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latigid on

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  1. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Pictures? You can also use the dedicated thread here:

    • Did you solder in an isolated resistor network rather than a bussed one? Is the polarity correct?

    The random data might indicate floating 165 inputs.

    Other ideas:

    • Try also with set debug on to see the actual SR positions.
    • Is the NG file the LH one, assuming no other boards are connected?
    • Is there any conductive flux residue left around the pins?
    • Are you using the wCore or something else for testing?
    • What is the length of the ribbon cable?

    BLM positions are here. SR side is as you would expect, but also attached here for convenience.

    Best from snowy Boston,
    Andy

    JA_BLM.JPG

  3. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    12 hours ago, Menzman said:

    Hi everyone,

    just finished my first V4+!

    -->Big thanks to Peter and Andy for their great work (and support) to make this machine happen! 

     

    After playing around for some hours I found out one issue with my build: Always the eights encoder (8 & 16) do not react as expected. The encoders are jumping in the wrong direction and also opening random-like pages/functions when using them. :-(

     

    Great work and nice pictures! 

    Are the encoder pins in question shorting out on  the pinheaders below? If so, trim the pins a little.

     

     

    9 hours ago, gbrandt said:

    Hi Peter,

    I'm happy I can contribute a little bit back after lurking all those years :-)

    Concerning the LED, i've marked it in red now which means parts where people should be careful in replacing.

    And I checked my previously bought MIDI ports again from both Tayda and Mouser and it's true Tayda seems much cheaper and doesn't have a nice metal casing. I marked those, too.

    Another thing I noticed, not related to Tayda, is that the MEC switches are out of stock at Mouser now. too many SEQ V4+ builders? :-)
    I did find some at RS so might order from there (unless someone has a huge stock and wants to make a nice offer),
    but i'll eventually add more columns for other vendors

    Cheers,

    Gerhard

    I'd recommend Reichelt for MEC switches. Conrad also sells them, and the caps I think are cheaper there.

  8. CORE_STM32F4 Module, LCD, and fire

    in MIDIbox Documentation Project

    Posted

    When you look at a male IDC pinheader from the top, the pins are numbered  

     ________________________
|02 04 06 08 10 12 14 16 |
|01 03 05 07 09 11 13 15 |
__________----___________

     

    Because we normally connect displays on the rear side, the Core J15 is mirrored, so it's actually 

     ________________________
|16 14 12 10 08 06 04 02 |
|15 13 11 09 07 05 03 01 |
__________----___________

     

    Thus the pin numbering starts at 01 in the bottom right corner.

    Could you check that these pin numbers correspond to those on the LCD when the cable is connected (with the power off)? Or are the pairs inverted as Bruno says?

    Otherwise the pinning on the LCD (unless it's mislabeled) looks to correspond to the Hitachi standard. 

     

  12. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    10 hours ago, Antichambre said:

    Andy,

    For future case production, you can maybe open the metallic plates between the two left mounting hole and use this type of header:
    ew_thumb.png
    Just an idea, cheers!
    Bruno

    A good idea and one I had considered, but I think the cutout would weaken the plate too much there. Plus, the clearance to the I2C board will be quite close when the case is in rack mode.

    I had a look at headers mounted to a tiny PCB, but I think there's just not enough room, even with micromatch or "paddleboard" type. Consider 10mm spacing, 2.54mm plastic standoff on a straight-pin header, then a 1.6mm carrier PCB. I didn't find a header lower than that height difference. I would suggest to put a sliver of kapton tape on the components/IDC.

  13. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    BLM-MIDI_IN.thumb.JPG.da464c378b0fdabc00

     

    If you wish, it is possible to bridge the pairs of pins 4/4 and 5/5 as shown (viewed from the top of the board). It isn't done by default, as simultaneous use with a BLM would cause a conflict and perhaps an expectation of an "extra" MIDI port. If you and any future owner of the SEQ are aware of this it should be okay.

  14. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Great that you found the solution!

    The mounting is very tight indeed, and insulation seems like a very good idea.

    I wonder if it's better to rather mount the IDC directly to the OLED, for instance using:

    HIF2E-14D-2.54RB(20)
    (only 14 pins, but it would work, as the backlight is not required. HIF2E-16D-2.54RB(20) is not in stock at Mouser, but could be ordered. There's also the RA type (grey colour I think)

    https://www.mouser.de/ProductDetail/Hirose-Connector/HIF2E-14D-254RB20?qs=sGAEpiMZZMs%252bGHln7q6pm7F1NlCFAzwf%2fz35lHmVYIJ7sqU4G2Cmfw%3d%3d

    HIF2E-20D-2.54RB_20_SPL.jpg

     

  15. AOUT Alternative - Expert Sleepers Fader Host

    in MIDIbox SEQ

    Posted

    Have fun! Keen to see a video of the jam/performance (if available) :). Are you using the Host port (USBA) of the v4+?

    Lots of people are asking for CV/gates for SEQ v4+, so I will work on a DIY solution using the intended Line Driver. I think I have a way of generating the +5V inside the Eurorack case that should avoid sending power down the DB-25. Will need to be tested of course!

    Not intended to discount the FH-1 solution in any way! It's great if it works for you.

  17. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    3 hours ago, rbv2 said:

    those switch-caps and led-window looking great. also the color scheme is fresh.

     

    after the completion i realized how important it is to have the super flux leds exactly in the middle to achieve an even illumination. seems obvious, but i didn't think about it.

    Consider giving the leds another try. ...still have six left :)

    is there a special reason for the size of the cutouts for the super flux leds?

    maybe a good idea to make the cutouts a bit smaller in a future revision of the le mec pcbs?

    greetings

    rbv2

     

    ...

    I would like to add that this is a very pedantic observation :P

     

    I will request that the fab cuts the next lot a bit smaller. We're at the lower limit of the corner radius for the router bit though, so there's not much to be gained. If you centre the superflux legs on the SMT pads, you can control the diagonal displacement to get it a bit more in the middle. Personally, I never noticed an issue with alignment, even with the LED at the side of the cutout.

    It is actually possible to increase the light transmission by wrapping the sides of the Matias switch with alu foil. Although the risk is low, I wouldn't recommend, just in case the foil falls off and shorts a component. Maybe there's some sort of foil tape? 

  24. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    For best brightness balance (and LED lifetime), use the latest specified values. The others will work though. You could also get creative with adding two 22R together if you happen to have spares.

    What is your colour scheme? Normal red-green or something else? Note that the firmware will allow to swap LED colours around. Obviously this only works with the connected LEDs. Peter did a "cyan-red" version for his first build. You can do this by doubling up green and blue for example and use the extra pad located on the RJ.

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