latigid on

Frequent Writer
  • Content count

    1,911
  • Joined

  • Last visited

Community Reputation

202 Excellent

7 Followers

About latigid on

  • Rank
    MIDIbox Guru

Profile Information

  • Gender Male
  1. Troubleshooting midiphy SEQ v4+

    There's an address for FOOTSWITCH in the hardware config file, but nothing for gate. Also, I'm pretty sure there is no routing for this in software, but it would be useful for a future update.
  2. Hi Henry, welcome! We developed the SEQ v4+ with those concerns in mind. It is different to the Wilba project. https://www.midiphy.com/en/shop-details/137/47/midibox-seq-v4-lh-full-essential-kit- On that page you have the full kit available, including the case and hard-to-source parts. There are left- and right-handed cases defined by the position of the JA subassembly. The combined BOM can be copied directly to Mouser's import tool, so it's super easy to get parts. Yes, sometimes Mouser goes out of stock, but many of the parts can be substituted by others (e.g. standard resistors, caps, ICs). Peter also has produced full video tutorials:       Best, Andy
  3. BLM 16x16+X build guide

    Nice!    
  4. Chiphead (another stereo SID bassline demo :))

    Don't apologise, it's more than I've done in years! My comment was more of a compliment on how you can get very creative patterns/variations just with a few scene changes using the LoopA..
  5. Chiphead (another stereo SID bassline demo :))

    Who needs automation when you've got two hands and a LoopA?
  6. Troubleshooting midiphy SEQ v4+

    It's normal as we need to shift the serial I/O on pins 5/6 through the registers. It works somewhat like a bucket brigade delay if that makes sense.  You're doing great! Keep at it.  
  7. Troubleshooting midiphy SEQ v4+

    Replacing the ICs also includes RN1? Are digital inputs now working properly (no random messages in MIOS Studio)? Quite a few of the joints look "cold." Did you solder the THT parts from the top or bottom? When you say  this results in the picture above? It's not too surprising if so, as the static from your hands can toggle the CMOS gates. That's typically not the best way to control 74HC logic though -- the static can also damage ICs. A picture of the rear would also be helpful. You can try to control the pins directly from the MIOS Studio command line with: set dout z 0|1 where z is from 0-15 on the JA board, 0 is low, 1 is high. Reset the Core, reopen MIOS Studio and don't load an _NGC file. http://wiki.midibox.org/doku.php?id=seqv4plus_jog has the matrix schematic. LEDs will light up if the the Cx column (dout 1 to 7; 0 not used for LEDs) is LOW and the Ay row (dout 10-15) is HIGH. Try not to light up too many columns at once. Note that it's not a proper scan matrix, so can be that multiple LEDs light up at once.    
  8. Troubleshooting midiphy SEQ v4+

    Good to hear some issues are fixed! Please check the resistor network on the JA board is the bussed type (15 resistors), not the isolated type (8 resistors). The ICs may have been damaged with backwards cables. Pretty please a picture?
  9. Troubleshooting midiphy SEQ v4+

    Okay. It's normally not an issue here but sometimes the boards benefit from a clean. It may depend on the solder/flux that you use. Do you use lead or lead-free solder?
  10. Display stopping Aoutng working

    Power issue pulling down the rail?
  11. Troubleshooting midiphy SEQ v4+

    What was the issue with SW-9-12? To test the MECs on SW17-20, like I said, there is no connection unless that switch is inserted (just the marked one). It's the mostly likely explanation. Inserting without soldering might work if the leads scratch through enough of the oxidation that naturally builds up on the through holes and component leads. Or it might not.
  12. Troubleshooting midiphy SEQ v4+

    For the row of MECs SW17-20, you do actually have to solder in the switch that has the "sink bridged by switch" label on the silkscreen. The metal part of the switch provides the connection. For SW9-12 I don't know. Wrong transistor type maybe?
  13. Troubleshooting midiphy SEQ v4+

    If SW1-4 work, then the problem is on the sink side. Check IC2 and associated resistors T3, T4 and the resistors/diodes adjacent. Are all diodes soldered with correct polarity?   Please post a picture with your question. It avoids guessing games and is more informative in most cases.  
  14. Troubleshooting midiphy SEQ v4+

    To be clear, I mean one similar to the middle tip of this picture, not the one on the right. It does mean that you have to solder with the iron the same way each time. Maybe my old tip was degraded or my technique wasn't right, but I never could get things going using the very end of the conical tip, rather I had to use the side.  
  15. midiphy SEQ v4+

    The power options are: 5V vreg, could be left out +5V rail from the case USB (power only) DB-25 cable (can suffer from voltage drop, thin wire)