latigid on

Frequent Writer
  • Content count

  • Joined

  • Last visited

Community Reputation

208 Excellent


About latigid on

  • Rank
    MIDIbox Guru

Profile Information

  • Gender Male
  1. Troubleshooting midiphy SEQ v4+

  2. 19" Rack MBFM with extended frontpanel

    There's a ready-made driver for MIOS32.
  3. 19" Rack MBFM with extended frontpanel

    You could always get a panel laser cut, that way the corner radius could be 0.15mm or less. That's fairly much square. If you push the LEDs through, the corners might also be "shaved" off in the process, no issue! We stock a quality white OLED. Simplest would be to use  this with a red acrylic "gel" or even have the whole window milled from transparent red acrylic. Are you using MIOS8 or MIOS32? The OLED driver works for MIOS32 but I don't know about MIOS8.      
  4. Troubleshooting midiphy SEQ v4+

    Well done! I think yours is the first green-blue one, will be nice to see it! Best, Andy P.S. cheers!
  5. Troubleshooting midiphy SEQ v4+

    I recommend to use a soldering iron to keep the heat away from the semiconductor dies/wire bonds. If you use hot air, perhaps bake the LEDs at 80°C overnight to lessen the chance of failures (steam microbubbles might cause issues). Note that I haven't tried baking the LEDs, so YMMV.
  6. Troubleshooting midiphy SEQ v4+

    Makes sense!  SJ pins correspond to the numbers on superflux LEDs: 1=red 2=green 3=blue. As you're not using the red superflux LED, you should instead jumper SJs to pin 2. This connects the MEC LED to the A pin on the RJ, so the hardware configuration should stay the same.  (this assumes that SJs A connect to 2 and B to 3)
  7. Troubleshooting midiphy SEQ v4+

    Pin 1 is correct for SJs. Unless you're using a different RJ config, such as green and blue LEDs? Picture would help to clarify.  Then are you sure about LED orientation? Check with diode mode of your multimeter. Red lead to circle, black lead to line on the MEC switch silkscreen should illuminate.  Some have had problems over-stretching LED legs causing them to break. It would be odd for all LEDs to break  though.   
  8. Troubleshooting midiphy SEQ v4+

    Missing/misconfigured SJs perhaps? Photo of the board?
  9. Troubleshooting midiphy SEQ v4+

    I can't offer an explanation that would have a problem isolated to SW18. If there was an issue with 165 ICs, then the whole column wouldn't work. If there was an issue with transistors on the sink side, then the whole row of four wouldn't work. My immediate guess would be that the diode is soldered the wrong way around or with cold joints. Could also be a faulty diode, but it's very unlikely. This is viewed from the top of the board. I've numbered the pins of SW18. Pin 1 (+2) is the cathode pin (also used for the LED). The connection should be common to the other switches SW17/19/20. If the marked bridge on SW19 is not present (i.e. no switch or bridge wire), then none of those four switches will work. Pin 3 is the DIN input. It should connect to the diode adjacent. The diode anode (i.e. non-striped end) should be common to other diode anodes in the column (i.e. on SW2/10).  
  10. Troubleshooting midiphy SEQ v4+

    Hello, just on the road at the moment, but you might try to check the connection made with a MEC switch. It is marked on the silkscreen as 'sink bridged by switch' or similar. The problem would be the same for all SW17-20. Test for continuity over that line and insert a bridge wire or solder the switch in if needed.  Are any other switches not functioning? 
  11. Troubleshooting midiphy SEQ v4+

     happy it was a simple fix! No worries!
  12. Troubleshooting midiphy SEQ v4+

    Hmm, I think that's the wrong part. The bussed network has a "2" prefix. Cross-check the part here: You should have only one piece of 652-4816P-T2LF-10K and two of 652-4816P-1LF-10K .   Best, Andy  
  13. Troubleshooting midiphy SEQ v4+

    Check pin 16 of the RN is connected to +5V. All 165 digital inputs (pins 3-6, 11-14) and pin 10 should be at +5V, possibly excepting 5 and 6 connected to the encoder. Check for continuity between DIN pins (they should typically not be connected). What is the part number of the RN just to be sure?   Photos would help, and a common problem is that the cable is not assembled properly. Try again with another cable.    
  14. How did i manage to fry my STM32 disco board?

    This one confuses me too. The blue button is the "boot hold" function, used to repair a corrupt upload or other. What you want to do is upload the bootloader app, which could be done from boot hold or the normal flash. Thereafter load _NG again.
  15. How did i manage to fry my STM32 disco board?

    The red LED continues to blink, no issue there.