also be on the resistor networks (particularly RN5, pin12/13) and other shift registers (particularly IC20, pin 3/4). The other two LEDs on the first 16*8 row are not simple to explain as the other rows and columns are functional. Best, Andy

Great to hear!

Worked out with the JA matrix then? (Seems so, well done!) The normal fix for OLEDs is to put a jumper in J15s (3v3). Other options are to check R33D (560R), make sure there are no shorts from the back of the IDC cable to the OLED PCB and cabling in general.

I would still suspect the cables :) You should be able to measure continuity between the IDC8 socket on lemec and the first 8 pins of the JA IDC24 (i.e. closest to the ring MEC switches). With a cable attached of course! Are the matrices positioned the right way around? Upload a photo of your work on the JA and lemec_R. Otherwise, if you mean the top 4 rows of the matrix don't light up, that is to do with the sink driver IC18 and shift register IC17. For the driver: output side is pin 18 -> matrix bottom row (row 1), pin 17 -> row 2.. pin 11 -> row 8. Input side just the opposite leg on the IC. For the register: pin 7 -> row 1, pin 6 -> row 2 ... pin 1 -> row 7, pin 15 -> row 8.

MacOS caches your USB MIDI ports, to see the four new virtual USB MIDI devices after your initial firmware upload of the LoopA app, please perform these steps: * start the Audio-MIDI-Setup of MacOS (e.g. search for "audio-midi" with Spotlight) * disconnect the core module from USB * delete the interface in the Audio-MIDI-Setup * connect the core module to USB again. Hope it helps!

Looks like it's actually just gone out of stock. You might consider adding your location for more convenient shipping?

https://modularaddict.com/digital-out-dout-pcb-midibox

Thanks, glad you like it! It's really built like a tank :). I think documentation could be a cool community project, maybe you would like to start a wiki page? A user personally offered to write up some pages but I can imagine that life takes over and certain things drop off the priority list. To answer some of your questions: It is now on the (right-hand) JA board: click the respective button and the lower row of Matias keys chooses the layer. Note that this is a significant UI enhancement compared to the previous standard panel. Likewise, choose the respective JA button. Rather than track groups, you get instant access to all 16 tracks and can easily make multiple selections now, a significant UI enhancement. The concept of track groups still remains and is indicated by the group of four tracks, with the currently selected track coloured differently. In the SEQ v4+, most if not all button functions have their own dedicated buttons and there is no need for F buttons unlike in the previous version. If you wish to remap any of the buttons, feel free to edit the HWCFG file. This has the same workflow as before: select the menu and press the respective key underneath the OLED displays to access these. One important thing to note is that the previous "select" key is now called "shift". It really is a deep instrument! I would encourage you to try out some basic patterns and explore the options, for example the direction and divider pages, the MIDI echo FX, different scales etc. Have fun with it!

Well done #45! Pimped out with tinted windows! :-)

They could be indeed. That would particularly apply to J8/9 and IC1B.

Sounds like MB_NG is not loaded properly... if it is a Mac I think there is a way to delete some config or so. You can try with another OS or computer. I hope that you closed MIOS Studio between firmware updates.

You can always bodge the parts. LED anodes connect across a row 4148 anodes connect across a row, D12 cathode to bottom-left pin when viewed from the front. "switch cathodes" connect to SW17 below; for simplicity's sake that is the LED pin marked with a dash. As long as you get 4x MIDI ports it is okay, sometimes they will be named differently. This varies depending on your OS. Technically not. The matrix sink columns here are also driven by 74HC595s, so I would expect all or nothing. If the matrix was otherwise dysfunctional, you might see multiple button events triggered at once. You could consider to carry on with the lemec boards and then you can see if the signals make it through JA.

There are some joints that don't look to be properly formed e.g. the top row of the LED matrixes, fifth pin from the left viewed from the rear of the board. It could be a similar cold joint for your SW12. Were you testing with SEQ_L.NGC? Because if you have the switch matrix going, there is no reason why the LEDs should not light up, unless they all have reversed polarity. Test with your multimeter, diode mode, red probe on the circle, black probe on the flat. If you haven't loaded SEQ_L.NGC, then I wouldn't expect any LEDs to light up. Looks like the resistor network is the right part. Cables can also be at fault, or even the soldering of the buffer chips or the headers on the Core board.

Could you please upload a couple of sharp images of both sides of the board?

Nice! There is little more than a USB connection and even that is in the middle of the board, so I think you should be good here.

It would be difficult to desolder these parts as the metal acts as a big heatsink. An option I can see is to somehow cut the metal apart, even so there are just the pins left, then order new brackets. 3mm is probably too much to get the rear-panel components to align properly. In the end maybe you have to reorder the PCB and/or parts but it is worth a go to get them off.

Really glad you could get it working and cheers for the generous donation! Top effort on your part really.

You could try to bodge it by connecting the cathode end of the diode directly to the encoder switch pin. It is the one closer to the middle of the board (the one closer to the edge is the row sink and is common to the three preceding encoders). It would probably help to remove the encoder switch pin from the PCB totally and find some way to insulate it. Connecting directly from encoder switch pin to J2 pin 6 is also an option.