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latigid on

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Posts posted by latigid on

  1. LoopA V2 Introduction, Features & Support Thread

    in MIDIbox User Projects

    Posted

    Hi Robert, I've seen it happen that the SD slot can be soldered with too much heat and this can kill things. How was your soldering of it?

    Check for continuity back to the 407v breakout pins, here's a convenient pinout of the SD card from the top:

    3M-SD-pins-top.thumb.PNG.dd43c37fdf38484

    NC NC NC PA6 0V PA5 +3v3 0V PA7 PB2 NC

    I would suggest not to solder the three leftmost pins. You can also check for flux residue or shorts there.

    Care to upload photos of your work? 

    Best,
    Andy

     

     

  4. LoopA V2 Introduction, Features & Support Thread

    in MIDIbox User Projects

    Posted

    Yep, the L4 superellipse caps were very popular and we sold the last sets over the weekend. More caps inbound but will of course take their time at the moment.

    Ordering a full kit would be possible if you were happy with the old clear-style caps, still some of those around. 

    For LED soldering, you can just mount the LEDs flush against the PCB. They will not fit through the case cutouts anyway. One user wrapped his panel LEDs with heatshrink (Schrumpfschlauch) to block light from neighbouring positions. It's a personal preference though; some like the effect of LED mixing.

    Best,
    Andy

  5. SammichSid LCD pin header replacement

    in MIDIbox SID

    Posted

    Mouser 517-929834-07-36-RK is one of the longest "standard" headers but only single row. Check the datasheet on the Mouser page and you will find other parts. None of the longer dual-row header 929710 are stocked apparently. But you could use a pair of single-row strips, which is what we do for the LoopA.

    • Like 2

  7. [SOLVED] SammichFM LED issue

    in MIDIbox FM

    Posted · Edited by latigid on

    Pics are a bit blurry, but it looks like the LEDs have the correct orientation. You should be able to scope a (probably) 1/8 pulse on the LED cathodes  anodes if that column's LED is illuminated. Likewise, you should see an alternating (but up to 1/8) pulse on the transistor base. Do the transistors follow the expected pinout?

    When uploading the hex file did you specifically choose the sammich one or "normal" MIDIbox FM?

  9. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Hi,

    These encoders should be decent, so I wouldn't think the encoder had gone bad. Rather, there might be an interconnection issue. The 9th encoder is connected to pins 4 and 5 of J1, so check that you get good contact there. If the pins don't reach far enough into the through-board header you might get an intermittent contact.

    Check all solder points too as you might have a dry joint etc.

    Best,
    Andy

  12. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Many thanks for reporting and I'm glad it works! Is the hub also connected to the computer and sending data that way? There is an OTG startup sequence where the devices have to decide who's the boss. Maybe things don't make it that far if there's too much going on with the datalines. Just speculation!

  15. midiphy Eurorack Expander Modules

    in MIDIbox SEQ

    Posted

    Not sure I understand fully. You adjust the trim pot to get the scaling as linear as possible, i.e. the trimmer should be set so each octave step is as close as possible to the target voltage. Then you use the SEQ encoders to finely adjust for each volt setting. The DAC can't drive negative bits, so there is a limit to the lowest setting. But the remaining octaves should be very linear.

    Did you already see @Hawkeye's video on the calibration procedure?

  18. Out-of-stock parts for midiphy BOM tool

    in MIDIbox SEQ

    Posted

    Some Mouser parts have longer lead times at the moment. Here's a few suggestions:

    595-SN74HC595DR ->
    595-SN74HC595D (just non-reel packaging)

    490-SJ1-3535NG ->
    490-SJ1-3535NG-BE (blue)

    594-K104K15X7RF53L2 ->
    75-1C10X7R104K050R

    806-KCDX-5S-S2 ->
    reichelt https://www.reichelt.de/din-socket-5-pin-semi-circular-printed-version-mabp-5s-p11178.html
    Conrad https://www.conrad.de/de/p/cliff-fm6725-din-rundsteckverbinder-buchse-einbau-horizontal-polzahl-5-schwarz-1-419666.html

    CR1206-JW-331ELF SMD resistors just use a 220R or 71-CRCW1206330RJNEAC
    WP154A4SUREQBFZGW Kingbright LED, tricky to find a frosted one, but basically any generic CC RGB LED will do, or a bicolour 3-pin is fine but normally not available in "nice" green.

    ***

    Feel free to post your suggestions or if you can't find a part.

  19. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    There's a few settings in the HWCFG to check e.g. (search "fast") 

    # the speed value for GP encoders which is used when the "FAST" button is activated:
ENC_GP_FAST_SPEED 3

# Auto FAST mode: if a layer is assigned to velocity or CC, the fast button will be automatically
# enabled - in other cases (e.g. Note or Length), the fast button will be automatically disabled
ENC_AUTO_FAST        1


# the speed value for the BPM encoder which is used when the "FAST" function is activated
ENC_BPM_FAST_SPEED 3

     

    Can you check if altering these changes things to your liking?

    Of course, some features might have been "broken" by hard-coding functions. In the Wilba SEQ version, there was one common fast button, no matter what encoder was pressed. In the v4+ we have all of the encoders on dedicated DIN inputs (matrix) to allow for different customisation. 

  20. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    The v4+ does nothing different to your previous method: the ID pin is grounded when in OTG mode and floating otherwise. Maybe check pin PA10 is correctly grounded on the wCore PCB/breakout? Cabling issue or missing contact through the 2x25 pinheader? Perhaps the value for R3 on the USB board is too conservative and 100R would be better.

     

  21. Troubleshooting midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Hi George,

    I'm not 100% on how it all works and could be wrong, but to my knowledge you shouldn't see any MIDI data on the computer from the slaved device plugged into USBA. So my first guess is that you should unplug the computer; you can't (or shouldn't be able to) have the SEQ as both host and slave at the same time. You could then check the SEQ MIDI monitor and route it out a different DIN port.

    Second thought is that the controller (which ones, so we can consider making a whitelist?) does not initialise properly.

    Best,
    Andy

  23. MIDIO 128 Midifyin an Allen Organ to work with Hauptwerk

    in MIDIfication

    Posted

    Your connections are unclear; do you use the buttons in a matrix or directly connected to DIN pins? For direct connections, one common wire must be connected to 0V (ground), not to a digital input! Switches then trigger when the inputs connect to 0V.

    Matrix wiring is more complicated and you have to arrange the buttons and LEDs (electrically, not necessarily layout-wise) in grids.

  24. AOUT module calibration

    in Testing/Troubleshooting

    Posted

    I suppose you mean an AOUT with MAX525? What app are you testing with? The SEQ has a calibration part too.

    But first, have you adjusted the trim pots to give a good scaling factor? The DAC with external reference outputs a voltage between 0-2.048V with graduations of 1/4096. The gain equation is also on the page.

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