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About Karg

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    MIDIbox Newbie

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  • Website URL http://karg-music.blogspot.de/

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  1. Troubleshooting midiphy SEQ v4+

    @latigid onAll assembled and works well! Thanks a lot for the help again, it always pointed to the right location. Pictures for the s/n will follow soon :)
  2. Troubleshooting midiphy SEQ v4+

    @latigid onObviously, the SJs were the problem. I swapped their positions, and all tests work well now. Will continue with the build, there should be only the case left now :) Thanks a lot for the help again!!!  
  3. Troubleshooting midiphy SEQ v4+

    I sense that it is the SJs. Indeed, I use a different LED configuration for the Matias switches: Blue/Green. How does this affect the MEC leds?
  4. Troubleshooting midiphy SEQ v4+

    SJs are soldered from center pin to 1. (what are the configuration options?).  
  5. Troubleshooting midiphy SEQ v4+

    Thanks again! That hint pointed into the right direction. I exchanged the diode last night and then the switch worked :) Unfortunately, I directly experience the next problem. In this context, my appologies for bothering you so much. I have not fully understood yet how the wiring works, thus I am constantly fishing in the dark with my troubleshooting attemts and eventually run out of reasonable ideas. Your help is greatly appreciated!! The next (and hopefully) last problem is, after soldering the MEC/Leds the latter don't light up on both LeMEC boardsn when performing the l_seq.ng testing. I discovered it right after exchanging the diode last night, and have tried to isolate the exact problem since then. What I have done so far: Confirmed orientation of major parts, including LEDs Resoldered most connections Testing in MIOS Studio: l_seq.ng: MEC swithes are all recognized full Jog section works, including 16x8 matrix ngr set led:XXXX 127 switches all Flux LEDs on (checked by bridging the cathodes)
  6. Troubleshooting midiphy SEQ v4+

    I don't fully understand :( However, if I use a wire to connect the "sink bridged by switch" with the pin in the right bottom corner of a MEC switch, I typically get the "keypressed" response in MIOS Studio. However, with this test as well, I do not get this for SW18. All other swotches are working well (MEC and Matias).
  7. Troubleshooting midiphy SEQ v4+

    Troubleshooting round two. I am a lot closer to finishing the build, and just have performed all tests described in the build video 2 around 1:30-1:40. All tests were successful but one: the MEC switch SW18 on one of the LeMEC boards (R, the larger one) does not respond. I took the switch out and shortened the pads to rule out a defective switch already. Further, I have traced the diode next to it to pin4 on IC3. Judging with my multimeter, this conenction seems good. My plan was to trace the other pins of SW18 of the working board, to then compare with the non-functional one, but I am failing to correctly trace them. Any hints towards the right direction?    
  8. Troubleshooting midiphy SEQ v4+

    Works like a charm now! Still annoys me, that mistake :) Particularly since it is mentioned everywhere to check the parts number (and I actually confirm every single item). I guess mistakes happen. Thanks a lot again for the quick and competent help!!! A beer is coming your way :) Actually, you don't happen to live in the Rhein-Main Area in Germany? Then we could have that one in person...  
  9. Troubleshooting midiphy SEQ v4+

    Aaaaah, this could have been so obvious. I will see that I change the ICs and then report back. Thanks a lot already!!!
  10. Troubleshooting midiphy SEQ v4+

    Actually, alone. That explains the matrix well. I was wondering already since the pins of the shift registers don't relly match up to the number of LEDs. Thought some fancy multiplexing is used :)  
  11. Troubleshooting midiphy SEQ v4+

    Hey guys, after succesfully building two Seq V4, I could not resist the V4+ version. In this context, I just populated the JA PCB, however, it unfortunately is not working as expected. My problem is the following: Using the NG application with SEQ_L.NG, I can trigger all LEDs individually by sending NoteOn commands from MIOS Studio. Yet, pressing any switch causes an irradic behaviour with several NoteOn being send (Ch3) and consequently several LEDs lighting up. Similarly, touching any solder point by hand elicits a similar random NoteOn and flickering response. Touching the SrOut connector fires multiple NotOn on Midi Ch1. Furthermore, sending CC16 from MIOS Studio does not light any led on the 16x8 matrix . In fact, during all my tests, I have not seen any of them lit :( Naturally my first suspect for the multiple NotOn messages were the 100n cap of the 74HC165, the IC itself, or the resistor network. I do not know how often I have checked and/or re-done the corresponding solder joint. Nothing has helped so far. I further checked the orientation of the 165 and the resistor network, as well as their part number based on the mouser BOM. For the 16x8 matrix, my tests were rather limited. I could not do a diode check before soldering, but the letters on the matrix side point to the bottom, and the parts are from Midiphy. Since I am currently running out of ideas, any help would be appreciated.
  12. @FlavioB: Operation is more or less the same as all other BLMs, so most likely, you will not need a "manual". However, I started writing my own BLM for the Launchpad Pro some weeks ago. While it is not finished yet, I can give you a recent version if you give me feedback in return :) Just PM me if you are interested...
  13. SEQ v4 CS PCB clone

    Same here :)
  14. Great work! I am very eager to try this as well! By any chance, in case you have updated your Launchpad code, could you make that available as well? Will be happy to give you feedback of course!
  15. SEQ v4 CS PCB clone

    No worries, this is a hobby for most of us and everybody understands your situation. However, I also can offer my help. I have all the parts required - except the CS. Desperately trying to get it...