latigid on

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Everything posted by latigid on

  1. Troubleshooting midiphy SEQ v4+

    How are your 10-pin resistor networks oriented? The 74HC165 inputs of IC3 should be at about +5V You haven't soldered the switches in, so are you confident that you are properly closing the switch pads? Maybe try to bridge them with metal tweezers or similar. Make sure set debug on is active. You should be able to control the 74HC595 pins (or resistors R1-8 from the MIOS terminal with set dout x 0|1. Each 595 has 8 outputs so IC2 is 24-31 for _R and 0-7 for _L. During normal running of the (correct) .NGC you should measure some voltage on the pins of IC2, which controls the sink driver transistors.  
  2. How about veroboard/perfboard? Needs fairly standard spacing to work though.
  3. Troubleshooting midiphy SEQ v4+

    Photos of the rear of the PCBs would be good. Did you measure any input with set debug on?  Try connecting only JA and test with seq_l. Try connecting only lemec_l and test with seq_r. 
  4. midiphy Eurorack Expander Modules

    What is the jumper setting with J5? Choose USB to power it this way. (check the +5V rail is not shorted to 0V)
  5. MIDIbox SEQ V4 Release + Feedback

    Thanks for the clarification on the CV channels. I could see a usecase for four modules if the velocity function was added, which I didn't remember BTW! This could add some expression, e.g. as a mod source mixed into a VCA -- great! And the accent trigger on the spare gates is awesome. For the drum triggers, I figured it was a code issue, as the clocks are easy to calculate in advance. In the meantime I think Andrew implemented a pulse stretcher in hardware, but if it is not too much effort I'm sure more software flexibility would be welcomed. Besides, we have the option of the standard trigger length, which I guess is one "step" long? Best, Andy  
  6. MIDIbox SEQ V4 Release + Feedback

    I find the proposal too cryptic. It would IMO be more intuitive to display more information on the FX page/menu.
  7. midiphy Eurorack Expander Modules

    Awesome, have fun with the CV! A small case is a sensible idea as it can keep the modular addiction contained :) Thank you for the framework and codebase to enable development of these modules. Best, Andy
  8. midiphy SEQ v4+

    #21 ! and Holy Modular Batman! That's all DIY too !!?? Awesome!
  9. seqv4 problem

    Note that the Wilba board is wired in a way that the switch bodies carry some signals too. Think of the switch with two halves.  A A' B B' When the switch is not pressed, A still connects to A' and B to B'. Think of it like a clipped resistor leg soldered between the two PCB pads. The idea/function is to act as a "bridge" to avoid lots of vias or a 4-layer board, as you can effectively jumper the signals over and under each other. When you press the switch, then the switch acts as you think it should and connects parts A + B. Naturally all contacts are connected when the switch is depressed.   I would be tempted to load MB_NG and manually check the functions. E.g. you can read DIN events with set debug on (short the "cathode" part of the switch to 0V/ground) and simulate a matrix with set dout x y and try to gauge if the switch works that way.
  10. Troubleshooting midiphy SEQ v4+

    Hello, I can't offer much help because I can't quite understand the things I've highlighted in bold. If you can clarify those points I'll do my best. At a guess, the problem might lie with IC4 as it processes channels 7+8.
  11. Troubleshooting midiphy SEQ v4+

    Woohoo! If you wish you can post a picture in the main thread and claim your serial number :) http://midibox.org/forums/topic/20885-midiphy-seq-v4/  
  12. Troubleshooting midiphy SEQ v4+

    Try the boot config on flash. Also rescan devices in MIOS Studio normally doesn't work. At least for me I have to restart each time the MIDI device changes i.e. after each firmware update and reset. Consider the following troubleshooting earlier in the thread:   Good luck!
  13. Troubleshooting midiphy SEQ v4+

    And how was the display issue resolved btw?
  14. Troubleshooting midiphy SEQ v4+

    Did you restart MIOS Studio after updating? You say Discovery, but are you using one of those or a Waveshare 407v board? If it's the latter, what are the settings on the switches? What jumpers are present? You can stuff the JPA0 jumper on the wCore board if you need to reflash from bootloader hold mode.
  15. I can't quite picture the concept, could you draw something?
  16. Troubleshooting midiphy SEQ v4+

    Always check for shorts! On experience this is typically caused by a bad cable or excess copper on the connector end shorting on the OLED PCB. Depending on when your parcel arrived Peter might have put a piece of kapton tape on the OLED. You can try with a piece of paper or tape. Also check R33D on the Core is 560R.
  17. Troubleshooting midiphy SEQ v4+

    Do you still get a DIN event in MIOS Studio? Is the switch soldered in properly? The associated diode? If the other switches in the column work, then the matrix is okay and the issue might be with the LED itself or the switch of course.
  18. Troubleshooting midiphy SEQ v4+

    Check T14 and R14! Do you measure any voltage out of pin 2/R14? Follow that down to T14. When you read the T14 label right way up, you should have continuity to R14 on the top-right pin, +5V on the top left pin. The bottom pin is the source current for your green LEDs on columns 3/7.
  19. Troubleshooting midiphy SEQ v4+

    Check the green diode functions by using a multimeter in diode mode (black probe to CC pin) directly on the LED legs. Some of the soldering doesn't look like proper joints were made, so make sure to reflow the pins. It would be odd, but maybe on RJ3 and RJ7? The description of the error points more to an issue with IC4 pin 2, R14 (resistor legs too long?), but from your picture these look okay. It might also be T14 on the front side of the board. This part of the schematic is on page 2.  
  20. Troubleshooting midiphy SEQ v4+

    @knochenfabrik Next steps would be to ask again whether you get any voltage out of the superDAC board channel 8 and then to measure voltages on the components/pins I mentioned. Perhaps take some better photos and lay the voltage measurements on top.
  21. Troubleshooting midiphy SEQ v4+

    Any luck on reflowing the components I mentioned? From the behaviour I would guess 8R49 or R57 are not properly soldered.  
  22. Troubleshooting midiphy SEQ v4+

    8R49 looks like a cold-solder joint.
  23. Troubleshooting midiphy SEQ v4+

    Cool, getting closer then! The components to check on transmute8 are probably related to the second inverting stage, so pins 5,6,7 of IC4, 8R33 (maybe), 8R41, 8R49, C29 and R57. Check if any of these parts are connected to 0V (ground). Only pin 5 of IC4 should be. Do you measure voltage on R57? Best, Andy
  24. Troubleshooting midiphy SEQ v4+

    Hello, Shouldn't need a special cable, but to be honest I've not played around much with the OTG stuff. Did you route the MIDI anywhere, set the channels up etc.?
  25. Troubleshooting midiphy SEQ v4+

    For testing tranmute8, you can start with no other boards connected. Verify no shorts on the power rail, though if your rack powered up that's likely not an issue. After connecting the Eurorack power cable, you should measure +12V/-12V on pins 4/11 of the op amps. Check that the op amp orientation is correct with pin 1 near the IC1/2/3/4 label. C3/4 seem to be correct. I think you should still get some output even with nothing connected to the op amp inputs. Outputs on J3 should each be at -5V. You can verify your octal board with a working binaire board.